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SubjectRe: [RFC][PATCH] slub: Check for page NULL before doing the node_match check
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On Thu, 2013-01-17 at 13:10 -0500, Steven Rostedt wrote:

> diff --git a/mm/slub.c b/mm/slub.c
> index 2d9511a..85b95d5 100644
> --- a/mm/slub.c
> +++ b/mm/slub.c
> @@ -2399,7 +2399,7 @@ redo:
>
> object = c->freelist;
> page = c->page;
> - if (unlikely(!object || !node_match(page, node)))
> + if (unlikely(!object || !page || !node_match(page, node)))

I'm still trying to see if c->freelist != NULL and c->page == NULL isn't
a bug. The cmpxchg_doubles are a little confusing. If it's not expected
that page is NULL but freelist isn't than we need to figure out why it
happened.

-- Steve

> object = __slab_alloc(s, gfpflags, node, addr, c);
>
> else {
>
>




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