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Julia Lawall [Sun, 2 Aug 2009 08:48:08 +0000 (10:48 +0200)]
MIPS: Use DIV_ROUND_CLOSEST
The kernel.h macro DIV_ROUND_CLOSEST performs the computation (x + d/2)/d
but is perhaps more readable.
The semantic patch that makes this change is as follows:
(http://www.emn.fr/x-info/coccinelle/)
// <smpl>
@haskernel@
@@
#include <linux/kernel.h>
@depends on haskernel@
expression x,__divisor;
@@
- (((x) + ((__divisor) / 2)) / (__divisor))
+ DIV_ROUND_CLOSEST(x,__divisor)
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Florian Fainelli [Sat, 1 Aug 2009 21:51:20 +0000 (23:51 +0200)]
MIPS: MTX-1: Request button GPIO before setting its direction
This patch fixes the following warning at boot time:
WARNING: at drivers/gpio/gpiolib.c:83 0x8021d5e0()
autorequest GPIO-207
Modules linked in:
Call Trace:[<
8011e0ec>] 0x8011e0ec
[<
80110a28>] 0x80110a28
[<
80110a28>] 0x80110a28
[..snip..]
The current code does not request the GPIO and attempts
to set its direction, which is a violation of the GPIO API.
This patch also unhardcode the GPIO we request and use
the one we defined in the button driver.
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Florian Fainelli [Fri, 24 Jul 2009 11:19:10 +0000 (13:19 +0200)]
MIPS: AR7: Override CFLAGS with -Werror
Now that we have removed all warnings from the ar7 board code we can use
-Werror like on other MIPS boards.
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Florian Fainelli [Fri, 24 Jul 2009 11:18:42 +0000 (13:18 +0200)]
MIPS: AR7: Remove unused tnetd7200_get_clock function
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Florian Fainelli [Fri, 24 Jul 2009 11:18:16 +0000 (13:18 +0200)]
MIPS: AR7: Use DMA_BIT_MASK(nn) instead of deprecated DMA_nnBIT_MASK
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Florian Fainelli [Fri, 24 Jul 2009 11:24:15 +0000 (13:24 +0200)]
MIPS: AR7: Fix build failures when CONFIG_SERIAL_8250 is not enabled
This patch fixes the following build failure when CONFIG_SERIAL_8250
is not enabled in the kernel configuration:
arch/mips/ar7/built-in.o: In function 'ar7_register_devices':
platform.c:(.init.text+0x61c): undefined reference to 'early_serial_setup'
platform.c:(.init.text+0x61c): relocation truncated to fit: R_MIPS_26 against 'early_serial_setup'
platform.c:(.init.text+0x68c): undefined reference to 'early_serial_setup'
platform.c:(.init.text+0x68c): relocation truncated to fit: R_MIPS_26 against 'early_serial_setup'
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Roel Kluin [Wed, 29 Jul 2009 20:02:53 +0000 (22:02 +0200)]
MIPS: Fix read buffer overflow
Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Florian Fainelli [Tue, 21 Jul 2009 10:38:10 +0000 (12:38 +0200)]
MIPS: AR7: Fix build warning on memory.c
This patch fixes the following build warning:
arch/mips/ar7/memory.c: In function 'memsize':
arch/mips/ar7/memory.c:55: warning: passing argument 1 of 'writel' makes integer from pointer without a cast
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
David Daney [Wed, 15 Jul 2009 01:16:50 +0000 (18:16 -0700)]
MIPS: Octeon PCIe: Make hardware and software bus numbers match.
Some SiliconImage PCIe SATA controlers are not detected when the bus
numbers differ.
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Atsushi Nemoto [Wed, 15 Jul 2009 13:03:56 +0000 (22:03 +0900)]
MIPS: RBTX4939: Fix IOC pin-enable register updating
The rbtx4939_update_ioc_pen() expects txx9_ce_res[] already initialized.
Call it after tx4939_setup().
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Shane McDonald [Sun, 12 Jul 2009 16:42:06 +0000 (10:42 -0600)]
MIPS: Simplify and correct interrupt handling for MSP4200
The current interrupt handling code for the MSP4200 always masks an
interrupt before acknowledging it. This is not required, as that will be
handled by the level interrupt handler. This change simplifies the MSP4200
code to remove the masking in the ack routine, and makes sure that the
minimum required operation is performed for masking and acking, rather
than always both masking and acking the interrupt.
Signed-off-by: Shane McDonald <mcdonald.shane@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Florian Fainelli [Mon, 27 Apr 2009 14:47:23 +0000 (16:47 +0200)]
MIPS: MSPxxxx: define MIPS34K_MISSED_ITLB_WAR for other PMC-Sierra SoC
Trying to build a PMC-Sierra MSP4200 VoIP gateway defconfig will not work
since MIPS34K_MISSED_ITLB_WAR is not defined for all boards supported
within pmc-serria/msp71xx. This patch defines MIPS34K_MISSED_ITLB_WAR to
prevent such build failures:
CHK include/linux/version.h
CHK include/linux/utsrelease.h
SYMLINK include/asm -> include/asm-mips
CC arch/mips/kernel/asm-offsets.s
In file included fromlinux-msp71xx/linux-2.6.29/arch/mips/include/asm/bitops.h:24,
from include/linux/bitops.h:17,
from include/linux/kernel.h:15,
from include/linux/sched.h:52,
from arch/mips/kernel/asm-offsets.c:13:
linux-msp71xx/linux-2.6.29/arch/mips/include/asm/war.h:241:2: error: #error Check setting of MIPS34K_MISSED_ITLB_WAR for your
platform
This fixes a compile error when building for the MSP4200 boards. Identical
patches to fix this were send by
Florian Fainelli <florian@openwrt.org>
Shane McDonald <mcdonald.shane@gmail.com>
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Florian Fainelli [Mon, 27 Apr 2009 14:59:48 +0000 (16:59 +0200)]
MIPS: MSP71xx: fix build failures on msp_irq_slp.c
Trying to build MSP4200 VoIP defconfig also fails on msp_irq_slp.c with a
non-existing reference to mask_slp_irq, which is in turn mask_msp_slp_irq.
