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Ingo Molnar [Mon, 8 Mar 2010 14:20:50 +0000 (15:20 +0100)]
MAINTAINERS: Add Arnaldo as tools/perf/ co-maintainer
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Paul Mackerras <paulus@samba.org>
Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Ingo Molnar [Thu, 4 Mar 2010 11:27:39 +0000 (12:27 +0100)]
Merge branch 'perf/urgent' of git://git./linux/kernel/git/frederic/random-tracing into perf/urgent
Tom Zanussi [Wed, 3 Mar 2010 07:04:33 +0000 (01:04 -0600)]
perf trace: Don't use pager if scripting
It's useful for paging through raw traces, but just gets in the
way when scripting.
Signed-off-by: Tom Zanussi <tzanussi@gmail.com>
Cc: fweisbec@gmail.com
Cc: rostedt@goodmis.org
LKML-Reference: <
1267599873-8193-3-git-send-email-tzanussi@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Tom Zanussi [Wed, 3 Mar 2010 07:04:32 +0000 (01:04 -0600)]
perf trace/scripting: Remove extraneous header read
perf_header__read() is already done in perf_session__open(), so
remove it from the script gen case.
Signed-off-by: Tom Zanussi <tzanussi@gmail.com>
Cc: fweisbec@gmail.com
Cc: rostedt@goodmis.org
LKML-Reference: <
1267599873-8193-2-git-send-email-tzanussi@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Will Deacon [Wed, 3 Mar 2010 11:47:58 +0000 (11:47 +0000)]
perf, ARM: Modify kuser rmb() call to compile for Thumb-2
The Thumb-2 instruction set does not provide an encoding
for sub pc, r0, #95 as present in the rmb() definition used
by perf. This results in compilation failure when using a
compiler targetting an instruction set other than ARM.
This patch redefines rmb() for ARM by casting the address
of the kuser helper to a function pointer, therefore getting
the compiler to take care of making the call.
Patch taken against tip/master.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Cc: Russell King - ARM Linux <linux@arm.linux.org.uk>
Cc: Jamie Iles <jamie.iles@picochip.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <
1267616878-2154-1-git-send-email-will.deacon@arm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Ingo Molnar [Thu, 4 Mar 2010 10:47:50 +0000 (11:47 +0100)]
Merge branch 'perf/core' into perf/urgent
Merge reason: Switch from pre-merge topical split to the post-merge urgent track
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Frederic Weisbecker [Wed, 3 Mar 2010 01:25:22 +0000 (02:25 +0100)]
x86/stacktrace: Don't dereference bad frame pointers
Callers of a stacktrace might pass bad frame pointers. Those
are usually checked for safety in stack walking helpers before
any dereferencing, but this is not the case when we need to go
through one more frame pointer that backlinks the irq stack to
the previous one, as we don't have any reliable address boudaries
to compare this frame pointer against.
This raises crashes when we record callchains for ftrace events
with perf because we don't use the right helpers to capture
registers there. We get wrong frame pointers as we call
task_pt_regs() even on kernel threads, which is a wrong thing
as it gives us the initial state of any kernel threads freshly
created. This is even not what we want for user tasks. What we want
is a hot snapshot of registers when the ftrace event triggers, not
the state before a task entered the kernel.
This requires more thoughts to do it correctly though.
So first put a guardian to ensure the given frame pointer
can be dereferenced to avoid crashes. We'll think about how to fix
the callers in a subsequent patch.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: 2.6.33.x <stable@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Arnaldo Carvalho de Melo [Tue, 2 Mar 2010 18:25:38 +0000 (15:25 -0300)]
perf archive: Don't try to collect files without a build-id
To avoid these error:
[root@doppio ~]# perf archive
tar: .build-id/00/
00000000000000000000000000000000000000: Cannot stat:
No such file or directory
tar: .build-id/00/
00000000000000000000000000000000000000: Cannot stat:
No such file or directory
tar: .build-id/00/
00000000000000000000000000000000000000: Cannot stat:
No such file or directory
tar: .build-id/00/
00000000000000000000000000000000000000: Cannot stat:
No such file or directory
tar: Exiting with failure status due to previous errors
[root@doppio ~]#
More work is needed to support archiving symtabs for binaries
without a build-id, perhaps creating a perf.data UUID + adding
build-ids for the binaries copied into the cache and then have
this perf.data session UUID be a directory with symlinks to the
by now calculated build-id of the files inside it.
Or just do an extra pass and insert the calculated build-ids in
the perf.data header.
Reported-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Peter Zijlstra [Mon, 1 Feb 2010 14:36:30 +0000 (15:36 +0100)]
perf_events, x86: Fixup fixed counter constraints
Patch
1da53e0230 ("perf_events, x86: Improve x86 event scheduling")
lost us one of the fixed purpose counters and then
ed8777fc13
("perf_events, x86: Fix event constraint masks") broke it even
further.
Widen the fixed event mask to event+umask and specify the full config
for each of the 3 fixed purpose counters. Then let the init code fill
out the placement for the GP regs based on the cpuid info.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Peter Zijlstra [Tue, 2 Mar 2010 11:35:37 +0000 (12:35 +0100)]
perf, x86: Restrict the ANY flag
The ANY flag can show SMT data of another task (like 'top'),
so we want to disable it when system-wide profiling is
disabled.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Robert Richter [Mon, 1 Mar 2010 13:21:23 +0000 (14:21 +0100)]
perf, x86: rename macro in ARCH_PERFMON_EVENTSEL_ENABLE
For consistency reasons this patch renames
ARCH_PERFMON_EVENTSEL0_ENABLE to ARCH_PERFMON_EVENTSEL_ENABLE.
The following is performed:
$ sed -i -e s/ARCH_PERFMON_EVENTSEL0_ENABLE/ARCH_PERFMON_EVENTSEL_ENABLE/g \
arch/x86/include/asm/perf_event.h arch/x86/kernel/cpu/perf_event.c \
arch/x86/kernel/cpu/perf_event_p6.c \
arch/x86/kernel/cpu/perfctr-watchdog.c \
arch/x86/oprofile/op_model_amd.c arch/x86/oprofile/op_model_ppro.c
Signed-off-by: Robert Richter <robert.richter@amd.com>
Robert Richter [Thu, 25 Feb 2010 18:43:07 +0000 (19:43 +0100)]
perf, x86: add some IBS macros to perf_event.h
Signed-off-by: Robert Richter <robert.richter@amd.com>
Robert Richter [Thu, 25 Feb 2010 18:40:46 +0000 (19:40 +0100)]
perf, x86: make IBS macros available in perf_event.h
This patch moves code from oprofile to perf_event.h to make it also
available for usage by perf.
Signed-off-by: Robert Richter <robert.richter@amd.com>
Robert Richter [Mon, 1 Mar 2010 10:13:21 +0000 (11:13 +0100)]
Merge remote branch 'tip/oprofile' into tip/perf/core
Signed-off-by: Robert Richter <robert.richter@amd.com>
Frederic Weisbecker [Sun, 28 Feb 2010 19:51:15 +0000 (20:51 +0100)]
hw-breakpoints: Remove stub unthrottle callback
We support event unthrottling in breakpoint events. It means
that if we have more than sysctl_perf_event_sample_rate/HZ,
perf will throttle, ignoring subsequent events until the next
tick.
