From: Andreas Herrmann <andreas.herrmann@calxeda.com>
To: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>, Matt Mackall <mpm@selenic.com>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] mm/slub: Switch slub_debug kernel option to early_param to avoid boot panic
Date: Wed, 6 Nov 2013 20:21:54 +0100 [thread overview]
Message-ID: <20131106192154.GG5661@alberich> (raw)
In-Reply-To: <000001422ed8406b-14bef091-eee0-4e0e-bcdd-a8909c605910-000000@email.amazonses.com>
On Wed, Nov 06, 2013 at 02:16:33PM -0500, Christoph Lameter wrote:
> On Wed, 6 Nov 2013, Andreas Herrmann wrote:
>
> > When I've used slub_debug kernel option (e.g.
> > "slub_debug=,skbuff_fclone_cache" or similar) on a debug session I've
> > seen a panic like:
>
> Hmmm.. That looks like its due to some slabs not having names
> during early boot. kmem_cache_flags is called with NULL as a parameter.
>
> Are you sure that this fixes the issue?
?
Sure, of course I've tested my patch as I required slub debugging.
Panic was gone and debugging of the selected slab enabled.
Andreas
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WARNING: multiple messages have this Message-ID (diff)
From: Andreas Herrmann <andreas.herrmann@calxeda.com>
To: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>, Matt Mackall <mpm@selenic.com>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] mm/slub: Switch slub_debug kernel option to early_param to avoid boot panic
Date: Wed, 6 Nov 2013 20:21:54 +0100 [thread overview]
Message-ID: <20131106192154.GG5661@alberich> (raw)
In-Reply-To: <000001422ed8406b-14bef091-eee0-4e0e-bcdd-a8909c605910-000000@email.amazonses.com>
On Wed, Nov 06, 2013 at 02:16:33PM -0500, Christoph Lameter wrote:
> On Wed, 6 Nov 2013, Andreas Herrmann wrote:
>
> > When I've used slub_debug kernel option (e.g.
> > "slub_debug=,skbuff_fclone_cache" or similar) on a debug session I've
> > seen a panic like:
>
> Hmmm.. That looks like its due to some slabs not having names
> during early boot. kmem_cache_flags is called with NULL as a parameter.
>
> Are you sure that this fixes the issue?
?
Sure, of course I've tested my patch as I required slub debugging.
Panic was gone and debugging of the selected slab enabled.
Andreas
next prev parent reply other threads:[~2013-11-06 19:22 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-06 18:45 [PATCH] mm/slub: Switch slub_debug kernel option to early_param to avoid boot panic Andreas Herrmann
2013-11-06 18:45 ` Andreas Herrmann
2013-11-06 19:16 ` Christoph Lameter
2013-11-06 19:16 ` Christoph Lameter
2013-11-06 19:21 ` Andreas Herrmann [this message]
2013-11-06 19:21 ` Andreas Herrmann
2013-11-06 19:54 ` Andreas Herrmann
2013-11-06 19:54 ` Andreas Herrmann
2013-11-06 20:34 ` Andreas Herrmann
2013-11-06 20:34 ` Andreas Herrmann
2013-11-06 21:16 ` Andreas Herrmann
2013-11-06 21:16 ` Andreas Herrmann
2013-11-06 21:38 ` Christoph Lameter
2013-11-06 21:38 ` Christoph Lameter
2013-11-07 8:27 ` Andreas Herrmann
2013-11-07 8:27 ` Andreas Herrmann
2013-11-07 8:41 ` Andreas Herrmann
2013-11-07 8:41 ` Andreas Herrmann
2013-11-07 16:09 ` Christoph Lameter
2013-11-07 16:09 ` Christoph Lameter
[not found] ` <alpine.DEB.2.02.1311071008010.22533@gentwo.org>
2013-11-07 16:29 ` Christoph Lameter
2013-11-07 16:29 ` Christoph Lameter
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