Passed that, we will also miss a comma when calling
set_irq_chip_and_handler. This patch fixes both issues.
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Acked-by: Shane McDonald <mcdonald.shane@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Gabor Juhos [Mon, 13 Jul 2009 09:14:24 +0000 (11:14 +0200)]
MIPS: Fix loading of modules with unresolved weak symbols
Loading of modules with unresolved weak symbols fails on MIPS
since '
88173507e4fc1e7ecd111b0565e8cba0cb7dae6d'.
Modules: handle symbols that have a zero value
The module subsystem cannot handle symbols that are zero. If symbols
are present that have a zero value then the module resolver prints out a
message that these symbols are unresolved.
We have to use IS_ERR_VALUE() to check that a symbol has been resolved
or not.
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Kurt Martin [Thu, 9 Jul 2009 02:22:35 +0000 (19:22 -0700)]
MIPS: SMTC: Move cross VPE writes to after a TC is assigned to VPE.
Signed-off-by: Chris Dearman <chris@mips.com>
Signed-off-by: Raghu Gandham <raghu@mips.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Raghu Gandham [Thu, 9 Jul 2009 00:00:44 +0000 (17:00 -0700)]
[PATCH] MIPS: SMTC: Fix compile error
Commit
fc03bc1715ca0ad4ccfe97aab16bcc9e7129c1a4 breaks when SMTC support
is enabled on Malta.
Signed-off-by: Raghu Gandham <raghu@mips.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
David Daney [Wed, 8 Jul 2009 17:07:50 +0000 (10:07 -0700)]
MIPS: Avoid clobbering struct pt_regs in kthreads
The resume() implementation octeon_switch.S examines the saved cp0_status
register. We were clobbering the entire pt_regs structure in kernel
threads leading to random crashes.
When switching away from a kernel thread, the saved cp0_status is examined
and if bit 30 is set it is cleared and the CP2 state saved into the pt_regs
structure. Since the kernel thread stack overlaid the pt_regs structure
this resulted in a corrupt stack. When the kthread with the corrupt stack
was resumed, it could crash if it used any of the data in the stack that was
clobbered.
We fix it by moving the kernel thread stack down so it doesn't overlay
pt_regs.
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Huang Weiyi [Wed, 8 Jul 2009 22:14:37 +0000 (06:14 +0800)]
MIPS: AR7: Remove unused inclusions of <linux/version.h>.
Signed-off-by: Huang Weiyi <weiyi.huang@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Yoichi Yuasa [Wed, 8 Jul 2009 06:08:19 +0000 (15:08 +0900)]
MIPS: MIPSsim: Fix unbalance brace in mipssim get_c0_compare_int()
cc1: warnings being treated as errors
arch/mips/mipssim/sim_time.c: In function 'get_c0_compare_int':
arch/mips/mipssim/sim_time.c:103: warning: ISO C90 forbids mixed declarations and code
arch/mips/mipssim/sim_time.c:116: error: expected declaration or statement at end of input
make[1]: *** [arch/mips/mipssim/sim_time.o] Error 1
Signed-off-by: Yoichi Yuasa <yuasa@linux-mips.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Alexander Clouter [Sun, 5 Jul 2009 11:00:55 +0000 (12:00 +0100)]
MIPS: Fix compile for !CONFIG_SMP
Commit
fc03bc1715ca0ad4ccfe97aab16bcc9e7129c1a4 breaks compiling MIPS
with SMP disabled. This patch fixes that.
Signed-off-by: Alexander Clouter <alex@digriz.org.uk>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Akinobu Mita [Fri, 3 Jul 2009 16:33:09 +0000 (01:33 +0900)]
MIPS: Drop mmap_sem in pagefault oom path
Fix the pagefault oom path which does not drop mm->mmap_sem.
This was introduced by commit
c7c1e3846bac1e4b8a8941f6a194812e28b0a519
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Ralf Baechle [Mon, 6 Jul 2009 08:13:17 +0000 (09:13 +0100)]
MIPS: Eleminate filenames from comments
They tend to get not updated when files are moved around or copied and
lack any obvious use. While at it zap some only too obvious comments and
as per Shinya's suggestion, add a copyright header to extable.c.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Acked-by: Shinya Kuribayashi <shinya.kuribayashi@necel.com>
Acked-by: Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com>
Ralf Baechle [Sun, 5 Jul 2009 18:23:30 +0000 (19:23 +0100)]
[PATCH] MIPS: Cavium: Move swapped comments to their rightful place.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Linus Torvalds [Mon, 3 Aug 2009 04:31:40 +0000 (21:31 -0700)]
Merge branch 'for-linus' of git://neil.brown.name/md
* 'for-linus' of git://neil.brown.name/md:
md: Use revalidate_disk to effect changes in size of device.
md: allow raid5_quiesce to work properly when reshape is happening.
md/raid5: set reshape_position correctly when reshape starts.
md: Handle growth of v1.x metadata correctly.
md: avoid array overflow with bad v1.x metadata
md: when a level change reduces the number of devices, remove the excess.
md: Push down data integrity code to personalities.
md/raid6: release spare page at ->stop()
NeilBrown [Mon, 3 Aug 2009 00:59:58 +0000 (10:59 +1000)]
md: Use revalidate_disk to effect changes in size of device.
As revalidate_disk calls check_disk_size_change, it will cause
any capacity change of a gendisk to be propagated to the blockdev
inode. So use that instead of mucking about with locks and
i_size_write.
Also add a call to revalidate_disk in do_md_run and a few other places
where the gendisk capacity is changed.
Signed-off-by: NeilBrown <neilb@suse.de>
NeilBrown [Mon, 3 Aug 2009 00:59:58 +0000 (10:59 +1000)]
md: allow raid5_quiesce to work properly when reshape is happening.
The ->quiesce method is not supposed to stop resync/recovery/reshape,
just normal IO.
