From: Tejun Heo <tj@kernel.org>
To: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: Jens Axboe <jaxboe@fusionio.com>,
Steven Whitehouse <swhiteho@redhat.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: Strange block/scsi/workqueue issue
Date: Fri, 22 Apr 2011 20:01:58 +0200 [thread overview]
Message-ID: <20110422180158.GB21902@mtj.dyndns.org> (raw)
In-Reply-To: <1302725866.2597.33.camel@mulgrave.site>
Hello, guys.
On Wed, Apr 13, 2011 at 03:17:46PM -0500, James Bottomley wrote:
> On Wed, 2011-04-13 at 22:12 +0200, Jens Axboe wrote:
> > This patch looks pretty clean. Shouldn't you serialize that ->queuedata
> > = NULL assignment with the queue lock, though?
>
> pointer assignment is atomic, isn't it? As in on a 32 bit arch, it
> definitely is, and I thought on 64 bits it also was. So a simultaneous
> reader either sees previous value or NULL.
What was the conclusion of this thread? James' fix seems minimal and
good for this cycle but I don't see it there yet. Jens, James?
Thanks.
--
tejun
next prev parent reply other threads:[~2011-04-22 18:02 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-11 14:56 Steven Whitehouse
2011-04-11 17:18 ` Tejun Heo
2011-04-11 17:29 ` Jens Axboe
2011-04-11 17:52 ` Steven Whitehouse
2011-04-12 0:14 ` Tejun Heo
2011-04-12 8:49 ` Steven Whitehouse
2011-04-12 0:47 ` James Bottomley
2011-04-12 2:51 ` Tejun Heo
2011-04-12 4:49 ` James Bottomley
2011-04-12 5:02 ` James Bottomley
2011-04-12 8:42 ` Steven Whitehouse
2011-04-12 13:42 ` James Bottomley
2011-04-12 14:06 ` Steven Whitehouse
2011-04-12 15:14 ` James Bottomley
2011-04-12 16:04 ` Steven Whitehouse
2011-04-12 16:27 ` James Bottomley
2011-04-12 16:51 ` Steven Whitehouse
2011-04-12 17:41 ` James Bottomley
2011-04-12 18:33 ` Steven Whitehouse
2011-04-12 19:56 ` James Bottomley
2011-04-12 20:30 ` Steven Whitehouse
2011-04-12 20:43 ` James Bottomley
2011-04-13 5:18 ` Tejun Heo
2011-04-13 6:06 ` Tejun Heo
2011-04-13 9:20 ` Steven Whitehouse
2011-04-13 14:00 ` Steven Whitehouse
2011-04-13 17:01 ` James Bottomley
2011-04-13 19:35 ` Steven Whitehouse
2011-04-13 20:12 ` Jens Axboe
2011-04-13 20:17 ` James Bottomley
2011-04-22 18:01 ` Tejun Heo [this message]
2011-04-22 18:06 ` James Bottomley
2011-04-22 18:30 ` Tejun Heo
2011-05-31 6:05 ` Anton V. Boyarshinov
2011-04-22 18:03 ` Tejun Heo
2011-04-12 5:15 ` Tejun Heo
2011-04-12 15:15 ` James Bottomley
2011-04-13 5:11 ` Tejun Heo
2011-04-13 14:15 ` James Bottomley
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