So if ptrace exceeds this max rate, it will omit events, which
breaks the ptrace determinism that is supposed to report every
triggered breakpoints. This is likely to happen if we set
sysctl_perf_event_sample_rate to 1.
This patch removes support for unthrottling in breakpoint
events to break throttling and restore ptrace determinism.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: 2.6.33.x <stable@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: K.Prasad <prasad@linux.vnet.ibm.com>
Cc: Paul Mackerras <paulus@samba.org>
Frederic Weisbecker [Sat, 27 Feb 2010 16:24:15 +0000 (17:24 +0100)]
x86/hw-breakpoints: Remove the name field
Remove the name field from the arch_hw_breakpoint. We never deal
with target symbols in the arch level, neither do we need to ever
store it. It's a legacy for the previous version of the x86
breakpoint backend.
Let's remove it.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: K.Prasad <prasad@linux.vnet.ibm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Frederic Weisbecker [Sat, 27 Feb 2010 16:10:39 +0000 (17:10 +0100)]
perf: Remove pointless breakpoint union
Remove pointless union in the breakpoint field of hw_perf_event.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Frederic Weisbecker [Wed, 3 Feb 2010 08:09:33 +0000 (09:09 +0100)]
perf lock: Drop the buffers multiplexing dependency
We need to deal with time ordered events to build a correct
state machine of lock events. This is why we multiplex the lock
events buffers. But the ordering is done from the kernel, on
the tracing fast path, leading to high contention between cpus.
Without multiplexing, the events appears in a weak order.
If we have four events, each split per cpu, perf record will
read the events buffers in the following order:
[ CPU0 ev0, CPU0 ev1, CPU0 ev3, CPU0 ev4, CPU1 ev0, CPU1 ev0....]
To handle a post processing reordering, we could just read and sort
the whole in memory, but it just doesn't scale with high amounts
of events: lock events can fill huge amounts in few times.
Basically we need to sort in memory and find a "grace period"
point when we know that a given slice of previously sorted events
can be committed for post-processing, so that we can unload the
memory usage step by step and keep a scalable sorting list.
There is no strong rules about how to define such "grace period".
What does this patch is:
We define a FLUSH_PERIOD value that defines a grace period in
seconds.
We want to have a slice of events covering 2 * FLUSH_PERIOD in our
sorted list.
If FLUSH_PERIOD is big enough, it ensures every events that occured
in the first half of the timeslice have all been buffered and there
are none remaining and there won't be further to put inside this
first timeslice. Then once we reach the 2 * FLUSH_PERIOD
timeslice, we flush the first half to be gentle with the memory
(the second half can still get new events in the middle, so wait
another period to flush it)
FLUSH_PERIOD is defined to 5 seconds. Say the first event started on
time t0. We can safely assume that at the time we are processing
events of t0 + 10 seconds, ther won't be anymore events to read
from perf.data that occured between t0 and t0 + 5 seconds. Hence
we can safely flush the first half.
To point out funky bugs, we have a guardian that checks a new event
timestamp is not below the last event's timestamp flushed and that
displays a warning in this case.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
Cc: Li Zefan <lizf@cn.fujitsu.com>
Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
Cc: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Hitoshi Mitake [Thu, 4 Feb 2010 07:08:15 +0000 (16:08 +0900)]
perf lock: Fix and add misc documentally things
I've forgot to add 'perf lock' line to command-list.txt,
so users of perf could not find perf lock when they type 'perf'.
Fixing command-list.txt requires document
(tools/perf/Documentation/perf-lock.txt).
But perf lock is too much "under construction" to write a
stable document, so this is something like pseudo document for now.
And I wrote description of perf lock at help section of
CONFIG_LOCK_STAT, this will navigate users of lock trace events.
Signed-off-by: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
LKML-Reference: <
1265267295-8388-1-git-send-email-mitake@dcl.info.waseda.ac.jp>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Tejun Heo [Wed, 17 Feb 2010 01:50:50 +0000 (10:50 +0900)]
percpu: Add __percpu sparse annotations to hw_breakpoint
Add __percpu sparse annotations to hw_breakpoint.
These annotations are to make sparse consider percpu variables to be
in a different address space and warn if accessed without going
through percpu accessors. This patch doesn't affect normal builds.
In kernel/hw_breakpoint.c, per_cpu(nr_task_bp_pinned, cpu)'s will
trigger spurious noderef related warnings from sparse. Changing it to
&per_cpu(nr_task_bp_pinned[0], cpu) will work around the problem but
deemed to ugly by the maintainer. Leave it alone until better
solution can be found.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: K.Prasad <prasad@linux.vnet.ibm.com>
LKML-Reference: <
4B7B4B7A.
9050902@kernel.org>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Frederic Weisbecker [Sat, 27 Feb 2010 15:18:46 +0000 (16:18 +0100)]
Merge commit 'v2.6.33' into perf/core
Merge reason:
__percpu annotations need the corresponding sparse address
space definition upstream.
Conflicts:
tools/perf/util/probe-event.c (trivial)
Peter Zijlstra [Fri, 26 Feb 2010 16:07:35 +0000 (17:07 +0100)]
perf_event, amd: Fix spinlock initialization
Avoid kernels from exploding on AMD machines when they have any
lock debugging bits enabled.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Peter Zijlstra [Fri, 26 Feb 2010 15:36:23 +0000 (16:36 +0100)]
perf_event: Fix preempt warning in perf_clock()
A recent commit introduced a preemption warning for
perf_clock(), use raw_smp_processor_id() to avoid this, it
really doesn't matter which cpu we use here.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <
1267198583.22519.684.camel@laptop>
Cc: <stable@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
David S. Miller [Fri, 26 Feb 2010 15:08:34 +0000 (12:08 -0300)]
perf tools: Flush maps on COMM events
Even though we don't register the counters until the child is right about
to exec(), we're still going to get at least a few events while the
fork()'d child is still executing 'perf' and in particular we're going to
get the MMAP events.
We can't distinguish the ones in the newly executed process because the
PID will be the same.
One way to solve this would be to have a PERF_RECORD_EXEC event, and when
this is seen 'perf' can flush it's map cache. We can't use
PERF_RECORD_COMM since that's generated by other things, not just exec().
Actually, thinking about it some more, using PERF_RECORD_COMM might be a
good enough approximation.