But in raid5 we don't have a way to know which stripes are being
used for normal IO and which for resync etc, so we need to wait for
all stripes to be idle to be sure that all writes have completed.
However reshape keeps at least some stripe busy for an extended period
of time, so a call to raid5_quiesce can block for several seconds
needlessly.
So arrange for reshape etc to pause briefly while raid5_quiesce is
trying to quiesce the array so that the active_stripes count can
drop to zero.
Signed-off-by: NeilBrown <neilb@suse.de>
NeilBrown [Mon, 3 Aug 2009 00:59:57 +0000 (10:59 +1000)]
md/raid5: set reshape_position correctly when reshape starts.
As the internal reshape_progress counter is the main driver
for reshape, the fact that reshape_position sometimes starts with the
wrong value has minimal effect. It is visible in sysfs and that
is all.
Signed-off-by: NeilBrown <neilb@suse.de>
NeilBrown [Mon, 3 Aug 2009 00:59:57 +0000 (10:59 +1000)]
md: Handle growth of v1.x metadata correctly.
The v1.x metadata does not have a fixed size and can grow
when devices are added.
If it grows enough to require an extra sector of storage,
we need to update the 'sb_size' to match.
Without this, md can write out an incomplete superblock with a
bad checksum, which will be rejected when trying to re-assemble
the array.
Cc: stable@kernel.org
Signed-off-by: NeilBrown <neilb@suse.de>
NeilBrown [Mon, 3 Aug 2009 00:59:56 +0000 (10:59 +1000)]
md: avoid array overflow with bad v1.x metadata
We trust the 'desc_nr' field in v1.x metadata enough to use it
as an index in an array. This isn't really safe.
So range-check the value first.
Signed-off-by: NeilBrown <neilb@suse.de>
NeilBrown [Mon, 3 Aug 2009 00:59:55 +0000 (10:59 +1000)]
md: when a level change reduces the number of devices, remove the excess.
When an array is changed from RAID6 to RAID5, fewer drives are
needed. So any device that is made superfluous by the level
conversion must be marked as not-active.
For the RAID6->RAID5 conversion, this will be a drive which only
has 'Q' blocks on it.
Cc: stable@kernel.org
Signed-off-by: NeilBrown <neilb@suse.de>
Andre Noll [Mon, 3 Aug 2009 00:59:47 +0000 (10:59 +1000)]
md: Push down data integrity code to personalities.
This patch replaces md_integrity_check() by two new public functions:
md_integrity_register() and md_integrity_add_rdev() which are both
personality-independent.
md_integrity_register() is called from the ->run and ->hot_remove
methods of all personalities that support data integrity. The
function iterates over the component devices of the array and
determines if all active devices are integrity capable and if their
profiles match. If this is the case, the common profile is registered
for the mddev via blk_integrity_register().
The second new function, md_integrity_add_rdev() is called from the
->hot_add_disk methods, i.e. whenever a new device is being added
to a raid array. If the new device does not support data integrity,
or has a profile different from the one already registered, data
integrity for the mddev is disabled.
For raid0 and linear, only the call to md_integrity_register() from
the ->run method is necessary.
Signed-off-by: Andre Noll <maan@systemlinux.org>
Signed-off-by: NeilBrown <neilb@suse.de>
Linus Torvalds [Sun, 2 Aug 2009 21:15:46 +0000 (14:15 -0700)]
Merge git://git./linux/kernel/git/wim/linux-2.6-watchdog
* git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog:
[WATCHDOG] Fix COH 901 327 watchdog enablement
Linus Torvalds [Sun, 2 Aug 2009 21:15:27 +0000 (14:15 -0700)]
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:
eeepc-laptop: fix hot-unplug on resume
ACPI: Ingore the memory block with zero block size in course of memory hotplug
ACPI: Don't treat generic error as ACPI error code in acpi memory hotplug driver
ACPI: bind workqueues to CPU 0 to avoid SMI corruption
ACPI: root-only read protection on /sys/firmware/acpi/tables/*
thinkpad-acpi: fix incorrect use of TPACPI_BRGHT_MODE_ECNVRAM
thinkpad-acpi: restrict procfs count value to sane upper limit
thinkpad-acpi: remove dock and bay subdrivers
thinkpad-acpi: disable broken bay and dock subdrivers
hp-wmi: check that an input device exists in resume handler
Revert "ACPICA: Remove obsolete acpi_os_validate_address interface"
Greg Kroah-Hartman [Sat, 1 Aug 2009 04:28:16 +0000 (21:28 -0700)]
TTY: Maintainer change
Clearly, I am a glutton for punishment. I'll see if I can see Alan's
changes through to the end, otherwise I'll be fending off a lot of bug
reports for usb-serial devices.
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Sun, 2 Aug 2009 21:04:19 +0000 (14:04 -0700)]
Make pci_claim_resource() use request_resource() rather than insert_resource()
This function has traditionally used "insert_resource()", because before
commit
cebd78a8c5 ("Fix pci_claim_resource") it used to just insert the
resource into whatever root resource tree that was indicated by
"pcibios_select_root()".
So there Matthew fixed it to actually look up the proper parent
resource, which means that now it's actively wrong to then traverse the
resource tree any more: we already know exactly where the new resource
should go.
And when we then did commit
a76117dfd6 ("x86: Use pci_claim_resource"),
which changed the x86 PCI code from the open-coded
pr = pci_find_parent_resource(dev, r);
if (!pr || request_resource(pr, r) < 0) {
to using
if (pci_claim_resource(dev, idx) < 0) {
that "insert_resource()" now suddenly became a problem, and causes a
regression covered by
http://bugzilla.kernel.org/show_bug.cgi?id=13891
which this fixes.
Reported-and-tested-by: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Matthew Wilcox <willy@linux.intel.com>
Cc: Andrew Patterson <andrew.patterson@hp.com>
Cc: Linux PCI <linux-pci@vger.kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Walleij [Mon, 20 Jul 2009 22:40:46 +0000 (00:40 +0200)]
[WATCHDOG] Fix COH 901 327 watchdog enablement
Since the COH 901 327 found in U300 is clocked at 32 kHz we need
to wait for the interrupt clearing flag to propagate through
hardware in order not to accidentally fire off any interrupts
when we enable them.
