On Thu, 22 Jan 2015, Andrey Skvortsov wrote:
> diff --git a/mm/slub.c b/mm/slub.c
> index ceee1d7..6bcd031 100644
> --- a/mm/slub.c
> +++ b/mm/slub.c
> @@ -2404,7 +2404,7 @@ redo:
> */
> do {
> tid = this_cpu_read(s->cpu_slab->tid);
> - c = this_cpu_ptr(s->cpu_slab);
> + c = raw_cpu_ptr(s->cpu_slab);
> } while (IS_ENABLED(CONFIG_PREEMPT) && unlikely(tid != c->tid));
>
> /*
> @@ -2670,7 +2670,7 @@ redo:
> */
> do {
> tid = this_cpu_read(s->cpu_slab->tid);
> - c = this_cpu_ptr(s->cpu_slab);
> + c = raw_cpu_ptr(s->cpu_slab);
> } while (IS_ENABLED(CONFIG_PREEMPT) && unlikely(tid != c->tid));
>
> /* Same with comment on barrier() in slab_alloc_node() */
This should already be fixed with
http://ozlabs.org/~akpm/mmotm/broken-out/mm-slub-optimize-alloc-free-fastpath-by-removing-preemption-on-off-v3.patch
You can find the latest mmotm, which was just released, at
http://ozlabs.org/~akpm/mmotm and it should be in linux-next tomorrow.
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