john stultz b2d9323d13 Use num_possible_cpus() instead of NR_CPUS for timer distribution ...

To avoid lock contention, we distribute the sched_timer calls across the
cpus so they do not trigger at the same instant.  However, I used NR_CPUS,
which can cause needless grouping on small smp systems depending on your
kernel config.  This patch converts to using num_possible_cpus() so we
spread it as evenly as possible on every machine.

Briefly tested w/ NR_CPUS=255 and verified reduced contention.

Signed-off-by: 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>

2007-10-17 08:42:53 -07:00

..

irq

Fix CONFIG_DEBUG_SHIRQ trigger on free_irq()

2007-10-17 08:42:49 -07:00

power

hibernation doesn't even build on frv - tons of helpers are missing

2007-09-26 09:22:04 -07:00

time

Use num_possible_cpus() instead of NR_CPUS for timer distribution

2007-10-17 08:42:53 -07:00

.gitignore

…

acct.c

Cleanup non-arch xtime uses, use get_seconds() or current_kernel_time().

2007-07-25 10:09:20 -07:00

audit.c

[NET]: make netlink user -> kernel interface synchronious

2007-10-10 21:15:29 -07:00

audit.h

Audit: add TTY input auditing

2007-07-16 09:05:47 -07:00

auditfilter.c

[PATCH] allow audit filtering on bit & operations

2007-07-22 09:57:02 -04:00

auditsc.c

Clean up duplicate includes in kernel/

2007-10-17 08:42:48 -07:00

capability.c

…

compat.c

signal/timer/event: timerfd compat code

2007-05-11 08:29:36 -07:00

configs.c

use simple_read_from_buffer in kernel/

2007-05-09 12:30:49 -07:00

cpu.c

PM: Fix dependencies of CONFIG_SUSPEND and CONFIG_HIBERNATION

2007-08-31 01:42:22 -07:00

cpuset.c

oom: compare cpuset mems_allowed instead of exclusive ancestors

2007-10-17 08:42:46 -07:00

delayacct.c

sched: clean up schedstats, cnt -> count

2007-10-15 17:00:12 +02:00

die_notifier.c

move die notifier handling to common code

2007-05-08 11:15:04 -07:00

dma.c

…

exec_domain.c

…

exit.c

wait_task_stopped/continued: remove unneeded p->signal != NULL check

2007-10-17 08:42:52 -07:00

extable.c

…

fork.c

Slab API: remove useless ctor parameter and reorder parameters

2007-10-17 08:42:45 -07:00

futex_compat.c

robust futex thread exit race

2007-10-01 07:52:23 -07:00

futex.c

robust futex thread exit race

2007-10-01 07:52:23 -07:00

hrtimer.c

[KTIME]: Introduce ktime_sub_ns and ktime_sub_us

2007-10-10 16:48:12 -07:00

itimer.c

The scheduled -EINVAL for invalid timevals in setitimer

2007-05-08 11:15:13 -07:00

kallsyms.c

kallsyms: make KSYM_NAME_LEN include space for trailing '\0'

2007-07-17 10:23:03 -07:00

Kconfig.hz

…

Kconfig.preempt

[PATCH] sched: arch preempt notifier mechanism

2007-07-26 13:40:43 +02:00

kexec.c

Clean up duplicate includes in kernel/

2007-10-17 08:42:48 -07:00

kfifo.c

is_power_of_2: kernel/kfifo.c

2007-07-16 09:05:50 -07:00

kmod.c

Restore call_usermodehelper_pipe() behaviour

2007-09-11 17:21:20 -07:00

kprobes.c

kprobes: support kretprobe blacklist

2007-10-16 09:43:10 -07:00

ksysfs.c

sched: group scheduling, sysfs tunables

2007-10-15 17:00:14 +02:00

kthread.c

kthread: silence bogus section mismatch warning

2007-07-31 15:39:42 -07:00

latency.c

…

lockdep_internals.h

…

lockdep_proc.c

lockdep: Avoid /proc/lockdep & lock_stat infinite output

2007-10-11 22:11:11 +02:00

lockdep.c

lockdep: syscall exit check

2007-10-11 22:11:12 +02:00

Makefile

user namespace: add the framework

2007-07-16 09:05:47 -07:00

module.c

Add /sys/module/name/notes

2007-10-17 08:42:50 -07:00

mutex-debug.c

…

mutex-debug.h

…

mutex.c

lockdep: fixup mutex annotations

2007-10-11 22:11:12 +02:00

mutex.h

…

nsproxy.c

[NET]: Add network namespace clone & unshare support.

2007-10-10 16:52:46 -07:00

panic.c

Report that kernel is tainted if there was an OOPS

2007-07-17 10:23:02 -07:00

params.c

modules: better error messages when modules fail to load due to a sysfs problem.

