From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eric Dumazet Subject: Re: Hung task when calling clone() due to netfilter/slab Date: Sat, 14 Jan 2012 18:18:53 +0100 Message-ID: <1326561533.5287.26.camel@edumazet-laptop> References: <1326558605.19951.7.camel@lappy> <1326561043.5287.24.camel@edumazet-laptop> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: Dave Jones , davem , Pekka Enberg , Christoph Lameter , Matt Mackall , kaber@trash.net, pablo@netfilter.org, linux-kernel , linux-mm , netfilter-devel@vger.kernel.org, netdev To: Sasha Levin Return-path: In-Reply-To: <1326561043.5287.24.camel@edumazet-laptop> Sender: netfilter-devel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org Le samedi 14 janvier 2012 =C3=A0 18:10 +0100, Eric Dumazet a =C3=A9crit= : > Apparently SLUB calls sysfs_slab_add() from kmem_cache_create() while > still holding slub_lock. >=20 > So if the task launched needs to "cat /proc/slabinfo" or anything > needing slub_lock, its a deadlock. >=20 >=20 Bug added in commit 2bce64858442149784f6c88 (slub: Allow removal of slab caches during boot) -- To unsubscribe from this list: send the line "unsubscribe netfilter-dev= el" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html