From: Ted Ts'o <tytso@mit.edu>
To: Jens Axboe <axboe@kernel.dk>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-ext4@vger.kernel.org" <linux-ext4@vger.kernel.org>
Subject: Re: What am I doing wrong? submit_bio() suddenly stops working...
Date: Thu, 21 Oct 2010 17:29:34 -0400 [thread overview]
Message-ID: <20101021212934.GI3127@thunk.org> (raw)
In-Reply-To: <4CC07C67.9010502@kernel.dk>
On Thu, Oct 21, 2010 at 07:46:15PM +0200, Jens Axboe wrote:
> By the sound of things, if I were you I'd turn on the mem and slab
> debugging to catch use-before-init and use-after-free. Mysterious hangs
> in the IO sub system are usually caused by such bugs. And the regular
> debugging aids, just to see if that produces anything of interest.
I've tried turning on slub_debug=FZP, and that didn't turn up
anything.
Looking at the traces, it looks like the queue gets plugged near the
end, but then I don't see an unplug timer event. I'm not sure what
could cuase that, though...
- Ted
next prev parent reply other threads:[~2010-10-21 21:29 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-21 2:00 What am I doing wrong? submit_bio() suddenly stops working Theodore Ts'o
2010-10-21 6:59 ` Jens Axboe
2010-10-21 16:55 ` Ted Ts'o
2010-10-21 17:41 ` Boaz Harrosh
2010-10-21 18:07 ` Jens Axboe
2010-10-22 13:04 ` Peter Zijlstra
2010-10-22 14:08 ` Jens Axboe
2010-10-21 18:14 ` Ted Ts'o
2010-10-21 18:21 ` Jens Axboe
2010-10-21 17:46 ` Jens Axboe
2010-10-21 21:29 ` Ted Ts'o [this message]
2010-10-22 3:34 ` Ted Ts'o
2010-10-22 7:19 ` Jens Axboe
2010-10-23 14:48 ` Ted Ts'o
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