Messages in this thread | | | Date | Tue, 31 Jan 2012 14:18:30 +0530 | From | Kamalesh Babulal <> | Subject | Re: [PATCH] sched: At sched_fork use __set_task_cpu(). |
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* Rakib Mullick <rakib.mullick@gmail.com> [2012-01-29 22:34:37]:
> We don't use select_task_rq() from sched_fork() anymore and no chance of task gets migrated at > this point. Therefore, we can avoid task migration related checking/accounting, so use > __set_task_cpu() instead of set_task_cpu(). > > Signed-off-by: Rakib Mullick <rakib.mullick@gmail.com> Reviewed-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com> > --- > > diff --git a/kernel/sched/core.c b/kernel/sched/core.c > index df00cb0..a38026e 100644 > --- a/kernel/sched/core.c > +++ b/kernel/sched/core.c > @@ -1755,7 +1755,7 @@ void sched_fork(struct task_struct *p) > * Silence PROVE_RCU. > */ > raw_spin_lock_irqsave(&p->pi_lock, flags); > - set_task_cpu(p, cpu); > + __set_task_cpu(p, cpu); > raw_spin_unlock_irqrestore(&p->pi_lock, flags); > > #if defined(CONFIG_SCHEDSTATS) || defined(CONFIG_TASK_DELAY_ACCT) > > > --
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