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Len Brown [Sun, 2 Aug 2009 16:55:51 +0000 (12:55 -0400)]
Merge branch 'misc-2.6.31' into release
Len Brown [Sun, 2 Aug 2009 16:36:01 +0000 (12:36 -0400)]
Merge branch 'bugzilla-13825' into release
Alan Jenkins [Mon, 29 Jun 2009 08:40:07 +0000 (09:40 +0100)]
eeepc-laptop: fix hot-unplug on resume
OOPS on resume when the wireless adaptor is disabled during suspend was
introduced by "eeepc-laptop: read rfkill soft-blocked state on resume".
Unable to handle kernel NULL pointer dereference
Process s2disk
Tainted: G W
IP: klist_put
Call trace:
? klist_del
? device_del
? device_unregister
? pci_stop_dev
? pci_stop_bus
? pci_remove_device
? eeepc_rfkill_hotplug [eeepc_laptop]
? eeepc_hotk_resume [eeepc_laptop]
? acpi_device_resume
? device_resume
? hibernation_snapshot
It appears the PCI device is removed twice. The eeepc_rfkill_hotplug()
call from the resume handler is racing against the call from the ACPI
notifier callback. The ACPI notification is triggered by the resume
handler when it refreshes the value of CM_ASL_WLAN.
The fix is to serialize hotplug calls using a workqueue.
http://bugzilla.kernel.org/show_bug.cgi?id=13825
Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Acked-by: Corentin Chary <corentin.chary@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Len Brown [Sun, 2 Aug 2009 16:27:26 +0000 (12:27 -0400)]
Merge branch 'memhotplug-crash' into release
Zhao Yakui [Tue, 7 Jul 2009 02:56:11 +0000 (10:56 +0800)]
ACPI: Ingore the memory block with zero block size in course of memory hotplug
If the memory block size is zero, ignore it and don't do the memory hotplug
flowchart. Otherwise it will complain the following warning message:
>System RAM resource 0 -
ffffffffffffffff cannot be added
Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Zhao Yakui [Fri, 3 Jul 2009 02:49:03 +0000 (10:49 +0800)]
ACPI: Don't treat generic error as ACPI error code in acpi memory hotplug driver
Don't treat the generic error as ACPI error code. Otherwise when the generic
code is returned, it will complain the following warning messag:
>ACPI Exception (acpi_memhotplug-0171): UNKNOWN_STATUS_CODE,
Cannot get acpi bus device [
20080609]
>ACPI: Cannot find driver data
> ACPI Error (utglobal-0127): Unknown exception code: 0xFFFFFFED [
20080609]
> Pid: 85, comm: kacpi_notify Not tainted 2.6.27.19-5-default #1
Call Trace:
[<
ffffffff8020da29>] show_trace_log_lvl+0x41/0x58
[<
ffffffff8049a3da>] dump_stack+0x69/0x6f
.....
At the same time when the generic error code is returned, the ACPI_EXCEPTION
is replaced by the printk.
Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Len Brown [Sun, 2 Aug 2009 16:10:02 +0000 (12:10 -0400)]
Merge branch 'bugzilla-13751' into release
Bjorn Helgaas [Wed, 29 Jul 2009 21:54:25 +0000 (15:54 -0600)]
ACPI: bind workqueues to CPU 0 to avoid SMI corruption
On some machines, a software-initiated SMI causes corruption unless the
SMI runs on CPU 0. An SMI can be initiated by any AML, but typically it's
done in GPE-related methods that are run via workqueues, so we can avoid
the known corruption cases by binding the workqueues to CPU 0.
References:
http://bugzilla.kernel.org/show_bug.cgi?id=13751
https://bugs.launchpad.net/bugs/157171
https://bugs.launchpad.net/bugs/157691
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Len Brown [Sun, 2 Aug 2009 15:34:24 +0000 (11:34 -0400)]
Merge branch 'thinkpad' into release
Len Brown [Sun, 2 Aug 2009 15:33:01 +0000 (11:33 -0400)]
Merge branch 'bugzilla-13865' into release
Len Brown [Sun, 2 Aug 2009 15:31:32 +0000 (11:31 -0400)]
Merge branch 'bugzilla-13620-revert' into release
Len Brown [Thu, 30 Jul 2009 20:00:53 +0000 (16:00 -0400)]
ACPI: root-only read protection on /sys/firmware/acpi/tables/*
they were world readable.
Signed-off-by: Len Brown <len.brown@intel.com>
Henrique de Moraes Holschuh [Sat, 1 Aug 2009 15:04:20 +0000 (12:04 -0300)]
thinkpad-acpi: fix incorrect use of TPACPI_BRGHT_MODE_ECNVRAM
HBRV-based default selection of backlight control strategy didn't work
well, at least the X41 defines it but doesn't use it and I don't think
it will stop there.
Switch to a white/blacklist. All models that have HBRV defined have
been included in the list, and initially all ATI GPUs will get
ECNVRAM, and the Intel GPUs will get UCMS_STEP.
Symptoms of incorrect backlight mode selection are:
1. Non-working backlight control through sysfs;
2. Backlight gets reset to the lowest level at every shutdown, reboot
and when thinkpad-acpi gets unloaded;
This fixes a regression in 2.6.30, bugzilla #13826
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Reported-by: Tobias Diedrich <ranma+kernel@tdiedrich.de>
Cc: stable@kernel.org
Signed-off-by: Len Brown <len.brown@intel.com>
Michael Buesch [Sat, 1 Aug 2009 15:04:19 +0000 (12:04 -0300)]
thinkpad-acpi: restrict procfs count value to sane upper limit
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Acked-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
Henrique de Moraes Holschuh [Sat, 1 Aug 2009 15:04:18 +0000 (12:04 -0300)]
thinkpad-acpi: remove dock and bay subdrivers
The standard ACPI dock driver can handle the hotplug bays and docks of
the ThinkPads just fine (including batteries) as of 2.6.27, and the
code in thinkpad-acpi for the dock and bay subdrivers is currently
broken anyway...
