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21a1ea9eb4
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Dipankar Sarma 21a1ea9eb4 [PATCH] rcu batch tuning 
This patch adds new tunables for RCU queue and finished batches.  There are
two types of controls - number of completed RCU updates invoked in a batch
(blimit) and monitoring for high rate of incoming RCUs on a cpu (qhimark,
qlowmark).

By default, the per-cpu batch limit is set to a small value.  If the input
RCU rate exceeds the high watermark, we do two things - force quiescent
state on all cpus and set the batch limit of the CPU to INTMAX.  Setting
batch limit to INTMAX forces all finished RCUs to be processed in one shot.
 If we have more than INTMAX RCUs queued up, then we have bigger problems
anyway.  Once the incoming queued RCUs fall below the low watermark, the
batch limit is set to the default.

Signed-off-by: Dipankar Sarma <dipankar@in.ibm.com>
Cc: "Paul E. McKenney" <paulmck@us.ibm.com>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-08 14:14:01 -08:00
..
irq [PATCH] kernel/: small cleanups 2006-01-08 20:13:48 -08:00
power [PATCH] swsusp: fix breakage with swap on LVM 2006-02-17 13:59:27 -08:00
.gitignore gitignore: ignore more generated files 2006-01-03 11:35:26 +01:00
acct.c [PATCH] move capable() to capability.h 2006-01-11 18:42:13 -08:00
audit.c [PATCH] EDAC: atomic scrub operations 2006-01-18 19:20:30 -08:00
auditsc.c [PATCH] GFP_KERNEL allocations in atomic (auditsc) 2006-02-18 15:41:50 -05:00
capability.c [PATCH] move capable() to capability.h 2006-01-11 18:42:13 -08:00
compat.c [PATCH] remove bogus asm/bug.h includes. 2006-02-07 20:56:35 -05:00
configs.c update the email address of Randy Dunlap 2006-01-03 13:37:51 +01:00
cpu.c [PATCH] clean up lock_cpu_hotplug() in cpufreq 2005-11-28 14:42:23 -08:00
cpuset.c [PATCH] cpuset: oops in exit on null cpuset fix 2006-02-15 15:32:21 -08:00
dma.c
exec_domain.c
exit.c [PATCH] kjournald keeps reference to namespace 2006-02-20 20:27:38 -08:00
extable.c
fork.c [PATCH] fix kill_proc_info() vs fork() theoretical race 2006-02-15 10:21:24 -08:00
futex.c [PATCH] FRV: Make futex code compilable on nommu [try #2] 2006-01-06 08:33:33 -08:00
hrtimer.c [PATCH] fix next_timer_interrupt() for hrtimer 2006-03-06 18:40:44 -08:00
intermodule.c [PATCH] missing license tag in intermodule 2006-02-05 11:06:52 -08:00
itimer.c [PATCH] hrtimers: fix oldvalue return in setitimer 2006-02-01 08:53:12 -08:00
kallsyms.c [PATCH] fix missing includes 2005-10-30 17:37:32 -08:00
Kconfig.hz
Kconfig.preempt [PATCH] sched: voluntary kernel preemption 2005-06-25 16:24:45 -07:00
kexec.c [PATCH] move capable() to capability.h 2006-01-11 18:42:13 -08:00
kfifo.c [PATCH] gfp flags annotations - part 1 2005-10-08 15:00:57 -07:00
kmod.c [PATCH] Keys: Get rid of warning in kmod.c if keys disabled 2005-10-30 17:37:23 -08:00
kprobes.c [PATCH] Kprobes: Fix deadlock in function-return probes 2006-02-03 08:32:00 -08:00
ksysfs.c [PATCH] kdump: export per cpu crash notes pointer through sysfs 2006-01-10 08:01:26 -08:00
kthread.c [PATCH] Add kthread_stop_sem() 2005-10-30 17:37:17 -08:00
Makefile [PATCH] build kernel/intermodule.c only when required 2006-01-16 23:15:26 -08:00
module.c [PATCH] module: strlen_user() race fix 2006-02-07 16:12:32 -08:00
mutex-debug.c [PATCH] fix/simplify mutex debugging code 2006-01-11 08:14:16 -08:00
mutex-debug.h [PATCH] mutex subsystem, debugging code 2006-01-09 15:59:20 -08:00
mutex.c [PATCH] mutex: trivial whitespace cleanups 2006-01-10 14:27:59 -08:00
mutex.h [PATCH] mutex subsystem, core 2006-01-09 15:59:19 -08:00
panic.c [PATCH] prevent recursive panic from softlockup watchdog 2006-02-10 08:13:12 -08:00
params.c [PATCH] kernel/params.c: fix sysfs access with CONFIG_MODULES=n 2005-12-20 10:31:33 -08:00
pid.c [PATCH] RCU signal handling 2006-01-08 20:13:40 -08:00
posix-cpu-timers.c [PATCH] hrtimer: switch clock_nanosleep to hrtimer nanosleep API 2006-01-10 08:01:38 -08:00
posix-timers.c [PATCH] kernel/posix-timers.c: remove do_posix_clock_notimer_create() 2006-02-01 08:53:13 -08:00
printk.c correct email address of Manfred Spraul 2006-01-15 02:43:54 +01:00
profile.c [PATCH] mostly_read data section 2005-07-07 18:23:46 -07:00
ptrace.c [PATCH] fix zap_thread's ptrace related problems 2006-02-15 11:05:43 -08:00
rcupdate.c [PATCH] rcu batch tuning 2006-03-08 14:14:01 -08:00
rcutorture.c [PATCH] rcu_torture_lock deadlock fix 2006-01-31 11:30:18 -08:00
resource.c [PATCH] kernel/resource.c: __check_region(): remove pointless __deprecated 2006-01-10 08:02:02 -08:00
sched.c [PATCH] idle threads should have a sane ->timestamp value 2006-03-08 14:14:00 -08:00
seccomp.c
signal.c [PATCH] do_sigaction: cleanup ->sa_mask manipulation 2006-02-09 16:17:36 -08:00
softirq.c [PATCH] cpu hoptlug: avoid usage of smp_processor_id() in preemptible code 2005-11-07 07:53:29 -08:00
softlockup.c [PATCH] quieten softlockup at boot 2005-11-09 07:55:50 -08:00
spinlock.c [PATCH] spinlock consolidation 2005-09-10 10:06:21 -07:00
stop_machine.c [PATCH] Remove set_fs() in stop_machine() 2006-01-10 08:01:25 -08:00
sys_ni.c [PATCH] Fix compile for CONFIG_SYSVIPC=n or CONFIG_SYSCTL=n 2006-02-20 20:00:11 -08:00
sys.c [PATCH] kernel/sys.c NULL noise removal 2006-02-07 20:57:47 -05:00
sysctl.c [PATCH] fix acpi_video_flags on x86-64 2006-03-02 08:33:07 -08:00
time.c [PATCH] Normalize timespec for negative values in ns_to_timespec 2006-02-03 08:32:06 -08:00
timer.c [PATCH] time: add barrier after updating jiffies_64 2006-03-06 18:40:44 -08:00
uid16.c [PATCH] move capable() to capability.h 2006-01-11 18:42:13 -08:00
user.c [PATCH] "Fix uidhash_lock <-> RXU deadlock" fix 2006-01-31 16:49:43 -08:00
wait.c
workqueue.c [PATCH] Unlinline a bunch of other functions 2006-01-14 18:27:06 -08:00