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Date: Wed, 6 Nov 2013 20:21:54 +0100
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
Message-ID: <20131106192154.GG5661@alberich>
References: <20131106184529.GB5661@alberich>
 <000001422ed8406b-14bef091-eee0-4e0e-bcdd-a8909c605910-000000@email.amazonses.com>
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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