From: Jens Axboe <axboe@kernel.dk>
To: Christoph Hellwig <hch@infradead.org>,
Douglas Gilbert <dgilbert@interlog.com>
Cc: SCSI development list <linux-scsi@vger.kernel.org>
Subject: Re: lk 3.17-rc4 blk_mq large write problems
Date: Wed, 10 Sep 2014 10:47:49 -0600 [thread overview]
Message-ID: <541080B5.8080505@kernel.dk> (raw)
In-Reply-To: <20140910154144.GA22296@infradead.org>
On 2014-09-10 09:41, Christoph Hellwig wrote:
> While it might not help with a blown stack, can you give the patch below
> a try? I tries to solve a problem where the timeout handler hits
> before we've fully set up a command. While I'd like to understand the
> root cause of why we're hitting it as well, I'd also really to fix that
> race. It would also be good to get a gdb listing of the exact area in
> scsi_times_out listed in the oops.
It's a really long window, but it does exist. I'd be curious if the
patch makes a difference for this weird case. I have not seen anything
like it here.
BTW, please don't mix up the REQ_END and ->queue_rq() changes with the
changed start_request API.
--
Jens Axboe
next prev parent reply other threads:[~2014-09-10 16:47 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-10 3:55 lk 3.17-rc4 blk_mq large write problems Douglas Gilbert
2014-09-10 15:41 ` Christoph Hellwig
2014-09-10 16:47 ` Jens Axboe [this message]
2014-09-10 18:09 ` Christoph Hellwig
2014-09-10 18:26 ` Jens Axboe
2014-09-10 18:40 ` Christoph Hellwig
2014-09-10 18:42 ` Jens Axboe
2014-09-11 0:58 ` Douglas Gilbert
2014-09-11 2:00 ` Jens Axboe
2014-09-11 3:48 ` Elliott, Robert (Server Storage)
2014-09-11 5:37 ` Douglas Gilbert
2014-09-17 17:04 ` Christoph Hellwig
2014-09-22 23:14 ` Douglas Gilbert
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