[Top] [All Lists]

Re: kernel BUG at drivers/block/virtio_blk.c:172!

To: Jens Axboe <axboe@xxxxxxxxx>
Subject: Re: kernel BUG at drivers/block/virtio_blk.c:172!
From: Ming Lei <tom.leiming@xxxxxxxxx>
Date: Tue, 11 Nov 2014 08:56:27 +0800
Cc: Rusty Russell <rusty@xxxxxxxxxxxxxxx>, Jeff Layton <jlayton@xxxxxxxxxxxxxxx>, "Michael S. Tsirkin" <mst@xxxxxxxxxx>, Dave Chinner <david@xxxxxxxxxxxxx>, Linux Virtualization <virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx>, xfs@xxxxxxxxxxx
Delivered-to: xfs@xxxxxxxxxxx
Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=mUDGGyUm066zXqZbQM7Ec5Z46aEHZeusoUxKeUtK3Uk=; b=S/wuTmVzgO3RL1oQKhuEUiGTItgygSgLppP4LYOed4l4HSeqgllkizc73xgKrVVvLy HWk+phBCpc5PFFkYZx/TpF/+qcdXKroHgTzR8BUMM73Op/6qwXRZRhTrqVg55M3Igdg5 9HaiLfOw+huPlVzrRsszfTqIGOyzVMI816vn66DLCtepxjKlirfslYdmuNpZdFcaTsSu dyyGtKe2L+2mSHcdWtFY5mr5jdHW/SChXfqXzCKCvJIPI/r2P4TU5sZt9yE9Nlrq+H9a 8VWNSFEBaoNJP1xJ1CX+ub/d+4tmwar4rIbPi27euJKwNcjI4I/POZ7uSXVIRVuxMsW+ g2dg==
In-reply-to: <54614AE7.2080204@xxxxxxxxx>
References: <20141107080416.0837a88c@xxxxxxxxxxxxxxxxxxxxxxx> <87bnofnzop.fsf@xxxxxxxxxxxxxxx> <54614AE7.2080204@xxxxxxxxx>
On Tue, Nov 11, 2014 at 7:31 AM, Jens Axboe <axboe@xxxxxxxxx> wrote:
> On 2014-11-10 02:59, Rusty Russell wrote:
>> Jeff Layton <jlayton@xxxxxxxxxxxxxxx> writes:
>>> In the latest Fedora rawhide kernel in the repos, I'm seeing the
>>> following oops when mounting xfs. rc2-ish kernels seem to be fine:
>>> [   64.669633] ------------[ cut here ]------------
>>> [   64.670008] kernel BUG at drivers/block/virtio_blk.c:172!
>> Hmm, that's:
>>         BUG_ON(req->nr_phys_segments + 2 > vblk->sg_elems);
>> But during our probe routine we said:
>>         /* We can handle whatever the host told us to handle. */
>>         blk_queue_max_segments(q, vblk->sg_elems-2);
>> Jens?
> Known, I'm afraid, Ming is looking into it.

There is one obvious bug which should have been fixed by below


And there might be another one, I appreciate someone can post
log which is printed by patch("blk-seg.patch") in below link if the
bug still can be triggered even with above fix:


Ming Lei

<Prev in Thread] Current Thread [Next in Thread>