Merge tag 'kgdb-5.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/danielt...

[tomoyo/tomoyo-test1.git] / Documentation / admin-guide / kernel-parameters.txt

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 2cbde9e..52e63f3 100644 (file)
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -1753,6 +1753,13 @@
 
        initrd=         [BOOT] Specify the location of the initial ramdisk
 
+       initrdmem=      [KNL] Specify a physical address and size from which to
+                       load the initrd. If an initrd is compiled in or
+                       specified in the bootparams, it takes priority over this
+                       setting.
+                       Format: ss[KMG],nn[KMG]
+                       Default is 0, 0
+
        init_on_alloc=  [MM] Fill newly allocated pages and heap objects with
                        zeroes.
                        Format: 0 | 1
@@ -3349,7 +3356,7 @@
                        See Documentation/admin-guide/sysctl/vm.rst for details.
 
        ohci1394_dma=early      [HW] enable debugging via the ohci1394 driver.
-                       See Documentation/debugging-via-ohci1394.txt for more
+                       See Documentation/core-api/debugging-via-ohci1394.rst for more
                        info.
 
        olpc_ec_timeout= [OLPC] ms delay when issuing EC commands
@@ -4230,12 +4237,24 @@
                        Duration of CPU stall (s) to test RCU CPU stall
                        warnings, zero to disable.
 
+       rcutorture.stall_cpu_block= [KNL]
+                       Sleep while stalling if set.  This will result
+                       in warnings from preemptible RCU in addition
+                       to any other stall-related activity.
+
        rcutorture.stall_cpu_holdoff= [KNL]
                        Time to wait (s) after boot before inducing stall.
 
        rcutorture.stall_cpu_irqsoff= [KNL]
                        Disable interrupts while stalling if set.
 
+       rcutorture.stall_gp_kthread= [KNL]
+                       Duration (s) of forced sleep within RCU
+                       grace-period kthread to test RCU CPU stall
+                       warnings, zero to disable.  If both stall_cpu
+                       and stall_gp_kthread are specified, the
+                       kthread is starved first, then the CPU.
+
        rcutorture.stat_interval= [KNL]
                        Time (s) between statistics printk()s.
 
@@ -4306,6 +4325,13 @@
                        only normal grace-period primitives.  No effect
                        on CONFIG_TINY_RCU kernels.
 
+       rcupdate.rcu_task_ipi_delay= [KNL]
+                       Set time in jiffies during which RCU tasks will
+                       avoid sending IPIs, starting with the beginning
+                       of a given grace period.  Setting a large
+                       number avoids disturbing real-time workloads,
+                       but lengthens grace periods.
+
        rcupdate.rcu_task_stall_timeout= [KNL]
                        Set timeout in jiffies for RCU task stall warning
                        messages.  Disable with a value less than or equal
@@ -5087,6 +5113,12 @@
                        interruptions from clocksource watchdog are not
                        acceptable).
 
+       tsc_early_khz=  [X86] Skip early TSC calibration and use the given
+                       value instead. Useful when the early TSC frequency discovery
+                       procedure is not reliable, such as on overclocked systems
+                       with CPUID.16h support and partial CPUID.15h support.
+                       Format: <unsigned int>
+
        tsx=            [X86] Control Transactional Synchronization
                        Extensions (TSX) feature in Intel processors that
                        support TSX control.