linux-kernel - Re: [PATCH] cfq-iosched: Add documentation about idling [V2]

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] [day] [month] [year] [list]

Date:	Fri, 5 Aug 2011 09:43:40 +0200
From:	Jens Axboe <jaxboe@...ionio.com>
To:	Vivek Goyal <vgoyal@...hat.com>
CC:	linux kernel mailing list <linux-kernel@...r.kernel.org>,
	Shaohua Li <shaohua.li@...el.com>,
	Suresh Jayaraman <sjayaraman@...e.de>,
	Moyer Jeff Moyer <jmoyer@...hat.com>,
	Christoph Hellwig <hch@...radead.org>
Subject: Re: [PATCH] cfq-iosched: Add documentation about idling [V2]

On 2011-08-02 19:40, Vivek Goyal wrote:
> There are always questions about why CFQ is idling on various conditions.
> Recent ones is Christoph asking again why to idle on REQ_NOIDLE. His
> assertion is that XFS is relying more and more on workqueues and is
> concerned that CFQ idling on IO from every workqueue will impact
> XFS badly.
> 
> So he suggested that I add some more documentation about CFQ idling
> and that can provide more clarity on the topic and also gives an
> opprotunity to poke a hole in theory and lead to improvements.
> 
> So here is my attempt at that. Any comments are welcome.

Applied, thanks.

-- 
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/