From mboxrd@z Thu Jan 1 00:00:00 1970 From: Greg KH Subject: Re: [ANNOUNCE] 3.0.8-rt22 Date: Tue, 8 Nov 2011 16:07:10 -0800 Message-ID: <20111109000710.GC25933@kroah.com> References: <20111108105019.794045fa@redhat.com> <20111108174452.497da95f@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Thomas Gleixner , LKML , linux-rt-users , Peter Zijlstra , Ted Ts'o To: Clark Williams Return-path: Content-Disposition: inline In-Reply-To: <20111108174452.497da95f@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-rt-users.vger.kernel.org On Tue, Nov 08, 2011 at 05:44:52PM -0600, Clark Williams wrote: > On Tue, 8 Nov 2011 22:02:32 +0100 (CET) > Thomas Gleixner wrote: > > > On Tue, 8 Nov 2011, Clark Williams wrote: > > > Got the following splat on boot (f15 64-bit laptop, quad-core i7): > > > > > > [ 146.609030] > > > [ 146.609031] ======================================================= > > > [ 146.609033] [ INFO: possible circular locking dependency detected ] > > > [ 146.609035] 3.0.8-rt22+ #27 > > > [ 146.609036] ------------------------------------------------------- > > > [ 146.609038] dconf-service/9046 is trying to acquire lock: > > > [ 146.609040] (&sb->s_type->i_mutex_key#13){+.+.+.}, at: [] ext4_evict_inode+0x44/0x26f > > > [ 146.609047] > > > [ 146.609048] but task is already holding lock: > > > [ 146.609049] (&mm->mmap_sem){++++++}, at: [] sys_munmap+0x36/0x5b > > > [ 146.609053] > > > > That's an upstream problem which got pulled into 3.0 stable via commit > > 2526f36894 (upstream 2581fdc810) but lacks the followup upstream fix > > . The latter unfortunately has no Cc: stable tag .... > > > > Ted? > > > > Thanks, > > > > tglx > > > Thanks Thomas. I cherry-picked 8c0bec2, rebuilt with the same config > and have booted the resulting kernel with no lockdep splats. Great, I've queued it up for the next 3.0-stable release. greg k-h