From: Jens Axboe <jens.axboe@oracle.com>
To: Corrado Zoccolo <czoccolo@gmail.com>
Cc: Linux-Kernel <linux-kernel@vger.kernel.org>,
Jeff Moyer <jmoyer@redhat.com>,
aaronc@gelato.unsw.edu.au
Subject: Re: [RFC, PATCH] cfq-iosched: remove redundant queuing detection code
Date: Tue, 10 Nov 2009 16:14:31 +0100 [thread overview]
Message-ID: <20091110151431.GI8742@kernel.dk> (raw)
In-Reply-To: <200911101454.57522.czoccolo@gmail.com>
On Tue, Nov 10 2009, Corrado Zoccolo wrote:
> The core block layer already has code to detect presence of command
> queuing devices. We convert cfq to use that instead of re-doing the
> computation.
There's is the major difference that the CFQ variant is dynamic and the
block layer one is not. This change came from Aaron some time ago IIRC,
see commit 45333d5. It's a bit of a chicken and egg problem.
--
Jens Axboe
next prev parent reply other threads:[~2009-11-10 15:14 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-10 13:54 [RFC, PATCH] cfq-iosched: remove redundant queuing detection code Corrado Zoccolo
2009-11-10 15:03 ` Jeff Moyer
2009-11-10 15:14 ` Jens Axboe [this message]
2009-11-10 15:20 ` Jeff Moyer
2009-11-10 15:27 ` Jens Axboe
2009-11-10 15:41 ` Jeff Moyer
2009-11-10 15:48 ` Jens Axboe
2009-11-10 15:55 ` Jeff Moyer
2009-11-10 17:56 ` Corrado Zoccolo
2009-11-12 12:16 ` Jens Axboe
2009-11-12 13:14 ` Corrado Zoccolo
2009-11-12 13:16 ` Jens Axboe
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