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authorIngo Molnar <mingo@elte.hu>2008-11-19 09:44:37 +0100
committerIngo Molnar <mingo@elte.hu>2008-11-19 09:44:37 +0100
commit3ac3ba0b396fd99550e08034b0e4c27fdf39c252 (patch)
treef9f69fac41d66540a37a33808714d055d702328f /kernel/sched.c
parent934352f214b3251eb0793c1209d346595a661d80 (diff)
parent7f0f598a0069d1ab072375965a4b69137233169c (diff)
Merge branch 'linus' into sched/core
Conflicts: kernel/Makefile
Diffstat (limited to 'kernel/sched.c')
-rw-r--r--kernel/sched.c28
1 files changed, 20 insertions, 8 deletions
diff --git a/kernel/sched.c b/kernel/sched.c
index ebaf432365f..a4c156d9a4a 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -399,7 +399,7 @@ struct cfs_rq {
*/
struct sched_entity *curr, *next, *last;
- unsigned long nr_spread_over;
+ unsigned int nr_spread_over;
#ifdef CONFIG_FAIR_GROUP_SCHED
struct rq *rq; /* cpu runqueue to which this cfs_rq is attached */
@@ -949,6 +949,14 @@ static struct rq *task_rq_lock(struct task_struct *p, unsigned long *flags)
}
}
+void task_rq_unlock_wait(struct task_struct *p)
+{
+ struct rq *rq = task_rq(p);
+
+ smp_mb(); /* spin-unlock-wait is not a full memory barrier */
+ spin_unlock_wait(&rq->lock);
+}
+
static void __task_rq_unlock(struct rq *rq)
__releases(rq->lock)
{
@@ -1428,6 +1436,8 @@ static unsigned long cpu_avg_load_per_task(int cpu)
if (rq->nr_running)
rq->avg_load_per_task = rq->load.weight / rq->nr_running;
+ else
+ rq->avg_load_per_task = 0;
return rq->avg_load_per_task;
}
@@ -5840,6 +5850,8 @@ void __cpuinit init_idle(struct task_struct *idle, int cpu)
struct rq *rq = cpu_rq(cpu);
unsigned long flags;
+ spin_lock_irqsave(&rq->lock, flags);
+
__sched_fork(idle);
idle->se.exec_start = sched_clock();
@@ -5847,7 +5859,6 @@ void __cpuinit init_idle(struct task_struct *idle, int cpu)
idle->cpus_allowed = cpumask_of_cpu(cpu);
__set_task_cpu(idle, cpu);
- spin_lock_irqsave(&rq->lock, flags);
rq->curr = rq->idle = idle;
#if defined(CONFIG_SMP) && defined(__ARCH_WANT_UNLOCKED_CTXSW)
idle->oncpu = 1;
@@ -7740,13 +7751,14 @@ static int dattrs_equal(struct sched_domain_attr *cur, int idx_cur,
*
* The passed in 'doms_new' should be kmalloc'd. This routine takes
* ownership of it and will kfree it when done with it. If the caller
- * failed the kmalloc call, then it can pass in doms_new == NULL,
- * and partition_sched_domains() will fallback to the single partition
- * 'fallback_doms', it also forces the domains to be rebuilt.
+ * failed the kmalloc call, then it can pass in doms_new == NULL &&
+ * ndoms_new == 1, and partition_sched_domains() will fallback to
+ * the single partition 'fallback_doms', it also forces the domains
+ * to be rebuilt.
*
- * If doms_new==NULL it will be replaced with cpu_online_map.
- * ndoms_new==0 is a special case for destroying existing domains.
- * It will not create the default domain.
+ * If doms_new == NULL it will be replaced with cpu_online_map.
+ * ndoms_new == 0 is a special case for destroying existing domains,
+ * and it will not create the default domain.
*
* Call with hotplug lock held
*/