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <
1267196914-16238-1-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Peter Zijlstra [Fri, 26 Feb 2010 11:05:05 +0000 (12:05 +0100)]
perf_events, x86: Split PMU definitions into separate files
Split amd,p6,intel into separate files so that we can easily deal with
CONFIG_CPU_SUP_* things, needed to make things build now that perf_event.c
relies on symbols from amd.c
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Arnaldo Carvalho de Melo [Fri, 26 Feb 2010 14:23:14 +0000 (11:23 -0300)]
perf annotate: Handle samples not at objdump output addr boundaries
Without this patch we get this for need_resched:
[root@mica ~]# perf annotate need_resched
------------------------------------------------
Percent | Source code & Disassembly of vmlinux
------------------------------------------------
:
:
: Disassembly of section .text:
:
:
ffffffff810095ed <need_resched>:
: return (state & TASK_INTERRUPTIBLE) || __fatal_signal_pending(p);
: }
:
: static inline int need_resched(void)
: {
0.00 :
ffffffff810095ed: 55 push %rbp
: return unlikely(test_thread_flag(TIF_NEED_RESCHED));
0.00 :
ffffffff810095ee: be 03 00 00 00 mov $0x3,%esi
:
: static inline struct thread_info *current_thread_info(void)
: {
: struct thread_info *ti;
: ti = (void *)(percpu_read_stable(kernel_stack) +
0.00 :
ffffffff810095f3: 65 48 8b 3c 25 48 b5 mov %gs:0xb548,%rdi
0.00 :
ffffffff810095fa: 00 00
: return (state & TASK_INTERRUPTIBLE) || __fatal_signal_pending(p);
: }
:
: static inline int need_resched(void)
: {
0.00 :
ffffffff810095fc: 48 89 e5 mov %rsp,%rbp
: return unlikely(test_thread_flag(TIF_NEED_RESCHED));
0.00 :
ffffffff810095ff: 48 81 ef d8 1f 00 00 sub $0x1fd8,%rdi
0.00 :
ffffffff81009606: e8 9d ff ff ff callq
ffffffff810095a8 <test_ti_thread_flag>
: }
0.00 :
ffffffff8100960b: c9 leaveq
0.00 :
ffffffff8100960c: 85 c0 test %eax,%eax
0.00 :
ffffffff8100960e: 0f 95 c0 setne %al
0.00 :
ffffffff81009611: 0f b6 c0 movzbl %al,%eax
: Disassembly of section .vsyscall_0:
: Disassembly of section .vsyscall_fn:
: Disassembly of section .vsyscall_1:
: Disassembly of section .vsyscall_2:
: Disassembly of section .init.text:
: Disassembly of section .altinstr_replacement:
: Disassembly of section .exit.text:
[root@mica ~]#
But from the 'perf report' result we know that there are hits
for need_resched on a 4 way machine mostly doing nothing, so
after adding code to show what is in each hist offset and
collapsing IP hits for what happens between objdump lines we
get, for the same perf.data file:
[root@mica ~]# perf annotate -v need_resched
------------------------------------------------
Percent | Source code & Disassembly of vmlinux
------------------------------------------------
:
:
: Disassembly of section .text:
:
:
ffffffff810095ed <need_resched>:
: return (state & TASK_INTERRUPTIBLE) || __fatal_signal_pending(p);
: }
:
: static inline int need_resched(void)
: {
0.00 :
ffffffff810095ed: 55 push %rbp
: return unlikely(test_thread_flag(TIF_NEED_RESCHED));
52.78 :
ffffffff810095ee: be 03 00 00 00 mov $0x3,%esi
:
: static inline struct thread_info *current_thread_info(void)
: {
: struct thread_info *ti;
: ti = (void *)(percpu_read_stable(kernel_stack) +
0.00 :
ffffffff810095f3: 65 48 8b 3c 25 48 b5 mov %gs:0xb548,%rdi
0.00 :
ffffffff810095fa: 00 00
: return (state & TASK_INTERRUPTIBLE) || __fatal_signal_pending(p);
: }
:
: static inline int need_resched(void)
: {
0.00 :
ffffffff810095fc: 48 89 e5 mov %rsp,%rbp
: return unlikely(test_thread_flag(TIF_NEED_RESCHED));
9.72 :
ffffffff810095ff: 48 81 ef d8 1f 00 00 sub $0x1fd8,%rdi
0.00 :
ffffffff81009606: e8 9d ff ff ff callq
ffffffff810095a8 <test_ti_thread_flag>
: }
0.00 :
ffffffff8100960b: c9 leaveq
0.00 :
ffffffff8100960c: 85 c0 test %eax,%eax
37.50 :
ffffffff8100960e: 0f 95 c0 setne %al
0.00 :
ffffffff81009611: 0f b6 c0 movzbl %al,%eax
: Disassembly of section .vsyscall_0:
: Disassembly of section .vsyscall_fn:
: Disassembly of section .vsyscall_1:
: Disassembly of section .vsyscall_2:
: Disassembly of section .init.text:
: Disassembly of section .altinstr_replacement:
: Disassembly of section .exit.text:
[root@mica ~]#
And now 'perf annotate -v', verbose mode, will show the hits per
precise IP, so that one can make sense of the attribution to
each objdumop line:
[root@mica ~]# perf annotate -v need_resched
Looking at the vmlinux_path (5 entries long)
Using /lib/modules/
2.6.33-rc8-tip-00784-g3471df5-dirty/build/vmlinux
for symbols annotate_sym: filename=/lib/modules/
2.6.33-rc8-tip-00784-g3471df5-dirty/build/vmlinux, sym=need_resched, start=0xffffffff810095ed, end=0xffffffff81009614
------------------------------------------------
Percent | Source code & Disassembly of vmlinux
------------------------------------------------
ffffffff810095f1: 152
ffffffff81009603: 28
ffffffff8100960f: 55
ffffffff81009610: 53
h->sum: 288
<SNIP same annotation>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: David Miller <davem@davemloft.net>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <
1267194194-15670-1-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Robert Richter [Fri, 26 Feb 2010 12:45:24 +0000 (13:45 +0100)]
oprofile/x86: fix msr access to reserved counters
During switching virtual counters there is access to perfctr msrs. If
the counter is not available this fails due to an invalid
address. This patch fixes this.
Cc: stable@kernel.org
Signed-off-by: Robert Richter <robert.richter@amd.com>
Robert Richter [Thu, 25 Feb 2010 19:20:25 +0000 (20:20 +0100)]
oprofile/x86: use kzalloc() instead of kmalloc()
Cc: stable@kernel.org
Signed-off-by: Robert Richter <robert.richter@amd.com>
Robert Richter [Thu, 25 Feb 2010 18:16:46 +0000 (19:16 +0100)]
oprofile/x86: fix perfctr nmi reservation for mulitplexing
Multiple virtual counters share one physical counter. The reservation
of virtual counters fails due to duplicate allocation of the same
counter. The counters are already reserved. Thus, virtual counter
reservation may removed at all. This also makes the code easier.
Cc: stable@kernel.org
Signed-off-by: Robert Richter <robert.richter@amd.com>
Naga Chumbalkar [Tue, 23 Feb 2010 17:14:58 +0000 (18:14 +0100)]
oprofile/x86: add comment to counter-in-use warning
Currently, oprofile fails silently on platforms where a non-OS entity
such as the system firmware "enables" and uses a performance
counter. There is a warning in the code for this case.
The warning indicates an already running counter. If oprofile doesn't
collect data, then try using a different performance counter on your
platform to monitor the desired event. Delete the counter from the
desired event by editing the
/usr/share/oprofile/<cpu_type>/<cpu>/events
file. If the event cannot be monitored by any other counter, contact
your hardware or BIOS vendor.
Cc: Shashi Belur <shashi-kiran.belur@hp.com>
Cc: Tony Jones <tonyj@suse.de>
Signed-off-by: Naga Chumbalkar <nagananda.chumbalkar@hp.com>
Signed-off-by: Robert Richter <robert.richter@amd.com>
Robert Richter [Tue, 23 Feb 2010 17:14:58 +0000 (18:14 +0100)]
oprofile/x86: warn user if a counter is already active
This patch generates a warning if a counter is already active.
