* Yang Shi | 2013-09-16 14:09:18 [-0700]:
>---
> mm/memcontrol.c | 5 ++++-
> 1 files changed, 4 insertions(+), 1 deletions(-)
>
>diff --git a/mm/memcontrol.c b/mm/memcontrol.c
>index 82a187a..9f7cc0f 100644
>--- a/mm/memcontrol.c
>+++ b/mm/memcontrol.c
>@@ -2453,8 +2453,11 @@ static void drain_all_stock(struct mem_cgroup *root_memcg, bool sync)
> if (!test_and_set_bit(FLUSHING_CACHED_CHARGE, &stock->flags)) {
> if (cpu == curcpu)
> drain_local_stock(&stock->work);
>- else
>+ else {
>+ preempt_enable();
> schedule_work_on(cpu, &stock->work);
>+ preempt_disable();
>+ }
> }
What ensures that you don't switch CPUs between preempt_enable() &
preempt_disable() and is curcpu != smp_processor_id() ?
What about removing the get_cpu() & put_cpu() calls (and the shortcut)?
> }
> put_cpu();
Sebastian
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