From: Jeff Moyer <jmoyer@redhat.com>
To: Shaohua Li <shaohua.li@intel.com>
Cc: lkml <linux-kernel@vger.kernel.org>,
Jens Axboe <jaxboe@fusionio.com>,
vgoyal@redhat.com
Subject: Re: [PATCH 1/2]block cfq: don't use atomic_t for cfq_queue
Date: Thu, 23 Dec 2010 10:05:13 -0500 [thread overview]
Message-ID: <x49vd2k7cnq.fsf@segfault.boston.devel.redhat.com> (raw)
In-Reply-To: <1293072333.10593.21.camel@sli10-conroe> (Shaohua Li's message of "Thu, 23 Dec 2010 10:45:33 +0800")
Shaohua Li <shaohua.li@intel.com> writes:
> cfq_queue->ref is used with queue_lock hold, so ref doesn't need to be an atomic
> and atomic operation is slower.
>
> Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Reviewed-by: Jeff Moyer <jmoyer@redhat.com>
next prev parent reply other threads:[~2010-12-23 15:05 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-23 2:45 Shaohua Li
2010-12-23 15:05 ` Jeff Moyer [this message]
2010-12-23 15:16 ` Vivek Goyal
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