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Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

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* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched: Fix lockup by limiting load-balance retries on lock-break
  sched: Fix CONFIG_CGROUP_SCHED dependency
  sched: Remove empty #ifdefs
This commit is contained in:
Linus Torvalds 2012-01-11 22:52:48 -08:00
commit b8bf17d311
3 changed files with 7 additions and 11 deletions
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1
init/Kconfig
View File

@ -713,7 +713,6 @@ config CGROUP_PERF
menuconfig CGROUP_SCHED
bool "Group CPU scheduler"
depends on EXPERIMENTAL
default n
help
This feature lets CPU scheduler recognize task groups and control CPU

7
kernel/sched/core.c
View File

@ -7134,10 +7134,6 @@ void set_curr_task(int cpu, struct task_struct *p)
#endif
#ifdef CONFIG_RT_GROUP_SCHED
#else /* !CONFIG_RT_GROUP_SCHED */
#endif /* CONFIG_RT_GROUP_SCHED */
#ifdef CONFIG_CGROUP_SCHED
/* task_group_lock serializes the addition/removal of task groups */
static DEFINE_SPINLOCK(task_group_lock);
@ -7246,9 +7242,6 @@ void sched_move_task(struct task_struct *tsk)
}
#endif /* CONFIG_CGROUP_SCHED */
#ifdef CONFIG_FAIR_GROUP_SCHED
#endif
#if defined(CONFIG_RT_GROUP_SCHED) || defined(CONFIG_CFS_BANDWIDTH)
static unsigned long to_ratio(u64 period, u64 runtime)
{

10
kernel/sched/fair.c
View File

@ -3130,8 +3130,10 @@ task_hot(struct task_struct *p, u64 now, struct sched_domain *sd)
}
#define LBF_ALL_PINNED 0x01
#define LBF_NEED_BREAK 0x02
#define LBF_ABORT 0x04
#define LBF_NEED_BREAK 0x02 /* clears into HAD_BREAK */
#define LBF_HAD_BREAK 0x04
#define LBF_HAD_BREAKS 0x0C /* count HAD_BREAKs overflows into ABORT */
#define LBF_ABORT 0x10
/*
* can_migrate_task - may task p from runqueue rq be migrated to this_cpu?
@ -4508,7 +4510,9 @@ redo:
goto out_balanced;
if (lb_flags & LBF_NEED_BREAK) {
lb_flags &= ~LBF_NEED_BREAK;
lb_flags += LBF_HAD_BREAK - LBF_NEED_BREAK;
if (lb_flags & LBF_ABORT)
goto out_balanced;
goto redo;
}