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Message-ID: <20150406144951.GB2703@infradead.org>
Date: Mon, 6 Apr 2015 07:49:51 -0700
From: Christoph Hellwig <hch@...radead.org>
To: Ming Lei <ming.lei@...onical.com>
Cc: Jens Axboe <axboe@...nel.dk>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Christoph Hellwig <hch@...radead.org>,
Tejun Heo <tj@...nel.org>,
Andrew Morton <akpm@...ux-foundation.org>,
Alexander Viro <viro@...iv.linux.org.uk>,
Jarod Wilson <jarod@...hat.com>,
David Herrmann <dh.herrmann@...il.com>,
Markus Pargmann <mpa@...gutronix.de>,
"nbd-general@...ts.sourceforge.net"
<nbd-general@...ts.sourceforge.net>,
Stefan Haberland <stefan.haberland@...ibm.com>,
Sebastian Ott <sebott@...ux.vnet.ibm.com>,
Fabian Frederick <fabf@...net.be>, linux-s390@...r.kernel.org
Subject: Re: [PATCH 2/6] block: loop: don't hold lo_ctl_mutex in lo_open
On Mon, Apr 06, 2015 at 12:28:22AM +0800, Ming Lei wrote:
> Another simpler way is to make lo_refcnt as atomic_t and remove
> lo_ctrl_mutext in lo_open(), and freeze request queue during clearing
> fd, and better to freeze queue during setting fd too, so will update in
> v1 with this way.
Using an atomic_t sounds good to me.
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