2007-07-30 14:25:23 -07:00

pid.c

namespace: ensure clone_flags are always stored in an unsigned long

2007-07-16 09:05:48 -07:00

posix-cpu-timers.c

sched: make posix-cpu-timers use CFS's accounting information

2007-07-09 18:51:58 +02:00

posix-timers.c

SLAB_PANIC more (proc, posix-timers, shmem)

2007-10-17 08:42:47 -07:00

printk.c

printk: add interfaces for external access to the log buffer

2007-10-17 08:42:50 -07:00

profile.c

Memoryless nodes: Allow profiling data to fall back to other nodes

2007-10-16 09:42:58 -07:00

ptrace.c

m32r: convert to generic sys_ptrace

2007-10-16 09:43:04 -07:00

rcupdate.c

Clean up duplicate includes in kernel/

2007-10-17 08:42:48 -07:00

rcutorture.c

Clean up duplicate includes in kernel/

2007-10-17 08:42:48 -07:00

relay.c

Fix a use after free bug in kernel->userspace relay file support

2007-07-31 15:39:42 -07:00

resource.c

memory unplug: memory hotplug cleanup

2007-10-16 09:43:01 -07:00

rtmutex_common.h

FUTEX: Tidy up the code

2007-07-16 09:05:49 -07:00

rtmutex-debug.c

kernel/rtmutex-debug.c: cleanups

2007-10-17 08:42:50 -07:00

rtmutex-debug.h

…

rtmutex-tester.c

Freezer: make kernel threads nonfreezable by default

2007-07-17 10:23:02 -07:00

rtmutex.c

FUTEX: Tidy up the code

2007-07-16 09:05:49 -07:00

rtmutex.h

…

rwsem.c

lockstat: hook into spinlock_t, rwlock_t, rwsem and mutex

2007-07-19 10:04:49 -07:00

sched_debug.c

Make scheduler debug file operations const

2007-10-15 17:00:19 +02:00

sched_fair.c

sched: reintroduce cache-hot affinity

2007-10-15 17:00:18 +02:00

sched_idletask.c

sched: mark scheduling classes as const

2007-10-15 17:00:12 +02:00

sched_rt.c

sched: tidy up SCHED_RR

2007-10-15 17:00:13 +02:00

sched_stats.h

sched: clean up schedstats, cnt -> count

2007-10-15 17:00:12 +02:00

sched.c

cpuset: remove sched domain hooks from cpusets

2007-10-16 09:43:09 -07:00

seccomp.c

make seccomp zerocost in schedule

2007-07-16 09:05:50 -07:00

signal.c

__group_complete_signal: eliminate unneeded wakeup of ->group_exit_task

2007-10-17 08:42:51 -07:00

softirq.c

[KERNEL]: Unexport raise_softirq_irqoff

2007-10-10 16:49:18 -07:00

softlockup.c

softlockup: add a /proc tuning parameter

2007-10-17 08:42:47 -07:00

spinlock.c

lockstat: hook into spinlock_t, rwlock_t, rwsem and mutex

2007-07-19 10:04:49 -07:00

srcu.c

…

stacktrace.c

…

stop_machine.c

Fix stop_machine_run problem with naughty real time process

2007-07-16 09:05:41 -07:00

sys_ni.c

diskquota: 32bit quota tools on 64bit architectures

2007-07-16 09:05:48 -07:00

sys.c

Fix SMP poweroff hangs

2007-10-01 07:52:23 -07:00

sysctl.c

softlockup: add a /proc tuning parameter

2007-10-17 08:42:47 -07:00

taskstats.c

Clean up duplicate includes in kernel/

2007-10-17 08:42:48 -07:00

time.c

Clean up duplicate includes in kernel/

2007-10-17 08:42:48 -07:00

timer.c

Pull ia64-clocksource into release branch

2007-07-20 11:26:47 -07:00

tsacct.c

Cleanup non-arch xtime uses, use get_seconds() or current_kernel_time().

2007-07-25 10:09:20 -07:00

uid16.c

header cleaning: don't include smp_lock.h when not used

2007-05-08 11:15:07 -07:00

user_namespace.c

Fix user namespace exiting OOPs

2007-09-19 11:24:18 -07:00

user.c

sched: generate uevents for user creation/destruction

2007-10-15 17:00:18 +02:00

utsname_sysctl.c

remove CONFIG_UTS_NS and CONFIG_IPC_NS

2007-07-16 09:05:47 -07:00

utsname.c

Fix UTS corruption during clone(CLONE_NEWUTS)

2007-09-19 11:24:17 -07:00

wait.c

Fix occurrences of "the the "

2007-05-09 08:57:56 +02:00

workqueue.c

fix bogus hotplug cpu warning

2007-08-27 10:27:48 -07:00