linux-kernel - Re: [PATCH] blk-mq: bitmap tag: fix potential unwakeable sleep in bt

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Message-ID: <20140722082716.GA12370@dhcp-26-207.brq.redhat.com>
Date:	Tue, 22 Jul 2014 10:27:16 +0200
From:	Alexander Gordeev <agordeev@...hat.com>
To:	Jens Axboe <axboe@...nel.dk>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] blk-mq: bitmap tag: fix potential unwakeable sleep in
 bt_get()

On Mon, Jul 21, 2014 at 11:11:44AM +0200, Alexander Gordeev wrote:
> > 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.
> 
> Let me examine the code.. It was few weeks ago and I can not
> remember what was that. And the changelog does not help :)

Jens,

I can not recall what was my concern. Sorry for the noise.

Thanks!

> > -- 
> > Jens Axboe
> > 

-- 
Regards,
Alexander Gordeev
agordeev@...hat.com
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