diff options
| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2010-03-26 12:22:14 +0100 |
|---|---|---|
| committer | Paul Gortmaker <paul.gortmaker@windriver.com> | 2011-01-06 18:07:51 -0500 |
| commit | d9f7ec9b3727555ba55ad14bddb056468fc7e122 (patch) | |
| tree | f2a1eb027247a2b717438eb62e83153ded6397c1 /kernel | |
| parent | 61b3749e9e41eee782bae9cfb21ba81d10f5f583 (diff) | |
sched: Fix nr_uninterruptible count
commit cc87f76a601d2d256118f7bab15e35254356ae21 upstream.
The cpuload calculation in calc_load_account_active() assumes
rq->nr_uninterruptible will not change on an offline cpu after
migrate_nr_uninterruptible(). However the recent migrate on wakeup
changes broke that and would result in decrementing the offline cpu's
rq->nr_uninterruptible.
Fix this by accounting the nr_uninterruptible on the waking cpu.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/sched.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/kernel/sched.c b/kernel/sched.c index e542c1e56b82..074c4d8ec1d6 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -2388,8 +2388,12 @@ static int try_to_wake_up(struct task_struct *p, unsigned int state, * * First fix up the nr_uninterruptible count: */ - if (task_contributes_to_load(p)) - rq->nr_uninterruptible--; + if (task_contributes_to_load(p)) { + if (likely(cpu_online(orig_cpu))) + rq->nr_uninterruptible--; + else + this_rq()->nr_uninterruptible--; + } p->state = TASK_WAKING; if (p->sched_class->task_waking) |