Userspace needs some love to support the two-stage ejection nicely,
but it is simple enough to do through udev rules (you don't even need
HAL) so this wouldn't justify fixing the dock and bay subdrivers,
either.
That leaves warm-swap bays (_EJ3) support for thinkpad-acpi, as well
as support for the weird dock of the model 570, but since such support
has never left the "experimental" stage, it is also not a strong
enough reason to find a way to fix this code.
Users of ThinkPads with warm-swap bays are urged to request that _EJ3
support be added to the regular ACPI dock driver, if such feature is
indeed useful for them.
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
Henrique de Moraes Holschuh [Sat, 1 Aug 2009 15:04:17 +0000 (12:04 -0300)]
thinkpad-acpi: disable broken bay and dock subdrivers
Currently, the ThinkPad-ACPI bay and dock drivers are completely
broken, and cause a NULL pointer derreference in kernel mode (and,
therefore, an OOPS) when they try to issue events (i.e. on dock,
undock, bay ejection, etc).
OTOH, the standard ACPI dock driver can handle the hotplug bays and
docks of the ThinkPads just fine (including batteries) as of 2.6.27.
In fact, it does a much better job of it than thinkpad-acpi ever did.
It is just not worth the hassle to find a way to fix this crap without
breaking the (deprecated) thinkpad-acpi dock/bay ABI. This is old,
deprecated code that sees little testing or use.
As a quick fix suitable for -stable backports, mark the thinkpad-acpi
bay and dock subdrivers as BROKEN in Kconfig. The dead code will be
removed by a later patch.
This fixes bugzilla #13669, and should be applied to 2.6.27 and later.
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Reported-by: Joerg Platte <jplatte@naasa.net>
Cc: stable@kernel.org
Signed-off-by: Len Brown <len.brown@intel.com>
Linus Torvalds [Sat, 1 Aug 2009 18:18:56 +0000 (11:18 -0700)]
do_sigaltstack: small cleanups
The previous commit ("do_sigaltstack: avoid copying 'stack_t' as a
structure to user space") fixed a real bug. This one just cleans up the
copy from user space to that gcc can generate better code for it (and so
that it looks the same as the later copy back to user space).
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Sat, 1 Aug 2009 17:34:56 +0000 (10:34 -0700)]
do_sigaltstack: avoid copying 'stack_t' as a structure to user space
Ulrich Drepper correctly points out that there is generally padding in
the structure on 64-bit hosts, and that copying the structure from
kernel to user space can leak information from the kernel stack in those
padding bytes.
Avoid the whole issue by just copying the three members one by one
instead, which also means that the function also can avoid the need for
a stack frame. This also happens to match how we copy the new structure
from user space, so it all even makes sense.
[ The obvious solution of adding a memset() generates horrid code, gcc
does really stupid things. ]
Reported-by: Ulrich Drepper <drepper@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Sat, 1 Aug 2009 00:40:45 +0000 (17:40 -0700)]
Linux 2.6.31-rc5
Linus Torvalds [Fri, 31 Jul 2009 19:17:37 +0000 (12:17 -0700)]
Merge branch 'for-linus' of git://oss.sgi.com/xfs/xfs
* 'for-linus' of git://oss.sgi.com/xfs/xfs:
xfs: bump up nr_to_write in xfs_vm_writepage
xfs: reduce bmv_count in xfs_vn_fiemap
Linus Torvalds [Fri, 31 Jul 2009 19:10:26 +0000 (12:10 -0700)]
Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block
* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
io context: fix ref counting
block: make the end_io functions be non-GPL exports
block: fix improper kobject release in blk_integrity_unregister
block: always assign default lock to queues
mg_disk: Add missing ready status check on mg_write()
mg_disk: fix issue with data integrity on error in mg_write()
mg_disk: fix reading invalid status when use polling driver
mg_disk: remove prohibited sleep operation
Linus Torvalds [Fri, 31 Jul 2009 19:09:57 +0000 (12:09 -0700)]
Merge branch 'timers-fixes-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip
* 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
clocksource: Save mult_orig in clocksource_disable()
Linus Torvalds [Fri, 31 Jul 2009 19:09:22 +0000 (12:09 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/drzeus/mmc
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc:
mmc: orphan subsystem
imxmmc: Remove unnecessary semicolons
cb710: use SG_MITER_TO_SG/SG_MITER_FROM_SG
sdhci: use SG_MITER_TO_SG/SG_MITER_FROM_SG
lib/scatterlist: add a flags to signalize mapping direction
Linus Torvalds [Fri, 31 Jul 2009 19:09:02 +0000 (12:09 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/tiwai/sound-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6:
ALSA: sound/aoa: Add kmalloc NULL tests
ALSA: hda - Increase PCM stream name buf in patch_realtek.c
sound: mpu401.c: Buffer overflow
sound: aedsp16: Buffer overflow
ALSA: hda: fix out-of-bound hdmi_eld.sad[] write
ALSA: hda - Add quirk for Dell Studio 1555
Magnus Damm [Tue, 28 Jul 2009 21:09:55 +0000 (14:09 -0700)]
clocksource: Save mult_orig in clocksource_disable()
To fix the common case where ->enable() does not set up
mult, make sure mult_orig is saved in mult on disable.
Also add comments to explain why we do this.
Signed-off-by: Magnus Damm <damm@igel.co.jp>
Cc: johnstul@us.ibm.com
Cc: lethal@linux-sh.org
Cc: akpm@linux-foundation.org
LKML-Reference: <
20090618152432.10136.9932.sendpatchset@rx1.opensource.se>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Pierre Ossman [Fri, 31 Jul 2009 10:27:28 +0000 (12:27 +0200)]
mmc: orphan subsystem
I do not have the time to take care of this, so remove myself as
maintainer.
