AcoSail/kernel_optimize_test
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Merge branch 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

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* 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  sched: Reassign prev and switch_count when reacquire_kernel_lock() fail
  sched: Fix vmark regression on big machines
This commit is contained in:
Linus Torvalds 2010-01-21 08:49:52 -08:00
commit 341031caec
3 changed files with 6 additions and 3 deletions
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2
include/linux/topology.h
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@ -99,7 +99,7 @@ int arch_update_cpu_topology(void);
| 1*SD_WAKE_AFFINE \
| 1*SD_SHARE_CPUPOWER \
| 0*SD_POWERSAVINGS_BALANCE \
| 0*SD_SHARE_PKG_RESOURCES \
| 1*SD_SHARE_PKG_RESOURCES \
| 0*SD_SERIALIZE \
| 0*SD_PREFER_SIBLING \
, \

5
kernel/sched.c
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@ -5530,8 +5530,11 @@ asmlinkage void __sched schedule(void)
post_schedule(rq);
if (unlikely(reacquire_kernel_lock(current) < 0))
if (unlikely(reacquire_kernel_lock(current) < 0)) {
prev = rq->curr;
switch_count = &prev->nivcsw;
goto need_resched_nonpreemptible;
}
preempt_enable_no_resched();
if (need_resched())

2
kernel/sched_fair.c
View File

@ -1508,7 +1508,7 @@ static int select_task_rq_fair(struct task_struct *p, int sd_flag, int wake_flag
* If there's an idle sibling in this domain, make that
* the wake_affine target instead of the current cpu.
*/
if (tmp->flags & SD_PREFER_SIBLING)
if (tmp->flags & SD_SHARE_PKG_RESOURCES)
target = select_idle_sibling(p, tmp, target);
if (target >= 0) {