On Fri, 21 May 2010, Christoph Lameter wrote:
> Index: linux-2.6/mm/slub.c
> ===================================================================
> --- linux-2.6.orig/mm/slub.c 2010-04-27 12:41:05.000000000 -0500
> +++ linux-2.6/mm/slub.c 2010-04-27 13:15:32.000000000 -0500
> @@ -107,11 +107,17 @@
> * the fast path and disables lockless freelists.
> */
>
> +#define SLAB_DEBUG_FLAGS (SLAB_RED_ZONE | SLAB_POISON | SLAB_STORE_USER | \
> + SLAB_TRACE | SLAB_DEBUG_FREE)
> +
> +static inline int debug_on(struct kmem_cache *s)
> +{
> #ifdef CONFIG_SLUB_DEBUG
> -#define SLABDEBUG 1
> + return unlikely(s->flags & SLAB_DEBUG_FLAGS);
> #else
> -#define SLABDEBUG 0
> + return 0;
> #endif
> +}
>
> /*
> * Issues still to be resolved:
Nice optimization! I'd recommend a non-generic name for this check,
though, such as cache_debug_on().
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