Signed-off-by: Pierre Ossman <pierre@ossman.eu>
Joe Perches [Sun, 28 Jun 2009 16:26:31 +0000 (09:26 -0700)]
imxmmc: Remove unnecessary semicolons
Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
Signed-off-by: Pierre Ossman <pierre@ossman.eu>
Sebastian Andrzej Siewior [Mon, 22 Jun 2009 07:18:05 +0000 (09:18 +0200)]
cb710: use SG_MITER_TO_SG/SG_MITER_FROM_SG
the code allready uses flush_kernel_dcache_page(). This patch updates the
driver to the recent sg API changes which require that either SG_MITER_TO_SG
or SG_MITER_FROM_SG is set. SG_MITER_TO_SG calls flush_kernel_dcache_page()
in sg_mitter_stop()
Signed-off-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Acked-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: Pierre Ossman <pierre@ossman.eu>
Sebastian Andrzej Siewior [Thu, 18 Jun 2009 07:33:32 +0000 (09:33 +0200)]
sdhci: use SG_MITER_TO_SG/SG_MITER_FROM_SG
so the page will be flushed on unmap on ARCH which need it.
Signed-off-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Signed-off-by: Pierre Ossman <pierre@ossman.eu>
Sebastian Andrzej Siewior [Thu, 18 Jun 2009 08:19:12 +0000 (10:19 +0200)]
lib/scatterlist: add a flags to signalize mapping direction
sg_miter_start() is currently unaware of the direction of the copy
process (to or from the scatter list). It is important to know the
direction because the page has to be flushed in case the data written
is seen on a different mapping in user land on cache incoherent
architectures.
Signed-off-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Acked-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Pierre Ossman <pierre@ossman.eu>
Takashi Iwai [Fri, 31 Jul 2009 08:17:45 +0000 (10:17 +0200)]
Merge branch 'fix/oss' into for-linus
* fix/oss:
sound: mpu401.c: Buffer overflow
sound: aedsp16: Buffer overflow
Takashi Iwai [Fri, 31 Jul 2009 08:17:44 +0000 (10:17 +0200)]
Merge branch 'fix/misc' into for-linus
* fix/misc:
ALSA: sound/aoa: Add kmalloc NULL tests
Takashi Iwai [Fri, 31 Jul 2009 08:17:42 +0000 (10:17 +0200)]
Merge branch 'fix/hda' into for-linus
* fix/hda:
ALSA: hda - Increase PCM stream name buf in patch_realtek.c
ALSA: hda: fix out-of-bound hdmi_eld.sad[] write
ALSA: hda - Add quirk for Dell Studio 1555
Julia Lawall [Fri, 31 Jul 2009 06:32:03 +0000 (08:32 +0200)]
ALSA: sound/aoa: Add kmalloc NULL tests
Check that the result of kzalloc is not NULL before a dereference.
The semantic match that finds this problem is as follows:
(http://www.emn.fr/x-info/coccinelle/)
// <smpl>
@@
expression *x;
identifier f;
constant char *C;
@@
x = \(kmalloc\|kcalloc\|kzalloc\)(...);
... when != x == NULL
when != x != NULL
when != (x || ...)
(
kfree(x)
|
f(...,C,...,x,...)
|
*f(...,x,...)
|
*x->f
)
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Fri, 31 Jul 2009 08:05:11 +0000 (10:05 +0200)]
ALSA: hda - Increase PCM stream name buf in patch_realtek.c
The name buf with size 16 is too short for some codec names, e.g.
truncated like "ALC861-VD Analo". Now the size is doubled.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Li Zefan [Fri, 31 Jul 2009 06:55:48 +0000 (08:55 +0200)]
io context: fix ref counting
Commit
d9c7d394a8ebacb60097b192939ae9f15235225e
("block: prevent possible io_context->refcount overflow") mistakenly
changed atomic_inc(&ioc->nr_tasks) to atomic_long_inc(&ioc->refcount).
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Acked-by: Nikanth Karthikesan <knikanth@suse.de>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Eric Sandeen [Fri, 31 Jul 2009 05:02:17 +0000 (00:02 -0500)]
xfs: bump up nr_to_write in xfs_vm_writepage
VM calculation for nr_to_write seems off. Bump it way
up, this gets simple streaming writes zippy again.
To be reviewed again after Jens' writeback changes.
Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Eric Sandeen <sandeen@sandeen.net>
Cc: Chris Mason <chris.mason@oracle.com>
Reviewed-by: Felix Blyakher <felixb@sgi.com>
Signed-off-by: Felix Blyakher <felixb@sgi.com>
Eric Sandeen [Mon, 27 Jul 2009 02:52:01 +0000 (21:52 -0500)]
xfs: reduce bmv_count in xfs_vn_fiemap
commit
6321e3ed2acf3ee9643cdd403e1c88605d7944ba caused
the full bmv_count's worth of getbmapx structures to get
allocated; telling it to do MAXEXTNUM was a bit insane,
resulting in ENOMEM every time.
Chop it down to something reasonable, the number of slots
in the caller's input buffer. If this is too large the
caller may get ENOMEM but the reason should not be a
mystery, and they can try again with something smaller.
We add 1 to the value because in the normal getbmap
world, bmv_count includes the header and xfs_getbmap does:
nex = bmv->bmv_count - 1;
if (nex <= 0)
return XFS_ERROR(EINVAL);
Signed-off-by: Eric Sandeen <sandeen@sandeen.net>
Reviewed-by: Olaf Weber <olaf@sgi.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Felix Blyakher <felixb@sgi.com>
Dan Williams [Fri, 31 Jul 2009 02:39:15 +0000 (12:39 +1000)]
md/raid6: release spare page at ->stop()
Add missing call to safe_put_page from stop() by unifying open coded
raid5_conf_t de-allocation under free_conf().
