From mboxrd@z Thu Jan 1 00:00:00 1970 From: "John Stoffel" Subject: Re: 4.4-rc3, KVM, br0 and instant hang Date: Sat, 5 Dec 2015 15:33:46 -0500 Message-ID: <22115.18986.538817.982478@quad.stoffel.home> References: <22114.26609.457727.203801@quad.stoffel.home> <20151205162328.GA32532@quad.stoffel.home> <22115.8036.357755.548697@quad.stoffel.home> <56631FBC.4030002@fb.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: John Stoffel , John Stoffel , , , To: Jens Axboe Return-path: In-Reply-To: <56631FBC.4030002@fb.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org >>>>> "Jens" == Jens Axboe writes: Jens> On 12/05/2015 10:31 AM, John Stoffel wrote: >>>>>>> "John" == John Stoffel writes: >> John> On Fri, Dec 04, 2015 at 11:28:33PM -0500, John Stoffel wrote: >>>> >> On my most recent bootup, I thought it was ok, since the VMs worked >> for a while (10 minutes) and I was starting to re-compile the kernel >> again to make more modules compiled in. No luck, I got the following >> crash dump (partial) on my netconsole box. >> >> [ 1434.266524] ------------[ cut here ]------------ >> [ 1434.266643] WARNING: CPU: 2 PID: 179 at block/blk-merge.c:435 blk_rq_map_sg+0x2d9/0x2eb() Jens> This is fixed in current -git, as of a few days ago. Thanks! I'll try that out and see how stable it is. I assume it doesn't matter if it's a deadline or cfq scheduler? In any case, I see the pull in Linus' tree and I'm building a kernel now to play with. Thanks! John