Implemented for AMD and P6 models. P4 is not supported.
Cc: Naga Chumbalkar <nagananda.chumbalkar@hp.com>
Cc: Shashi Belur <shashi-kiran.belur@hp.com>
Cc: Tony Jones <tonyj@suse.de>
Signed-off-by: Robert Richter <robert.richter@amd.com>
Robert Richter [Tue, 23 Feb 2010 14:46:49 +0000 (15:46 +0100)]
oprofile/x86: implement randomization for IBS periodic op counter
IBS selects an op (execution operation) for sampling by counting
either cycles or dispatched ops. Better statistical samples can be
produced by adding a software generated random offset to the periodic
op counter value with each sample.
This patch adds software randomization to the IBS periodic op
counter. The lower 12 bits of the 20 bit counter are
randomized. IbsOpCurCnt is initialized with a 12 bit random value.
There is a work around if the hw can not write to IbsOpCurCnt. Then
the lower 8 bits of the 16 bit IbsOpMaxCnt [15:0] value are randomized
in the range of -128 to +127 by adding/subtracting an offset to the
maximum count (IbsOpMaxCnt).
The linear feedback shift register (LFSR) algorithm is used for
pseudo-random number generation to have low impact to the memory
system.
Signed-off-by: Robert Richter <robert.richter@amd.com>
Suravee Suthikulpanit [Mon, 18 Jan 2010 17:25:45 +0000 (11:25 -0600)]
oprofile/x86: implement lsfr pseudo-random number generator for IBS
This patch implements a linear feedback shift register (LFSR) for
pseudo-random number generation for IBS.
For IBS measurements it would be good to minimize memory traffic in
the interrupt handler since every access pollutes the data
caches. Computing a maximal period LFSR just needs shifts and ORs.
The LFSR method is good enough to randomize the ops at low
overhead. 16 pseudo-random bits are enough for the implementation and
it doesn't matter that the pattern repeats with a fairly short
cycle. It only needs to break up (hard) periodic sampling behavior.
The logic was designed by Paul Drongowski.
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Robert Richter <robert.richter@amd.com>
Robert Richter [Thu, 4 Feb 2010 09:57:23 +0000 (10:57 +0100)]
oprofile/x86: implement IBS cpuid feature detection
This patch adds IBS feature detection using cpuid flags. An IBS
capability mask is introduced to test for certain IBS features. The
bit mask is the same as for IBS cpuid feature flags (Fn8000_001B_EAX),
but bit 0 is used to indicate the existence of IBS.
The patch also changes the handling of the IbsOpCntCtl bit (periodic
op counter count control). The oprofilefs file for this feature
(ibs_op/dispatched_ops) will be only exposed if the feature is
available, also the default for the bit is set to count clock cycles.
In general, the userland can detect the availability of a feature by
checking for the corresponding file in oprofilefs. If it exists, the
feature also exists. This may lead to a dynamic file layout depending
on the cpu type with that the userland has to deal with. Current
opcontrol is compatible.
Signed-off-by: Robert Richter <robert.richter@amd.com>
Robert Richter [Thu, 28 Jan 2010 15:50:45 +0000 (16:50 +0100)]
oprofile/x86: remove node check in AMD IBS initialization
Standard AMD systems have the same number of nodes as there are
northbridge devices. However, there may kernel configurations
(especially for 32 bit) or system setups exist, where the node number
is different or it can not be detected properly. Thus the check is not
reliable and may fail though IBS setup was fine. For this reason it is
better to remove the check.
Cc: stable <stable@kernel.org>
Signed-off-by: Robert Richter <robert.richter@amd.com>
Robert Richter [Thu, 28 Jan 2010 17:05:26 +0000 (18:05 +0100)]
oprofile/x86: remove OPROFILE_IBS config option
OProfile support for IBS is now for several versions in the
kernel. The feature is stable now and the code can be activated
permanently.
As a side effect IBS now works also on nosmp configs.
Signed-off-by: Robert Richter <robert.richter@amd.com>
Robert Richter [Fri, 26 Feb 2010 14:01:23 +0000 (15:01 +0100)]
oprofile: remove EXPERIMENTAL from the config option description
OProfile is already used for a long time and no longer experimental.
Signed-off-by: Robert Richter <robert.richter@amd.com>
Robert Richter [Wed, 10 Feb 2010 09:03:34 +0000 (10:03 +0100)]
oprofile: remove tracing build dependency
The commit
1155de4 ring-buffer: Make it generally available
already made ring-buffer available without the TRACING option
enabled. This patch removes the TRACING dependency from oprofile.
Fixes also oprofile configuration on ia64.
The patch also applies to the 2.6.32-stable kernel.
Reported-by: Tony Jones <tonyj@suse.de>
Cc: stable@kernel.org
Signed-off-by: Robert Richter <robert.richter@amd.com>
Peter Zijlstra [Wed, 10 Feb 2010 15:10:48 +0000 (16:10 +0100)]
perf_events, x86: Remove superflous MSR writes
We re-program the event control register every time we reset the count,
this appears to be superflous, hence remove it.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arjan van de Ven <arjan@linux.intel.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Peter Zijlstra [Thu, 11 Feb 2010 12:21:58 +0000 (13:21 +0100)]
perf_events: Simplify code by removing cpu argument to hw_perf_group_sched_in()
Since the cpu argument to hw_perf_group_sched_in() is always
smp_processor_id(), simplify the code a little by removing this argument
and using the current cpu where needed.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: David Miller <davem@davemloft.net>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <
1265890918.5396.3.camel@laptop>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Stephane Eranian [Mon, 8 Feb 2010 15:17:01 +0000 (17:17 +0200)]
perf_events, x86: AMD event scheduling
This patch adds correct AMD NorthBridge event scheduling.
NB events are events measuring L3 cache, Hypertransport traffic. They are
identified by an event code >= 0xe0. They measure events on the
Northbride which is shared by all cores on a package. NB events are
counted on a shared set of counters. When a NB event is programmed in a
counter, the data actually comes from a shared counter. Thus, access to
those counters needs to be synchronized.
We implement the synchronization such that no two cores can be measuring
NB events using the same counters. Thus, we maintain a per-NB allocation
table. The available slot is propagated using the event_constraint
structure.
Signed-off-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <
4b703957.
0702d00a.6bf2.7b7d@mx.google.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Stephane Eranian [Mon, 8 Feb 2010 15:06:01 +0000 (17:06 +0200)]
perf_events: Add new start/stop PMU callbacks
In certain situations, the kernel may need to stop and start the same
event rapidly. The current PMU callbacks do not distinguish between stop
and release (i.e., stop + free the resource). Thus, a counter may be
released, then it will be immediately re-acquired. Event scheduling will
again take place with no guarantee to assign the same counter. On some
processors, this may event yield to failure to assign the event back due
to competion between cores.
This patch is adding a new pair of callback to stop and restart a counter
without actually release the underlying counter resource. On stop, the
counter is stopped, its values saved and that's it. On start, the value
is reloaded and counter is restarted (on x86, actual restart is delayed
until perf_enable()).