Cc: <stable@kernel.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Linus Torvalds [Thu, 30 Jul 2009 23:46:58 +0000 (16:46 -0700)]
Merge branch 'tracing-fixes-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip
* 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
tracing/stat: Fix seqfile memory leak
function-graph: Fix seqfile memory leak
trace_stack: Fix seqfile memory leak
profile: Suppress warning about large allocations when profile=1 is specified
Linus Torvalds [Thu, 30 Jul 2009 23:46:48 +0000 (16:46 -0700)]
Merge git://git./linux/kernel/git/mason/btrfs-unstable
* git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable:
Btrfs: be more polite in the async caching threads
Btrfs: preserve commit_root for async caching
Linus Torvalds [Thu, 30 Jul 2009 23:46:31 +0000 (16:46 -0700)]
Merge branch 'next' of git://git./linux/kernel/git/djbw/async_tx
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx:
dmaengine: at_hdmac: add DMA slave transfers
dmaengine: at_hdmac: new driver for the Atmel AHB DMA Controller
dmaengine: dmatest: correct thread_count while using multiple thread per channel
dmaengine: dmatest: add a maximum number of test iterations
drivers/dma: Remove unnecessary semicolons
drivers/dma/fsldma.c: Remove unnecessary semicolons
dmaengine: move HIGHMEM64G restriction to ASYNC_TX_DMA
fsldma: do not clear bandwidth control bits on the 83xx controller
fsldma: enable external start for the 83xx controller
fsldma: use PCI Read Multiple command
Linus Torvalds [Thu, 30 Jul 2009 23:46:17 +0000 (16:46 -0700)]
Merge branch 'for_linus' of git://git./linux/kernel/git/jack/linux-udf-2.6
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-udf-2.6:
udf: Fix loading of VAT inode when drive wrongly reports number of recorded blocks
Linus Torvalds [Thu, 30 Jul 2009 23:46:06 +0000 (16:46 -0700)]
Merge branch 'for_linus' of git://git./linux/kernel/git/jack/linux-quota-2.6
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-quota-2.6:
quota: Silence lockdep on quota_on
Linus Torvalds [Thu, 30 Jul 2009 23:45:53 +0000 (16:45 -0700)]
Merge git://git.infradead.org/users/cbou/battery-2.6.31
* git://git.infradead.org/users/cbou/battery-2.6.31:
Add ds2782 battery gas gauge driver
olpc_battery: Ensure that the TRICKLE bit is checked
olpc_battery: Fix up eeprom read function
Linus Torvalds [Thu, 30 Jul 2009 23:45:37 +0000 (16:45 -0700)]
Merge git://git./linux/kernel/git/steve/gfs2-2.6-fixes
* git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-fixes:
GFS2: remove dcache entries for remote deleted inodes
GFS2: Fix incorrent statfs consistency check
GFS2: Don't put unlikely reclaim candidates on the reclaim list.
GFS2: Don't try and dealloc own inode
GFS2: Fix panic in glock memory shrinker
GFS2: keep statfs info in sync on grows
GFS2: Shrink the shrinker
Linus Torvalds [Thu, 30 Jul 2009 23:45:20 +0000 (16:45 -0700)]
Merge branch 'merge' of git://git./linux/kernel/git/benh/powerpc
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
powerpc: Update defconfigs for embedded 6xx/7xxx, 8xx, 8{3,5,6}xxx
powerpc/86xx: Update GE Fanuc sbc310 default configuration
powerpc/86xx: Update defconfig for GE Fanuc's PPC9A
cpm_uart: Don't use alloc_bootmem in cpm_uart_cpm2.c
powerpc/83xx: Fix PCI IO base address on MPC837xE-RDB boards
powerpc/85xx: Don't scan for TBI PHY addresses on MPC8569E-MDS boards
powerpc/85xx: Fix ethernet link detection on MPC8569E-MDS boards
powerpc/mm: Fix SMP issue with MMU context handling code
Linus Torvalds [Thu, 30 Jul 2009 23:45:03 +0000 (16:45 -0700)]
Merge git://git./linux/kernel/git/rusty/linux-2.6-for-linus
* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus:
lguest and virtio: cleanup struct definitions to Linux style.
lguest: update commentry
lguest: fix comment style
virtio: refactor find_vqs
virtio: delete vq from list
virtio: fix memory leak on device removal
lguest: fix descriptor corruption in example launcher
lguest: dereferencing freed mem in add_eventfd()
Masami Hiramatsu [Tue, 28 Jul 2009 23:47:23 +0000 (19:47 -0400)]
kprobes: Use kernel_text_address() for checking probe address
Use kernel_text_address() for checking probe address instead of
__kernel_text_address(), because __kernel_text_address() returns true
for init functions even after relaseing those functions.
That will hit a BUG() in text_poke().
Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Jim Keniston <jkenisto@us.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Thu, 30 Jul 2009 23:40:37 +0000 (16:40 -0700)]
Alan doesn't want to maintain tty code any more
Not that anybody can blame him. It's a morass. But hey, it's way
better than it _used_ to be, though, so thanks for all the fish.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Frans Pop [Thu, 30 Jul 2009 21:16:05 +0000 (17:16 -0400)]
hp-wmi: check that an input device exists in resume handler
Some systems may not support input events, or registering the input
handler may have failed. So check that an input device exists before
trying to set the docking and tablet mode state during resume.
Fixes: http://bugzilla.kernel.org/show_bug.cgi?id=13865
Reported-and-tested-by: Cédric Godin <cedric@belbone.be>
Signed-off-by: Frans Pop <elendil@planet.nl>
Acked-by: Matthew Garrett <mjg59@srcf.ucam.org>
Signed-off-by: Len Brown <len.brown@intel.com>
Jan Kara [Wed, 22 Jul 2009 16:12:17 +0000 (18:12 +0200)]
quota: Silence lockdep on quota_on
Commit
d01730d74d2b0155da50d44555001706294014f7 didn't completely fix
the problem since we still take dqio_mutex and i_mutex in the wrong
order. Move taking of i_mutex further down (luckily it's needed only
for updating inode flags) below where dqio_mutex is taken.
