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Date: Sun, 9 Sep 2012 06:21:10 +0000
From: Christoph <cl@...ux.com>
To: Hugh Dickins <hughd@...gle.com>
Cc: Pekka Enberg <penberg@...nel.org>,
Glauber Costa <glommer@...allels.com>,
Andrew Morton <akpm@...ux-foundation.org>,
"mm-commits@...r.kernel.org" <mm-commits@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"linux-mm@...ck.org" <linux-mm@...ck.org>,
"linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
"linux-next@...r.kernel.org" <linux-next@...r.kernel.org>
Subject: Re: [PATCH mmotm] slub: zero page to fix boot crashes
Yes that fix was already sent by me.
On Sep 8, 2012, at 22:42, Hugh Dickins <hughd@...gle.com> wrote:
> Latest mmotm rarely boots if SLUB is enabled: earlyprintk=vga shows
> it crashing with various backtraces. The memset has now been removed
> from kmem_cache_open(), so kmem_cache_init() needs to zero its page.
> This gets SLUB booting reliably again.
>
> Signed-off-by: Hugh Dickins <hughd@...gle.com>
> ---
>
> mm/slub.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> --- mmotm/mm/slub.c 2012-09-07 12:39:38.136019730 -0700
> +++ fixed/mm/slub.c 2012-09-08 19:37:38.608993123 -0700
> @@ -3712,7 +3712,7 @@ void __init kmem_cache_init(void)
> /* Allocate two kmem_caches from the page allocator */
> kmalloc_size = ALIGN(kmem_size, cache_line_size());
> order = get_order(2 * kmalloc_size);
> - kmem_cache = (void *)__get_free_pages(GFP_NOWAIT, order);
> + kmem_cache = (void *)__get_free_pages(GFP_NOWAIT | __GFP_ZERO, order);
>
> /*
> * Must first have the slab cache available for the allocations of the
--
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