Signed-off-by: Stephane Eranian <eranian@google.com>
[ added fallback to ->enable/->disable for all other PMUs
fixed x86_pmu_start() to call x86_pmu.enable()
merged __x86_pmu_disable into x86_pmu_stop() ]
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <
4b703875.
0a04d00a.7896.
ffffb824@mx.google.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Peter Zijlstra [Fri, 26 Feb 2010 09:33:41 +0000 (10:33 +0100)]
perf_events: Report the MMAP pgoff value in bytes
DaveM reported that currently perf interprets the pgoff value reported by
the MMAP events as a byte range, but the kernel reports it as a page
offset.
Since its broken (and unusable) anyway, change the kernel behaviour (ABI)
to report bytes indeed, avoiding the need for userspace to deal with
PAGE_SIZE things.
Reported-by: David Miller <davem@davemloft.net>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Arnaldo Carvalho de Melo [Thu, 25 Feb 2010 15:57:40 +0000 (12:57 -0300)]
perf annotate: Defer allocating sym_priv->hist array
Because symbol->end is not fixed up at symbol_filter time, only
after all symbols for a DSO are loaded, and that, for asm
symbols, may be bogus, causing segfaults when hits happen in
these symbols.
Reported-by: David Miller <davem@davemloft.net>
Reported-by: Anton Blanchard <anton@samba.org>
Acked-by: David Miller <davem@davemloft.net>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: <stable@kernel.org> # for .33.x. Does not apply cleanly, needs backport.
LKML-Reference: <
20100225155740.GB8553@ghostprotocols.net>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Arnaldo Carvalho de Melo [Mon, 22 Feb 2010 19:15:39 +0000 (16:15 -0300)]
perf symbols: Improve debugging information about symtab origins
Be more clear about DSO long names and tell from which file
kernel symbols were obtained, all in --verbose mode:
[root@mica ~]# perf report -v > /dev/null
Looking at the vmlinux_path (5 entries long)
Using /lib/modules/
2.6.33-rc8-tip-00777-g0918527-dirty/build/vmlinux for symbols
[root@mica ~]# mv /lib/modules/
2.6.33-rc8-tip-00777-g0918527-dirty/build/vmlinux /tmp/dd
[root@mica ~]# perf report -v > /dev/null
Looking at the vmlinux_path (5 entries long)
Using /proc/kallsyms for symbols
[root@mica ~]#
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <
1266866139-6361-1-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Arnaldo Carvalho de Melo [Mon, 22 Feb 2010 19:14:22 +0000 (16:14 -0300)]
perf top: Use a macro instead of a constant variable
To overcome a silly gcc warning:
cc1: warnings being treated as errors
builtin-top.c: In function ‘lookup_sym_source’:
builtin-top.c:291: warning: not protecting local variables:
variable length buffer make: *** [builtin-top.o] Error 1
make: *** Waiting for unfinished jobs....
That is emitted for this:
const size_t pattern_len = BITS_PER_LONG / 4 + 2;
char pattern[pattern_len + 1];
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <
1266866062-6287-1-git-send-email-acme@infradead.org>
[ -v2: macroify the naming style ]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Zhang, Yanmin [Thu, 25 Feb 2010 03:00:51 +0000 (11:00 +0800)]
perf symbols: Check the right return variable
In function dso__split_kallsyms(), curr_map saves the return value
of map__new2. So check it instead of var map after the call returns.
Signed-off-by: Zhang Yanmin <yanmin_zhang@linux.intel.com>
Acked-by: David S. Miller <davem@davemloft.net>
Cc: <stable@kernel.org> # for .33.x
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <
1267066851.1726.9.camel@localhost>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Frederic Weisbecker [Thu, 25 Feb 2010 02:03:52 +0000 (03:03 +0100)]
perf/scripts: Tag syscall_name helper as not yet available
syscall_name() helper, which resolves a syscall arch number to
its name, is not yet available as we first need to implement
event injection for it to work.
Remove it from the documentation or tag its references as
unavailable yet. Once it's implemented, we can just revert
the current patch.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Keiichi KII <k-keiichi@bx.jp.nec.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Tom Zanussi [Wed, 27 Jan 2010 08:28:03 +0000 (02:28 -0600)]
perf/scripts: Add perf-trace-python Documentation
Also small update to perf-trace-perl and perf-trace docs.
Signed-off-by: Tom Zanussi <tzanussi@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Keiichi KII <k-keiichi@bx.jp.nec.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <
1264580883-15324-13-git-send-email-tzanussi@gmail.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Tom Zanussi [Mon, 22 Feb 2010 07:12:59 +0000 (01:12 -0600)]
perf/scripts: Remove unnecessary PyTuple resizes
If we know the size of a tuple in advance, there's no need to resize
it - start out with the known size in the first place.
Signed-off-by: Tom Zanussi <tzanussi@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Keiichi KII <k-keiichi@bx.jp.nec.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <
1266822779.6426.4.camel@tropicana>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Tom Zanussi [Wed, 27 Jan 2010 08:27:58 +0000 (02:27 -0600)]
perf/scripts: Add syscall tracing scripts
Adds a set of scripts that aggregate system call totals and system
call errors. Most are Python scripts that also test basic
functionality of the new Python engine, but there's also one Perl
script added for comparison and for reference in some new
Documentation contained in a later patch.
Signed-off-by: Tom Zanussi <tzanussi@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Keiichi KII <k-keiichi@bx.jp.nec.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <
1264580883-15324-8-git-send-email-tzanussi@gmail.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Tom Zanussi [Wed, 27 Jan 2010 08:27:57 +0000 (02:27 -0600)]
perf/scripts: Add Python scripting engine
Add base support for Python scripting to perf trace.
Signed-off-by: Tom Zanussi <tzanussi@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Keiichi KII <k-keiichi@bx.jp.nec.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <
1264580883-15324-6-git-send-email-tzanussi@gmail.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Linus Torvalds [Wed, 24 Feb 2010 18:52:17 +0000 (10:52 -0800)]
Linux 2.6.33
Linus Torvalds [Wed, 24 Feb 2010 18:51:21 +0000 (10:51 -0800)]
Merge branch 'urgent' of git://git./linux/kernel/git/kyle/parisc-2.6
* 'urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/kyle/parisc-2.6:
parisc: Set PCI CLS early in boot.
Linus Torvalds [Wed, 24 Feb 2010 18:51:04 +0000 (10:51 -0800)]
Merge branch 'release' of git://git./linux/kernel/git/aegl/linux-2.6
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6:
[IA64] Fix broken sn2 build
Carlos O'Donell [Mon, 22 Feb 2010 23:25:59 +0000 (23:25 +0000)]
parisc: Set PCI CLS early in boot.
Set the PCI CLS early in the boot process to prevent
device failures. In pcibios_set_master use the new
pci_cache_line_size instead of a hard-coded value.
Signed-off-by: Carlos O'Donell <carlos@codesourcery.com>
Reviewed-by: Grant Grundler <grundler@google.com>
Signed-off-by: Kyle McMartin <kyle@redhat.com>
Linus Torvalds [Wed, 24 Feb 2010 15:43:02 +0000 (07:43 -0800)]
Merge branch 'for-linus' of git://git.monstr.eu/linux-2.6-microblaze
* 'for-linus' of git://git.monstr.eu/linux-2.6-microblaze:
microblaze: Fix out_le32() macro
microblaze: Fix cache loop function for cache range
Linus Torvalds [Wed, 24 Feb 2010 15:42:42 +0000 (07:42 -0800)]
Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block
* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
Revert "block: improve queue_should_plug() by looking at IO depths"
Steven J. Magnani [Mon, 22 Feb 2010 15:25:42 +0000 (09:25 -0600)]
microblaze: Fix out_le32() macro
Trailing semicolon causes compilation involving out_le32() to fail.
