Nick Piggin e17224bf1d [PATCH] sched: less locking ...

During periodic load balancing, don't hold this runqueue's lock while
scanning remote runqueues, which can take a non trivial amount of time
especially on very large systems.

Holding the runqueue lock will only help to stabilise ->nr_running, however
this doesn't do much to help because tasks being woken will simply get held
up on the runqueue lock, so ->nr_running would not provide a really
accurate picture of runqueue load in that case anyway.

What's more, ->nr_running (and possibly the cpu_load averages) of remote
runqueues won't be stable anyway, so load balancing is always an inexact
operation.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2005-09-10 10:06:23 -07:00

..

irq

[PATCH] CHECK_IRQ_PER_CPU() to avoid dead code in __do_IRQ()

2005-09-07 16:57:29 -07:00

power

Merge linux-2.6 with linux-acpi-2.6

2005-09-08 01:45:47 -04:00

acct.c

[PATCH] largefile support for accounting

2005-09-07 16:57:31 -07:00

audit.c

[NETLINK]: Add "groups" argument to netlink_kernel_create

2005-08-29 16:01:11 -07:00

auditsc.c

…

capability.c

[PATCH] kernel/capability.c: add kerneldoc

2005-07-27 16:26:06 -07:00

compat.c

…

configs.c

…

cpu.c

…

cpuset.c

[PATCH] cpuset semaphore depth check deadlock fix

2005-09-10 10:06:21 -07:00

crash_dump.c

[PATCH] kernel/crash_dump.c: add kerneldoc

2005-07-27 16:26:06 -07:00

dma.c

…

exec_domain.c

…

exit.c

[PATCH] files: files struct with RCU

2005-09-09 13:57:55 -07:00

extable.c

…

fork.c

[PATCH] files: files struct with RCU

2005-09-09 13:57:55 -07:00

futex.c

[PATCH] futex: remove duplicate code

2005-09-07 16:57:33 -07:00

intermodule.c

[PATCH] introduce and use kzalloc

2005-09-07 16:57:45 -07:00

itimer.c

[PATCH] itimer fixes

2005-07-27 16:25:51 -07:00

kallsyms.c

…

Kconfig.hz

…

Kconfig.preempt

…

kexec.c

…

kfifo.c

…

kmod.c

…

kprobes.c

[PATCH] kprobes: fix bug when probed on task and isr functions

2005-09-07 16:58:01 -07:00

ksysfs.c

…

kthread.c

…

Makefile

[PATCH] spinlock consolidation

2005-09-10 10:06:21 -07:00

module.c

[PATCH] flush icache early when loading module

2005-09-07 16:57:26 -07:00

panic.c

[PATCH] Call emergency_reboot from panic

2005-07-26 14:35:43 -07:00

params.c

[PATCH] introduce and use kzalloc

2005-09-07 16:57:45 -07:00

pid.c

…

posix-cpu-timers.c

…

posix-timers.c

[PATCH] fix send_sigqueue() vs thread exit race

2005-09-07 16:57:33 -07:00

printk.c

[PATCH] Provide better printk() support for SMP machines

2005-09-07 16:57:18 -07:00

profile.c

…

ptrace.c

[PATCH] remove duplicated code from proc and ptrace

2005-09-07 16:57:43 -07:00

rcupdate.c

[PATCH] files: rcuref APIs

2005-09-09 13:57:54 -07:00

resource.c

[PATCH] introduce and use kzalloc

2005-09-07 16:57:45 -07:00

sched.c

[PATCH] sched: less locking

2005-09-10 10:06:23 -07:00

seccomp.c

…

signal.c

[PATCH] fix send_sigqueue() vs thread exit race

2005-09-07 16:57:33 -07:00

softirq.c

[PATCH] revert bogus softirq changes

2005-07-30 10:49:59 -07:00

softlockup.c

[PATCH] detect soft lockups

2005-09-07 16:57:17 -07:00

spinlock.c

[PATCH] spinlock consolidation

2005-09-10 10:06:21 -07:00

stop_machine.c

…

sys_ni.c

[PATCH] remove sys_set_zone_reclaim()

2005-08-01 10:03:56 -07:00

sys.c

[PATCH] remove a redundant variable in sys_prctl()

2005-09-07 16:57:32 -07:00

sysctl.c

[NET]: Fix sparse warnings

2005-08-29 16:01:32 -07:00

time.c

[PATCH] clean up inline static vs static inline

2005-07-27 16:26:20 -07:00

timer.c

[PATCH] optimize writer path in time_interpolator_get_counter()

2005-09-07 16:57:24 -07:00

uid16.c

…

user.c

[PATCH] inotify

2005-07-12 20:38:38 -07:00

wait.c

…

workqueue.c

[PATCH] introduce and use kzalloc

2005-09-07 16:57:45 -07:00