linux-kernel - Re: [PATCH] mm/slub: Switch slub_debug kernel option to early

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Message-ID: <20131106192154.GG5661@alberich>
Date:	Wed, 6 Nov 2013 20:21:54 +0100
From:	Andreas Herrmann <andreas.herrmann@...xeda.com>
To:	Christoph Lameter <cl@...ux.com>
Cc:	Pekka Enberg <penberg@...nel.org>, Matt Mackall <mpm@...enic.com>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mm/slub: Switch slub_debug kernel option to early_param
 to avoid boot panic

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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