linux-kernel - Re: [RFC, PATCH] cfq-iosched: remove redundant queuing detection code

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20091110151431.GI8742@kernel.dk>
Date:	Tue, 10 Nov 2009 16:14:31 +0100
From:	Jens Axboe <jens.axboe@...cle.com>
To:	Corrado Zoccolo <czoccolo@...il.com>
Cc:	Linux-Kernel <linux-kernel@...r.kernel.org>,
	Jeff Moyer <jmoyer@...hat.com>, aaronc@...ato.unsw.edu.au
Subject: Re: [RFC, PATCH] cfq-iosched: remove redundant queuing detection
	code

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

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/