Signed-off-by: Steven J. Magnani <steve@digidescorp.com>
Signed-off-by: Michal Simek <monstr@monstr.eu>
Michal Simek [Mon, 15 Feb 2010 09:50:42 +0000 (10:50 +0100)]
microblaze: Fix cache loop function for cache range
I create wrong asm code but none test shows that this part of code is wrong.
I am not convinces that were good idea to create asm optimized macros
for caches. The reason is that there is not optimization with previous code
that's why make sense to add old code and do some benchmarking which
functions are faster.
Signed-off-by: Michal Simek <monstr@monstr.eu>
Linus Torvalds [Wed, 24 Feb 2010 03:44:07 +0000 (19:44 -0800)]
Merge git://git./linux/kernel/git/davem/net-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6:
net: bug fix for vlan + gro issue
tc35815: Remove a wrong netif_wake_queue() call which triggers BUG_ON
cdc_ether: new PID for Ericsson C3607w to the whitelist (resubmit)
IPv6: better document max_addresses parameter
MAINTAINERS: update mv643xx_eth maintenance status
e1000: Fix DMA mapping error handling on RX
iwlwifi: sanity check before counting number of tfds can be free
iwlwifi: error checking for number of tfds in queue
iwlwifi: set HT flags after channel in rxon
Ajit Khaparde [Tue, 16 Feb 2010 20:25:43 +0000 (20:25 +0000)]
net: bug fix for vlan + gro issue
Traffic (tcp) doesnot start on a vlan interface when gro is enabled.
Even the tcp handshake was not taking place.
This is because, the eth_type_trans call before the netif_receive_skb
in napi_gro_finish() resets the skb->dev to napi->dev from the previously
set vlan netdev interface. This causes the ip_route_input to drop the
incoming packet considering it as a packet coming from a martian source.
I could repro this on 2.6.32.7 (stable) and 2.6.33-rc7.
With this fix, the traffic starts and the test runs fine on both vlan
and non-vlan interfaces.
CC: Herbert Xu <herbert@gondor.apana.org.au>
CC: Patrick McHardy <kaber@trash.net>
Signed-off-by: Ajit Khaparde <ajitk@serverengines.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Linus Torvalds [Wed, 24 Feb 2010 02:15:05 +0000 (18:15 -0800)]
Merge branch 'release' of git://git./linux/kernel/git/lenb/linux-acpi-2.6
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6:
ACPI: Be in TS_POLLING state during mwait based C-state entry
ACPI: Fix regression where _PPC is not read at boot even when ignore_ppc=0
acer-wmi: Respect current backlight level when loading
Linus Torvalds [Wed, 24 Feb 2010 02:13:34 +0000 (18:13 -0800)]
Merge branch 'drm-linus' of git://git./linux/kernel/git/airlied/drm-2.6
* 'drm-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6:
drm/vmwgfx: Fix queries if no dma buffer thrashing is occuring.
drm/nv50: fix vram ptes on IGPs to point at stolen system memory
drm/nv50: fix instmem binding on IGPs to point at stolen system memory
drm/nv50: improve vram page table construction
drm/nv50: more efficient clearing of gpu page table entries
drm/nv50: make nv50_mem_vm_{bind,unbind} operate only on vram
drm/nouveau: Fix up pre-nv17 analog load detection.
Hedi Berriche [Tue, 23 Feb 2010 23:58:49 +0000 (23:58 +0000)]
[IA64] Fix broken sn2 build
Revert the change made to arch/ia64/sn/kernel/setup.c by commit
204fba4aa303ea4a7bb726a539bf4a5b9e3203d0 as it breaks the build.
Fixing the build the
b94b08081fcecf83fa690d6c5664f6316fe72208 way
breaks xpc because genksyms then fails to generate an CRC for
per_cpu____sn_cnodeid_to_nasid because of limitations in the
generic genksyms code.
Signed-off-by: Hedi Berriche <hedi@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Tom Zanussi [Wed, 27 Jan 2010 08:27:56 +0000 (02:27 -0600)]
perf/scripts: Remove check-perf-trace from listed scripts
The check-perf-trace script only checks Perl functionality, and
doesn't really need to be listed as as user script anyway.
This only removes the '-report' shell script, so although it doesn't
appear in the listing, the '-record' shell script and the check perf
trace perl script itself is still available and can still be run
manually as such:
$ libexec/perf-core/scripts/perl/bin/check-perf-trace-record
$ perf trace -s libexec/perf-core/scripts/perl/check-perf-trace.pl
Signed-off-by: Tom Zanussi <tzanussi@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Keiichi KII <k-keiichi@bx.jp.nec.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <
1264580883-15324-6-git-send-email-tzanussi@gmail.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Tom Zanussi [Wed, 27 Jan 2010 08:27:55 +0000 (02:27 -0600)]
perf/scripts: Move Perl scripting files to scripting-engines dir
Create a scripting-engines directory to contain scripting engine
implementation code, in anticipation of the addition of new scripting
support. Also removes trace-event-perl.h.
Signed-off-by: Tom Zanussi <tzanussi@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Keiichi KII <k-keiichi@bx.jp.nec.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <
1264580883-15324-5-git-send-email-tzanussi@gmail.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Tom Zanussi [Wed, 27 Jan 2010 08:27:54 +0000 (02:27 -0600)]
perf/scripts: Move common code out of Perl-specific files
This stuff is needed by all scripting engines; move it from the Perl
engine source to a more common place.
Signed-off-by: Tom Zanussi <tzanussi@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Keiichi KII <k-keiichi@bx.jp.nec.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <
1264580883-15324-4-git-send-email-tzanussi@gmail.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Tom Zanussi [Wed, 27 Jan 2010 08:27:53 +0000 (02:27 -0600)]
perf/scripts: Fix bug in Util.pm
Fix bogus calculation.
Signed-off-by: Tom Zanussi <tzanussi@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Keiichi KII <k-keiichi@bx.jp.nec.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <
1264580883-15324-3-git-send-email-tzanussi@gmail.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Tom Zanussi [Wed, 27 Jan 2010 08:27:52 +0000 (02:27 -0600)]
perf/scripts: Fix supported language listing option
'perf trace -s list' prints a list of the supported scripting
languages. One problem with it is that it falls through and prints
the trace as well. The use of 'list' for this also makes it easy to
confuse with 'perf trace -l', used for listing available scripts. So
change 'perf trace -s list' to 'perf trace -s lang' and fixes the
fall-through problem.
