From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Lameter Subject: Re: Hung task when calling clone() due to netfilter/slab Date: Thu, 19 Jan 2012 20:03:51 -0600 (CST) Message-ID: References: <1326558605.19951.7.camel@lappy> <1326561043.5287.24.camel@edumazet-laptop> <1326632384.11711.3.camel@lappy> <1326648305.5287.78.camel@edumazet-laptop> <1326813630.2259.19.camel@edumazet-HP-Compaq-6005-Pro-SFF-PC> <1326814208.2259.21.camel@edumazet-HP-Compaq-6005-Pro-SFF-PC> Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Cc: Eric Dumazet , Sasha Levin , Dave Jones , davem , Pekka Enberg , Matt Mackall , kaber@trash.net, pablo@netfilter.org, linux-kernel , linux-mm , netfilter-devel@vger.kernel.org, netdev To: "Eric W. Biederman" Return-path: In-Reply-To: Sender: owner-linux-mm@kvack.org List-Id: netdev.vger.kernel.org On Thu, 19 Jan 2012, Eric W. Biederman wrote: > Oh. I see. The problem is calling kobject_uevent (which happens to > live in slabs sysfs_slab_add) with a lock held. And kobject_uevent > makes a blocking call to userspace. > > No locks held seems to be a good policy on that one. Well we can just remove that call to kobject_uevent instead then. Does it do anything useful? Cannot remember why we put that in there. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org