From: "Zhang, Yanmin" <yanmin_zhang@linux.intel.com>
To: Christoph Lameter <clameter@sgi.com>
Cc: LKML <linux-kernel@vger.kernel.org>
Subject: Re: NULL pointer in kmem_cache_alloc with 2.6.25-rc1
Date: Tue, 19 Feb 2008 15:03:14 +0800 [thread overview]
Message-ID: <1203404594.3248.32.camel@ymzhang> (raw)
In-Reply-To: <Pine.LNX.4.64.0802150839180.12023@schroedinger.engr.sgi.com>
On Fri, 2008-02-15 at 08:42 -0800, Christoph Lameter wrote:
> On Fri, 15 Feb 2008, Zhang, Yanmin wrote:
>
> > On my 16-core tigerton, kernel panic when I ran hackbench process testing. See
> > below log.
> >
>
> > Kernel panic at line 1637 in file mm/slub.c because object=c->freelist=NULL.
>
> Hmmmm. freelist should never be NULL. Could you rerun the test and boot with
> slub_debug to make sure that there is no memory corruption?
1) Without slub_debug option, sometime I could trigger it, sometimes not.
2) With slub_debug option, or just enable debug for slab skbuff_fclone_cache
and skbuff_head_cache, I couldn't trigger it.
I will do more testing and investigation, as the bug also exists in 2.6.25-rc2.
-yanmin
next prev parent reply other threads:[~2008-02-19 7:07 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-02-15 6:47 NULL pointer in kmem_cache_alloc with 2.6.25-rc1 Zhang, Yanmin
2008-02-15 16:42 ` Christoph Lameter
2008-02-19 7:03 ` Zhang, Yanmin [this message]
2008-02-19 7:38 ` Pekka Enberg
2008-02-27 22:15 ` Christoph Lameter
2008-02-18 12:59 ` Andrew Morton
2008-02-18 16:52 ` Arjan van de Ven
2008-02-19 3:14 ` Zhang, Yanmin
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