From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail202.messagelabs.com (mail202.messagelabs.com [216.82.254.227]) by kanga.kvack.org (Postfix) with ESMTP id 55F8B8D0039 for ; Mon, 7 Mar 2011 00:45:44 -0500 (EST) Received: from m4.gw.fujitsu.co.jp (unknown [10.0.50.74]) by fgwmail5.fujitsu.co.jp (Postfix) with ESMTP id 70C383EE0C2 for ; Mon, 7 Mar 2011 14:45:40 +0900 (JST) Received: from smail (m4 [127.0.0.1]) by outgoing.m4.gw.fujitsu.co.jp (Postfix) with ESMTP id 5983F45DE51 for ; Mon, 7 Mar 2011 14:45:40 +0900 (JST) Received: from s4.gw.fujitsu.co.jp (s4.gw.fujitsu.co.jp [10.0.50.94]) by m4.gw.fujitsu.co.jp (Postfix) with ESMTP id 4464845DE4E for ; Mon, 7 Mar 2011 14:45:40 +0900 (JST) Received: from s4.gw.fujitsu.co.jp (localhost.localdomain [127.0.0.1]) by s4.gw.fujitsu.co.jp (Postfix) with ESMTP id 37AB11DB802F for ; Mon, 7 Mar 2011 14:45:40 +0900 (JST) Received: from m107.s.css.fujitsu.com (m107.s.css.fujitsu.com [10.240.81.147]) by s4.gw.fujitsu.co.jp (Postfix) with ESMTP id 044E21DB803F for ; Mon, 7 Mar 2011 14:45:40 +0900 (JST) Date: Mon, 7 Mar 2011 14:39:19 +0900 From: KAMEZAWA Hiroyuki Subject: Re: [Bugme-new] [Bug 30432] New: rmdir on cgroup can cause hang tasks Message-Id: <20110307143919.e4606054.kamezawa.hiroyu@jp.fujitsu.com> In-Reply-To: <20110307135803.a7d718ce.kamezawa.hiroyu@jp.fujitsu.com> References: <20110304000355.4f68bab1.akpm@linux-foundation.org> <20110304172815.9d9e3672.kamezawa.hiroyu@jp.fujitsu.com> <20110304180157.133fdfd1.kamezawa.hiroyu@jp.fujitsu.com> <20110307135803.a7d718ce.kamezawa.hiroyu@jp.fujitsu.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: KAMEZAWA Hiroyuki Cc: Andrew Morton , Daniel Poelzleithner , bugzilla-daemon@bugzilla.kernel.org, linux-mm@kvack.org, bugme-daemon@bugzilla.kernel.org, containers@lists.osdl.org, Paul Menage On Mon, 7 Mar 2011 13:58:03 +0900 KAMEZAWA Hiroyuki wrote: > On Fri, 4 Mar 2011 18:01:57 +0900 > KAMEZAWA Hiroyuki wrote: > > > On Fri, 4 Mar 2011 17:28:15 +0900 > > KAMEZAWA Hiroyuki wrote: > > This seems.... > > > == > > > static void mem_cgroup_start_move(struct mem_cgroup *mem) > > > { > > > ..... > > > put_online_cpus(); > > > > > > synchronize_rcu(); <---------(*) > > > } > > > == > > > > > > > But this may scan LRU of memcg forever and SysRq+T just shows > > above stack. > > > > I'll check a tree before THP and force_empty again > > Hmm, one more conern is what kind of file system is used ? > > Can I see > - /prco/mounts > and your .config ? > > If you use FUSE, could you try this ? > > I'll prepare one for mmotm. > Sorry, this version may contain hung-up bug... I'll start from fix for mmotm and backport it. Thanks, -Kame -- 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