From: Tejun Heo <tj@kernel.org>
To: Ming Lei <tom.leiming@gmail.com>
Cc: Jens Axboe <axboe@kernel.dk>,
linux-kernel@vger.kernel.org, Mike Snitzer <snitzer@redhat.com>
Subject: Re: [PATCH 2/4] block: partition: convert percpu ref
Date: Thu, 16 Jul 2015 10:36:40 -0400 [thread overview]
Message-ID: <20150716143640.GT15934@mtj.duckdns.org> (raw)
In-Reply-To: <1437016607-375-3-git-send-email-tom.leiming@gmail.com>
On Thu, Jul 16, 2015 at 11:16:45AM +0800, Ming Lei wrote:
> Percpu refcount is the perfect match for partition's case,
> and the conversion is quite straight.
>
> With the convertion, one pair of atomic inc/dec can be saved
> for accounting block I/O, which is run in hot path of block I/O.
>
> Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Acked-by: Tejun Heo <tj@kernel.org>
Thanks.
--
tejun
next prev parent reply other threads:[~2015-07-16 14:36 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-16 3:16 [PATCH 0/4] block: account io: kill atomic operations Ming Lei
2015-07-16 3:16 ` [PATCH 1/4] block: partition: introduce hd_free_part() Ming Lei
2015-07-16 3:16 ` [PATCH 2/4] block: partition: convert percpu ref Ming Lei
2015-07-16 14:36 ` Tejun Heo [this message]
2015-07-16 3:16 ` [PATCH 3/4] block: partition: introduce 'cpu' para to part_inc|dec_in_flight Ming Lei
2015-07-16 3:16 ` [PATCH 4/4] block: account io: convert part->in_fligh[] into percpu variable Ming Lei
2015-07-16 14:40 ` Tejun Heo
2015-07-16 14:48 ` [PATCH 0/4] block: account io: kill atomic operations Jens Axboe
2015-07-16 14:59 ` Tejun Heo
2015-07-16 15:02 ` Jens Axboe
2015-07-16 15:01 ` Ming Lei
2015-07-16 15:09 ` Jens Axboe
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