Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753053Ab0H0CkF (ORCPT ); Thu, 26 Aug 2010 22:40:05 -0400 Received: from fgwmail6.fujitsu.co.jp ([192.51.44.36]:41985 "EHLO fgwmail6.fujitsu.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752434Ab0H0CkE (ORCPT ); Thu, 26 Aug 2010 22:40:04 -0400 X-SecurityPolicyCheck-FJ: OK by FujitsuOutboundMailChecker v1.3.1 Date: Fri, 27 Aug 2010 11:35:06 +0900 From: KAMEZAWA Hiroyuki To: Daisuke Nishimura Cc: Mark Hills , linux-kernel@vger.kernel.org Subject: Re: cgroup: rmdir() does not complete Message-Id: <20100827113506.2bbbb7b9.kamezawa.hiroyu@jp.fujitsu.com> In-Reply-To: <20100827095639.6e7297de.nishimura@mxp.nes.nec.co.jp> References: <20100827095639.6e7297de.nishimura@mxp.nes.nec.co.jp> Organization: FUJITSU Co. LTD. X-Mailer: Sylpheed 3.0.3 (GTK+ 2.10.14; i686-pc-mingw32) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1185 Lines: 43 On Fri, 27 Aug 2010 09:56:39 +0900 Daisuke Nishimura wrote: > > Or is it likely to be some other cause, and how best to find it? > > > What cgroup subsystem did you mount where the directory existed you tried > to rmdir() first ? > If you mounted several subsystems on the same hierarchy, can you mount them > separately to narrow down the cause ? > It seems I can reproduce the issue on mmotm-0811, too. try this. Here, memory cgroup is mounted at /cgroups. == #!/bin/bash -x while sleep 1; do date mkdir /cgroups/test echo 0 > /cgroups/test/tasks echo 300M > /cgroups/test/memory.limit_in_bytes cat /proc/self/cgroup dd if=/dev/zero of=./tmpfile bs=4096 count=100000 echo 0 > /cgroups/tasks cat /proc/self/cgroup rmdir /cgroups/test rm ./tmpfile done == hangs at rmdir. I'm no investigating force_empty. Thanks, -Kame -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/