From: Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
To: Vivek Goyal <vgoyal-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Cc: Joseph Glanville
<joseph.glanville-2MxvZkOi9dvvnOemgxGiVw@public.gmane.org>,
cgroups <cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: 3.6-rc5 cgroups blkio throttle + md regression
Date: Thu, 20 Sep 2012 11:31:53 -0700 [thread overview]
Message-ID: <20120920183153.GI28934@google.com> (raw)
In-Reply-To: <20120919194231.GF31860-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Hello,
On Wed, Sep 19, 2012 at 03:42:31PM -0400, Vivek Goyal wrote:
> On Thu, Sep 20, 2012 at 04:20:42AM +1000, Joseph Glanville wrote:
> > Hi,
> >
> > I booted the machine under bare metal to continue bisecting.
> > Thankfully this allowed me to locate the commit that causes the
> > problem.
> >
>
> I tested it and I am also noticing the hang. I can see this hang on
> dm devices also.
>
> I suspect this issue is related to bio based drivers. We exit the
> bypass mode in blk_init_allocated_queue() and that will be called
> only for request based drivers. So for bio based drivers may be
> we never exit the bypass mode and this issue is somehow side
> affect of that.
Can you please trigger sysrq-t and post the result?
Thanks.
--
tejun
next prev parent reply other threads:[~2012-09-20 18:31 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-16 17:31 3.6-rc5 cgroups blkio throttle + md regression Joseph Glanville
[not found] ` <CAOzFzEhf2LfT0BCNPAgPgxZ3=pj2KvJ4Z6kP7XF8nnxag1dfvg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-09-19 16:28 ` Joseph Glanville
[not found] ` <CAOzFzEiC4313K4H9393ffzNyBo398BPYSxTk7ZEmuH4GfW5qtw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-09-19 18:20 ` Joseph Glanville
[not found] ` <CAOzFzEhWk_7oQFOyW6Ri_9Cvsshj2s3pa=Oo-p8uL6r340MoTw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-09-19 19:42 ` Vivek Goyal
[not found] ` <20120919194231.GF31860-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-09-20 18:31 ` Tejun Heo [this message]
[not found] ` <20120920183153.GI28934-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
2012-09-20 18:42 ` Vivek Goyal
[not found] ` <20120920184219.GH4681-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-09-20 19:17 ` Vivek Goyal
[not found] ` <20120920191716.GI4681-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-09-20 19:20 ` Tejun Heo
[not found] ` <20120920192038.GJ28934-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
2012-09-20 19:32 ` Vivek Goyal
[not found] ` <20120920193227.GJ4681-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-09-20 20:17 ` Tejun Heo
2012-09-20 19:57 ` Vivek Goyal
[not found] ` <20120920195759.GK4681-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-09-20 20:18 ` Tejun Heo
[not found] ` <20120920201815.GB7264-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
2012-09-20 21:08 ` [PATCH 1/2] block: lift the initial queue bypass mode on blk_register_queue() instead of blk_init_allocated_queue() Tejun Heo
2012-09-20 21:08 ` Tejun Heo
[not found] ` <20120920210852.GC7264-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
2012-09-20 21:09 ` [PATCH 2/2] block: fix request_queue->flags initialization Tejun Heo
2012-09-20 21:09 ` Tejun Heo
[not found] ` <20120920210930.GD7264-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
2012-09-21 13:25 ` Vivek Goyal
2012-09-21 13:25 ` Vivek Goyal
2012-09-21 13:25 ` [PATCH 1/2] block: lift the initial queue bypass mode on blk_register_queue() instead of blk_init_allocated_queue() Vivek Goyal
2012-09-21 13:25 ` Vivek Goyal
2012-09-21 13:25 ` Jens Axboe
2012-09-21 13:25 ` Jens Axboe
[not found] ` <505C6AD4.6030206-tSWWG44O7X1aa/9Udqfwiw@public.gmane.org>
2012-10-16 10:00 ` Joseph Glanville
2012-10-16 10:00 ` Joseph Glanville
[not found] ` <CAOzFzEiCWazLEfjo=w8c+7qCce98Q6faW1uwGm-tRmCNPJUztw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-10-16 19:11 ` Tejun Heo
2012-10-16 19:11 ` Tejun Heo
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