From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752767AbaEDT0g (ORCPT ); Sun, 4 May 2014 15:26:36 -0400 Received: from mail-qa0-f41.google.com ([209.85.216.41]:56324 "EHLO mail-qa0-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752033AbaEDT0e (ORCPT ); Sun, 4 May 2014 15:26:34 -0400 Date: Sun, 4 May 2014 15:26:30 -0400 From: Tejun Heo To: Sasha Levin Cc: axboe@kernel.dk, Li Zefan , LKML , Dave Jones , cgroups@vger.kernel.org Subject: Re: blkcg: circular dependency between blkcg_pol_mutex and s_active Message-ID: <20140504192630.GE26279@htj.dyndns.org> References: <5363C04B.4010400@oracle.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <5363C04B.4010400@oracle.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, On Fri, May 02, 2014 at 11:56:59AM -0400, Sasha Levin wrote: > While fuzzing with trinity inside a KVM tools guest running the latest -next > kernel I've stumbled on the following: This is a highly unlikely deadlock which got introduced by recent changes in cgroup core. I'm working to further simplify locking in cgroup core. Will prep a quick fix for this issue soon. Thanks. -- tejun