Signed-off-by: Tom Zanussi <tzanussi@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Keiichi KII <k-keiichi@bx.jp.nec.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <
1264580883-15324-2-git-send-email-tzanussi@gmail.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
David S. Miller [Tue, 23 Feb 2010 09:27:05 +0000 (01:27 -0800)]
Merge branch 'master' of git://git./linux/kernel/git/linville/wireless-2.6
Atsushi Nemoto [Fri, 19 Feb 2010 05:13:58 +0000 (05:13 +0000)]
tc35815: Remove a wrong netif_wake_queue() call which triggers BUG_ON
The netif_wake_queue() is called correctly (i.e. only on !txfull
condition) from txdone routine. So Unconditional call to the
netif_wake_queue() here is wrong. This might cause calling of
start_xmit routine on txfull state and trigger BUG_ON.
This bug does not happen when NAPI disabled. After txdone there
must be at least one free tx slot. But with NAPI, this is not
true anymore and the BUG_ON can hits on heavy load.
In this driver NAPI was enabled on 2.6.33-rc1 so this is
regression from 2.6.32 kernel.
Reported-by: Ralf Roesch <ralf.roesch@rw-gmbh.de>
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: David S. Miller <davem@davemloft.net>
Torgny Johansson [Fri, 19 Feb 2010 01:59:15 +0000 (01:59 +0000)]
cdc_ether: new PID for Ericsson C3607w to the whitelist (resubmit)
This patch adds a new vid/pid to the cdc_ether whitelist.
Device added:
- Ericsson Mobile Broadband variant C3607w
Signed-off-by: Torgny Johansson <torgny.johansson@gmail.com>
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Signed-off-by: David S. Miller <davem@davemloft.net>
Brian Haley [Mon, 22 Feb 2010 12:27:21 +0000 (12:27 +0000)]
IPv6: better document max_addresses parameter
Andrew Morton wrote:
>> >From ip-sysctl.txt file in kernel documentation I can see following description
>> for max_addresses:
>> max_addresses - INTEGER
>> Number of maximum addresses per interface. 0 disables limitation.
>> It is recommended not set too large value (or 0) because it would
>> be too easy way to crash kernel to allow to create too much of
>> autoconfigured addresses.
^^^^^^^^^^^^^^
>> If this parameter applies only for auto-configured IP addressed, please state
>> it more clearly in docs or rename the parameter to show that it refers to
>> auto-configuration.
It did mention autoconfigured in the text, but the below makes it more obvious.
More clearly document IPv6 max_addresses parameter.
Signed-off-by: Brian Haley <brian.haley@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Lennert Buytenhek [Mon, 22 Feb 2010 22:34:54 +0000 (22:34 +0000)]
MAINTAINERS: update mv643xx_eth maintenance status
I am no longer with Marvell.
Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Anton Blanchard [Fri, 19 Feb 2010 17:54:53 +0000 (17:54 +0000)]
e1000: Fix DMA mapping error handling on RX
Check for error return from pci_map_single/pci_map_page and clean up.
With this and the previous patch the driver was able to handle a significant
percentage of errors (I set the fault injection rate to 10% and could still
download large files at a reasonable speed).
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Jens Axboe [Tue, 23 Feb 2010 07:40:43 +0000 (08:40 +0100)]
Revert "block: improve queue_should_plug() by looking at IO depths"
This reverts commit
fb1e75389bd06fd5987e9cda1b4e0305c782f854.
"Benjamin S." <sbenni@gmx.de> reports that the patch in question
causes a big drop in sequential throughput for him, dropping from
200MB/sec down to only 70MB/sec.
Needs to be investigated more fully, for now lets just revert the
offending commit.
Conflicts:
include/linux/blkdev.h
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Thomas Hellstrom [Sun, 21 Feb 2010 14:54:55 +0000 (14:54 +0000)]
drm/vmwgfx: Fix queries if no dma buffer thrashing is occuring.
Intercept query commands and apply relocations to their guest pointers.
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Dave Airlie [Tue, 23 Feb 2010 05:42:18 +0000 (15:42 +1000)]
Merge remote branch 'nouveau/for-airlied' of ../drm-nouveau-next into drm-linus
* 'nouveau/for-airlied' of ../drm-nouveau-next:
drm/nv50: fix vram ptes on IGPs to point at stolen system memory
drm/nv50: fix instmem binding on IGPs to point at stolen system memory
drm/nv50: improve vram page table construction
drm/nv50: more efficient clearing of gpu page table entries
drm/nv50: make nv50_mem_vm_{bind,unbind} operate only on vram
drm/nouveau: Fix up pre-nv17 analog load detection.
Len Brown [Tue, 23 Feb 2010 05:39:00 +0000 (00:39 -0500)]
Merge branch 'pcc' into release
Len Brown [Tue, 23 Feb 2010 05:19:48 +0000 (00:19 -0500)]
Merge branches 'bugzilla-14207' and 'idle' into release
Linus Torvalds [Tue, 23 Feb 2010 03:51:39 +0000 (19:51 -0800)]
Merge branch 'upstream' of git://ftp.linux-mips.org/upstream-linus
* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus:
MIPS: BCM47xx: Fix 128MB RAM support
MIPS: Highmem: Fix build error
Linus Torvalds [Tue, 23 Feb 2010 03:51:13 +0000 (19:51 -0800)]
Merge branch 'parisc/tracehook' of git://git./linux/kernel/git/frob/linux-2.6-roland
* 'parisc/tracehook' of git://git.kernel.org/pub/scm/linux/kernel/git/frob/linux-2.6-roland:
Revert "parisc: HAVE_ARCH_TRACEHOOK"
Michael Neuling [Mon, 22 Feb 2010 20:44:24 +0000 (12:44 -0800)]
fs/exec.c: fix initial stack reservation
803bf5ec259941936262d10ecc84511b76a20921 ("fs/exec.c: restrict initial
stack space expansion to rlimit") attempts to limit the initial stack to
20*PAGE_SIZE. Unfortunately, in attempting ensure the stack is not
reduced in size, we ended up not changing the stack at all.
This size reduction check is not necessary as the expand_stack call does
this already.
This caused a regression in UML resulting in most guest processes being
killed.
Signed-off-by: Michael Neuling <mikey@neuling.org>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Acked-by: WANG Cong <xiyou.wangcong@gmail.com>
Cc: Anton Blanchard <anton@samba.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: James Morris <jmorris@namei.org>
Cc: Serge Hallyn <serue@us.ibm.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Jouni Malinen <j@w1.fi>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Marcin Slusarz [Mon, 22 Feb 2010 20:44:22 +0000 (12:44 -0800)]
efifb: fix framebuffer handoff
Commit
4410f3910947dcea8672280b3adecd53cec4e85e ("fbdev: add support for
handoff from firmware to hw framebuffers") didn't add fb_destroy
operation to efifb. Fix it and change aperture_size to match size
passed to request_mem_region.
Addresses http://bugzilla.kernel.org/show_bug.cgi?id=15151
Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Reported-by: Alex Zhavnerchik <alex.vizor@gmail.com>
Tested-by: Alex Zhavnerchik <alex.vizor@gmail.com>
Acked-by: Peter Jones <pjones@redhat.com>
Cc: Huang Ying <ying.huang@intel.com>
Cc: Dave Airlie <airlied@redhat.com>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Jens Rottmann [Mon, 22 Feb 2010 20:44:20 +0000 (12:44 -0800)]
geode-mfgpt: restore previous behavior for selecting IRQ
geode-mfgpt: restore previous behavior for selecting IRQ
The MFGPT IRQ used to be, in order of decreasing priority,
* IRQ supplied by the user as a boot-time parameter,
* IRQ previously set by the BIOS or another driver,
* default IRQ given at compile time.
