Re: [PATCH] fix BUG_ON(!PageSlab) from fallback_alloc

["Pekka Enberg" <penberg@cs.helsinki.fi>]

Hi Hugh,

[Sorry, no access to kernel tree right now, so can't send a patch.]

On 1/4/07, Hugh Dickins <hugh@veritas.com> wrote:
> @@ -3310,7 +3310,7 @@ retry:
>                                          */
>                                         goto retry;
>                         } else {
> -                               kmem_freepages(cache, obj);
> +                               /* cache_grow already freed obj */
>                                 obj = NULL;

So, how about we rename the current cache_grow() to __cache_grow() and
move the kmem_freepages() to a higher level function like this:

static int cache_grow(struct kmem_cache *cache,
                               gfp_t flags, int nodeid)
{
       void *objp;
       int ret;

       if (flags & __GFP_NO_GROW)
               return 0;

       objp = kmem_getpages(cachep, flags, nodeid);
       if (!objp)
               return 0;

       ret = __cache_grow(cache, flags, nodeid, objp);
       if (!ret)
               kmem_freepages(cachep, objp);

       return ret;
}

And use the non-allocating __cache_grow version() in fallback_alloc() instead?
-
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