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| author | Dmitry Adamushko <dmitry.adamushko@gmail.com> | 2007-10-15 17:00:07 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2007-10-15 17:00:07 +0200 |
| commit | d02e5ed8d55e2a2b2735232ea1da40ffbf4c0932 (patch) | |
| tree | de972b3b1318deb834f61b6dba967ad32845c229 /kernel/sched_fair.c | |
| parent | 29f59db3a74b0bdf78a1f5b53ef773caa82692dc (diff) | |
| download | linux-d02e5ed8d55e2a2b2735232ea1da40ffbf4c0932.tar.bz2 | |
sched: sched_setscheduler() fix
Fix a problem in the 'sched-group' patch for !CONFIG_FAIR_GROUP_SCHED.
description:
sched_setscheduler()
{
...
if (task_running()) p->sched_class->put_prev_entity();
[ this one sets up cfs_rq->curr to NULL ]
...
if (task_running) p->sched_class->set_curr_task();
[ and this one is a _NOP_ (empty) for !CONFIG_FAIR_GROUP_SCHED ]
As a result, the task continues to run with cfs_rq->curr == NULL... no
crashes (due to checks for !NULL in place) but e.g. update_curr()
effectively becomes a NOP... i.e. runtime statistics for this task is
not accounted untill it's rescheduled anew.
Signed-off-by: Dmitry Adamushko <dmitry.adamushko@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/sched_fair.c')
| -rw-r--r-- | kernel/sched_fair.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c index 12ab9338d563..144f3ef97380 100644 --- a/kernel/sched_fair.c +++ b/kernel/sched_fair.c @@ -984,6 +984,10 @@ static void set_curr_task_fair(struct rq *rq) #else static void set_curr_task_fair(struct rq *rq) { + struct sched_entity *se = &rq->curr->se; + struct cfs_rq *cfs_rq = cfs_rq_of(se); + + cfs_rq->curr = se; } #endif |