From: Jens Axboe <axboe@kernel.dk>
To: Alexander Gordeev <agordeev@redhat.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH] blk-mq: bitmap tag: fix potential unwakeable sleep in bt_get()
Date: Mon, 21 Jul 2014 10:34:20 +0200 [thread overview]
Message-ID: <53CCD08C.80702@kernel.dk> (raw)
In-Reply-To: <20140721083202.GA2107@dhcp-26-207.brq.redhat.com>
On 2014-07-21 10:32, Alexander Gordeev wrote:
> On Mon, Jul 21, 2014 at 10:16:54AM +0200, Jens Axboe wrote:
>> What is this patch against?
>
> v3.16-rc5
My bad, was looking at the wrong sources. What is the race? If the clear
and wakeup come in after the prepare_to_wait() but before the
io_schedule(), the io_schedule() will be a no-op and it wont actually
sleep. Your commit message doesn't mention any particular details.
--
Jens Axboe
next prev parent reply other threads:[~2014-07-21 8:34 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-21 8:10 [PATCH] blk-mq: bitmap tag: fix potential unwakeable sleep in bt_get() Alexander Gordeev
2014-07-21 8:16 ` Jens Axboe
2014-07-21 8:32 ` Alexander Gordeev
2014-07-21 8:34 ` Jens Axboe [this message]
2014-07-21 9:11 ` Alexander Gordeev
2014-07-22 8:27 ` Alexander Gordeev
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