Tested-by: Valdis Kletnieks <valdis.kletnieks@vt.edu>
Signed-off-by: Jan Kara <jack@suse.cz>
Jan Kara [Tue, 14 Jul 2009 17:30:23 +0000 (19:30 +0200)]
udf: Fix loading of VAT inode when drive wrongly reports number of recorded blocks
VAT inode is located in the last block recorded block of the medium. When the
drive errorneously reports number of recorded blocks, we failed to load the VAT
inode and thus mount the medium. This patch makes kernel try to read VAT inode
from the last block of the device if it is different from the last recorded
block.
Signed-off-by: Jan Kara <jack@suse.cz>
Chris Mason [Thu, 30 Jul 2009 14:04:48 +0000 (10:04 -0400)]
Btrfs: be more polite in the async caching threads
The semaphore used by the async caching threads can prevent a
transaction commit, which can make the FS appear to stall. This
releases the semaphore more often when a transaction commit is
in progress.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Yan Zheng [Thu, 30 Jul 2009 13:40:40 +0000 (09:40 -0400)]
Btrfs: preserve commit_root for async caching
The async block group caching code uses the commit_root pointer
to get a stable version of the extent allocation tree for scanning.
This copy of the tree root isn't going to change and it significantly
reduces the complexity of the scanning code.
During a commit, we have a loop where we update the extent allocation
tree root. We need to loop because updating the root pointer in
the tree of tree roots may allocate blocks which may change the
extent allocation tree.
Right now the commit_root pointer is changed inside this loop. It
is more correct to change the commit_root pointer only after all the
looping is done.
Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Benjamin Marzinski [Thu, 23 Jul 2009 23:52:34 +0000 (18:52 -0500)]
GFS2: remove dcache entries for remote deleted inodes
When a file is deleted from a gfs2 filesystem on one node, a dcache
entry for it may still exist on other nodes in the cluster. If this
happens, gfs2 will be unable to free this file on disk. Because of this,
it's possible to have a gfs2 filesystem with no files on it and no free
space. With this patch, when a node receives a callback notifying it
that the file is being deleted on another node, it schedules a new
workqueue thread to remove the file's dcache entry.
Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Benjamin Marzinski [Fri, 10 Jul 2009 23:13:26 +0000 (18:13 -0500)]
GFS2: Fix incorrent statfs consistency check
Since both linked and unlinked inodes are counted by rgd->rd_dinodes, It
makes no sense to count them with the used data blocks (first check that
I changed), it makes sense to count them with the linked inodes (second
check), and it makes no sense to care if there are more unlinked inodes
than linked ones. This fixes these errors.
Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Benjamin Marzinski [Fri, 10 Jul 2009 23:04:24 +0000 (18:04 -0500)]
GFS2: Don't put unlikely reclaim candidates on the reclaim list.
GFS2 was placing far too many glocks on the reclaim list that were not good
candidates for freeing up from cache. These locks would sit there and
repeatedly get scanned to see if they could be reclaimed, wasting a lot
of time when there was memory pressure. This fix does more checks on the
locks to see if they are actually likely to be removable from cache.
Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Steven Whitehouse [Fri, 10 Jul 2009 20:13:38 +0000 (21:13 +0100)]
GFS2: Don't try and dealloc own inode
When searching for unlinked, but still allocated inodes during block
allocation, avoid the block relating to the inode that is doing the
allocation. This fixes a hang caused when an unlinked, but still
open, inode tries to allocate some more blocks and lands up
finding itself during the search for deallocatable inodes.
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Benjamin Marzinski [Tue, 30 Jun 2009 18:51:11 +0000 (13:51 -0500)]
GFS2: Fix panic in glock memory shrinker
It is possible for gfs2_shrink_glock_memory() to check a glock for
demotion
that's in the process of being freed by gfs2_glock_put(). In this case,
gfs2_shrink_glock_memory() will acquire a new reference to this glock,
and
then try to free the glock itself when it drops the refernce. To solve
this, gfs2_shrink_glock_memory() just needs to check if the glock is in
the process of being freed, and if so skip it without ever unlocking the
lru_lock.
Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
Acked-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Benjamin Marzinski [Thu, 25 Jun 2009 20:09:51 +0000 (15:09 -0500)]
GFS2: keep statfs info in sync on grows
GFS2 wasn't syncing its statfs info on grows. This causes a problem
when you grow the filesystem on multiple nodes. GFS2 would calculate
the new space based on the resource groups (which are always current),
and then assume that the filesystem had grown the from the existing
statfs size. If you grew the filesystem on two different nodes in a
short time, the second node wouldn't see the statfs size change from the
first node, and would assume that it was grown by a larger amount than
it was. When all these changes were synced out, the total fileystem
size would be incorrect (the first grow would be counted twice).
This patch syncs makes GFS2 read in the statfs changes from disk before
a grow, and write them out after the grow, while the master statfs inode
is locked.
Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Steven Whitehouse [Thu, 25 Jun 2009 15:30:26 +0000 (16:30 +0100)]
GFS2: Shrink the shrinker
This patch removes some of the special cases that the shrinker
was trying to deal with. As a result we leave fewer items on
the list and none at all which cannot be demoted. This makes
the list scanning more efficient and solves some issues seen
with large numbers of inodes.
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Rusty Russell [Thu, 30 Jul 2009 22:03:46 +0000 (16:03 -0600)]
lguest and virtio: cleanup struct definitions to Linux style.
I've been doing this for years, and akpm picked me up on it about 12
months ago. lguest partly serves as example code, so let's do it Right.
Also, remove two unused fields in struct vblk_info in the example launcher.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: Ingo Molnar <mingo@redhat.com>
Rusty Russell [Thu, 30 Jul 2009 22:03:45 +0000 (16:03 -0600)]
lguest: update commentry
Every so often, after code shuffles, I need to go through and unbitrot
the Lguest Journey (see drivers/lguest/README). Since we now use RCU in
a simple form in one place I took the opportunity to expand that explanation.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Paul McKenney <paulmck@linux.vnet.ibm.com>