Return to this behavior, which got broken when splitting the
MFGPT/clocksource driver for 2.6.33-rc1.
Signed-off-by: Jens Rottmann <JRottmann@LiPPERTEmbedded.de>
Acked-by: Andres Salomon <dilinger@collabora.co.uk>
Cc: Jordan Crouse <jordan.crouse@amd.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: john stultz <johnstul@us.ibm.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Tejun Heo [Mon, 22 Feb 2010 20:44:19 +0000 (12:44 -0800)]
idr: fix a critical misallocation bug, take#2
This is retry of reverted
859ddf09743a8cc680af33f7259ccd0fd36bfe9d
("idr: fix a critical misallocation bug") which contained two bugs.
* pa[idp->layers] should be cleared even if it's not used by
sub_alloc() because it's used by mark idr_mark_full().
* The original condition check also assigned pa[l] to p which the new
code didn't do thus leaving p pointing at the wrong layer.
Both problems have been fixed and the idr code has received good amount
testing using userland testing setup where simple bitmap allocator is
run parallel to verify the result of idr allocation.
The bug this patch fixes is caused by sub_alloc() optimization path
bypassing out-of-room condition check and restarting allocation loop
with starting value higher than maximum allowed value. For detailed
description, please read commit message of
859ddf09.
Signed-off-by: Tejun Heo <tj@kernel.org>
Based-on-patch-from: Eric Paris <eparis@redhat.com>
Reported-by: Eric Paris <eparis@redhat.com>
Tested-by: Stefan Lippers-Hollmann <s.l-h@gmx.de>
Tested-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Tetsuo Handa [Mon, 22 Feb 2010 20:44:16 +0000 (12:44 -0800)]
kernel/sys.c: fix missing rcu protection for sys_getpriority()
find_task_by_vpid() is not safe without rcu_read_lock(). 2.6.33-rc7 got
RCU protection for sys_setpriority() but missed it for sys_getpriority().
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: "Paul E. McKenney" <paulmck@us.ibm.com>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
KAMEZAWA Hiroyuki [Mon, 22 Feb 2010 20:44:14 +0000 (12:44 -0800)]
memcg: fix oom killing a child process in an other cgroup
Presently the oom-killer is memcg aware and it finds the worst process
from processes under memcg(s) in oom. Then, it kills victim's child
first.
It may kill a child in another cgroup and may not be any help for
recovery. And it will break the assumption users have.
This patch fixes it.
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Reviewed-by: Minchan Kim <minchan.kim@gmail.com>
Cc: Balbir Singh <balbir@linux.vnet.ibm.com>
Reviewed-by: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Acked-by: David Rientjes <rientjes@google.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Ben Skeggs [Fri, 19 Feb 2010 22:10:11 +0000 (08:10 +1000)]
drm/nv50: fix vram ptes on IGPs to point at stolen system memory
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Ben Skeggs [Fri, 19 Feb 2010 22:06:36 +0000 (08:06 +1000)]
drm/nv50: fix instmem binding on IGPs to point at stolen system memory
This also modifies the unused PRAMIN PT entries to be all zeroes, can't
really recall why I used 9/0 initially, just that it didn't work for
some reason. It was likely masking a bug elsewhere that's since been
fixed.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Ben Skeggs [Thu, 11 Feb 2010 01:31:44 +0000 (11:31 +1000)]
drm/nv50: improve vram page table construction
This commit changes nouveau to construct PTEs which look very much like
the ones the binary driver creates.
I presume that filling multiple PTEs identically with length flags and
the physical address of the start of a block of VRAM is a hint to the
memory controller that it need not perform additional page table lookups
for that range of addresses.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Ben Skeggs [Thu, 11 Feb 2010 00:25:53 +0000 (10:25 +1000)]
drm/nv50: more efficient clearing of gpu page table entries
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Ben Skeggs [Thu, 11 Feb 2010 00:23:30 +0000 (10:23 +1000)]
drm/nv50: make nv50_mem_vm_{bind,unbind} operate only on vram
GART is handled elsewhere, no reason to have the code for it here too.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Francisco Jerez [Wed, 10 Feb 2010 18:25:58 +0000 (19:25 +0100)]
drm/nouveau: Fix up pre-nv17 analog load detection.
Signed-off-by: Francisco Jerez <currojerez@riseup.net>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Hauke Mehrtens [Sat, 20 Feb 2010 18:51:20 +0000 (19:51 +0100)]
MIPS: BCM47xx: Fix 128MB RAM support
Ignoring the last page when ddr size is 128M. Cached accesses to last page
is causing the processor to prefetch using address above 128M stepping out
of the DDR address space.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/981/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Yoichi Yuasa [Sat, 20 Feb 2010 12:23:22 +0000 (21:23 +0900)]
MIPS: Highmem: Fix build error
arch/mips/mm/highmem.c: In function 'kmap_init':
arch/mips/mm/highmem.c:130: error: 'init_mm' undeclared (first use in this function)
arch/mips/mm/highmem.c:130: error: (Each undeclared identifier is reported only once
arch/mips/mm/highmem.c:130: error: for each function it appears in.)
Signed-off-by: Yoichi Yuasa <yuasa@linux-mips.org>
Cc: linux-mips <linux-mips@linux-mips.org>
Patchwork: http://patchwork.linux-mips.org/patch/980/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Roland McGrath [Mon, 22 Feb 2010 18:43:43 +0000 (10:43 -0800)]
Revert "parisc: HAVE_ARCH_TRACEHOOK"
This reverts commit
81bf550d9cdfe0325eb1504b06c9f6511b442c1a.
HAVE_ARCH_TRACEHOOK requires defining the user_regset interfaces,
including task_user_regset_view(). parisc doesn't do that yet,
so don't lie about it.
Signed-off-by: Roland McGrath <roland@redhat.com>
Pallipadi, Venkatesh [Wed, 10 Feb 2010 18:35:31 +0000 (10:35 -0800)]
ACPI: Be in TS_POLLING state during mwait based C-state entry
ACPI deep C-state entry had a long standing bug/missing feature, wherein we were sending
resched IPIs when an idle CPU is in mwait based deep C-state. Only mwait based C1 was using
the write to the monitored address to wake up mwait'ing CPU.
This patch changes the code to retain TS_POLLING bit if we are entering an mwait based
deep C-state.
The patch has been verified to reduce the number of resched IPIs in general and also
improves the performance/power on workloads with low system utilization (i.e., when mwait based
deep C-states are being used).
Fixes "netperf ~50% regression with 2.6.33-rc1, bisect to
1b9508f"
http://marc.info/?l=linux-kernel&m=
126441481427331&w=4
Reported-by: Lin Ming <ming.m.lin@intel.com>
Tested-by: Alex Shi <alex.shi@intel.com>
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Linus Torvalds [Mon, 22 Feb 2010 16:55:32 +0000 (08:55 -0800)]
Merge branch 'perf-fixes-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip
* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
perf probe: Init struct probe_point and set counter correctly
hw-breakpoint: Keep track of dr7 local enable bits
hw-breakpoints: Accept breakpoints on NULL address
perf_events: Fix FORK events