Re: [PATCH] mm/slub: suppress BUG messages for kmem_cache_alloc/kmem_cache_free

[David Rientjes]

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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