From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mike Galbraith Subject: Re: 3.4.4-rt13: btrfs + xfstests 006 = BOOM.. and a bonus rt_mutex deadlock report for absolutely free! Date: Thu, 12 Jul 2012 15:51:23 +0200 Message-ID: <1342101083.7707.22.camel@marge.simpson.net> References: <1342072060.7338.102.camel@marge.simpson.net> <1342082648.7338.171.camel@marge.simpson.net> <1342086792.7707.9.camel@marge.simpson.net> <1342094233.7707.12.camel@marge.simpson.net> <1342100270.7707.20.camel@marge.simpson.net> <1342100889.7707.21.camel@marge.simpson.net> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Cc: "linux-rt-users@vger.kernel.org" , LKML , linux-fsdevel , Steven Rostedt , Peter Zijlstra To: Thomas Gleixner Return-path: In-Reply-To: <1342100889.7707.21.camel@marge.simpson.net> Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-rt-users.vger.kernel.org On Thu, 2012-07-12 at 15:48 +0200, Mike Galbraith wrote: > On Thu, 2012-07-12 at 15:43 +0200, Thomas Gleixner wrote: > > On Thu, 12 Jul 2012, Mike Galbraith wrote: > > > On Thu, 2012-07-12 at 15:31 +0200, Thomas Gleixner wrote: > > > > A quick check for memcpy finds that __btrfs_close_devices() does a > > > > memcpy of btrfs_device structs w/o initializing the lock in the new > > > > copy, but I have no idea whether that's the place we are looking for. > > > > > > > > > Cool, you found one, thanks! I'm setting boobytraps. > > > > > > Um, correction, box says I'm setting _buggy_ boobytraps :) > > > > > > Tomorrow-man will test this and frob traps anew. > > > > What kind of test setup do you have? i.e. raid, single disk ... > > Yeah, megaraid sas.. x3550 M3. (one disk for OS, one disk for xfstests to mangle)