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From: Eric Dumazet <eric.dumazet@gmail.com>
To: Sasha Levin <levinsasha928@gmail.com>
Cc: Dave Jones <davej@redhat.com>, davem <davem@davemloft.net>,
	Pekka Enberg <penberg@kernel.org>,
	Christoph Lameter <cl@linux-foundation.org>,
	Matt Mackall <mpm@selenic.com>,
	kaber@trash.net, pablo@netfilter.org,
	linux-kernel <linux-kernel@vger.kernel.org>,
	linux-mm <linux-mm@kvack.org>,
	netfilter-devel@vger.kernel.org, netdev <netdev@vger.kernel.org>
Subject: Re: Hung task when calling clone() due to netfilter/slab
Date: Sat, 14 Jan 2012 18:18:53 +0100	[thread overview]
Message-ID: <1326561533.5287.26.camel@edumazet-laptop> (raw)
In-Reply-To: <1326561043.5287.24.camel@edumazet-laptop>

Le samedi 14 janvier 2012 à 18:10 +0100, Eric Dumazet a écrit :

> Apparently SLUB calls sysfs_slab_add() from kmem_cache_create() while
> still holding slub_lock.
> 
> So if the task launched needs to "cat /proc/slabinfo" or anything
> needing slub_lock, its a deadlock.
> 
> 

Bug added in commit 2bce64858442149784f6c88
(slub: Allow removal of slab caches during boot)




  reply	other threads:[~2012-01-14 17:19 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-01-14 16:30 Hung task when calling clone() due to netfilter/slab Sasha Levin
2012-01-14 17:10 ` Eric Dumazet
2012-01-14 17:18   ` Eric Dumazet [this message]
2012-01-15 12:59   ` Sasha Levin
2012-01-15 17:25     ` Eric Dumazet
2012-01-17 15:12       ` Christoph Lameter
2012-01-17 15:20         ` Eric Dumazet
2012-01-17 15:27           ` Christoph Lameter
2012-01-17 15:30             ` Eric Dumazet
2012-01-17 16:04               ` Christoph Lameter
2012-01-17 22:22                 ` Christoph Lameter
2012-01-19 21:43                   ` Eric W. Biederman
2012-01-19 22:15                     ` Eric W. Biederman
2012-01-20  2:03                       ` Christoph Lameter
2012-01-20  2:31                         ` Eric W. Biederman
2012-01-20 14:49                           ` Christoph Lameter
2012-01-20 20:40                             ` Eric W. Biederman
2012-02-01  8:05                             ` Pekka Enberg
2012-02-01 17:32                               ` Eric W. Biederman
2012-02-01  8:07               ` Pekka Enberg

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