linux-kernel - Re: [PATCH 00/23] per device dirty throttling -v8

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Message-ID: <46B4E161.9080100@garzik.org>
Date:	Sat, 04 Aug 2007 16:28:17 -0400
From:	Jeff Garzik <jeff@...zik.org>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
CC:	Ingo Molnar <mingo@...e.hu>,
	Jörn Engel <joern@...fs.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>, linux-mm@...ck.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	miklos@...redi.hu, akpm@...ux-foundation.org, neilb@...e.de,
	dgc@....com, tomoki.sekiyama.qu@...achi.com, nikita@...sterfs.com,
	trond.myklebust@....uio.no, yingchao.zhou@...il.com,
	richard@....demon.co.uk, david@...g.hm
Subject: Re: [PATCH 00/23] per device dirty throttling -v8

Alan Cox wrote:
> In some setups it will and in others it won't. Nor is it the only
> application that has this requirement. Ext3 currently is a standards
> compliant file system. Turn off atime and its very non standards
> compliant, turn to relatime and its not standards compliant but nobody
> will break (which is good)

Linux has always been a "POSIX unless its stupid" type of system.  For 
the upstream kernel, we should do the right thing -- noatime by default 
-- but allow distros and people that care about rigid compliance to 
easily change the default.


(from another message)
> If you want to sort this in Fedora for example you just need to package
> and announce a desktop-tuning rpm which makes the relevant updates on
> install and reverses them on remove. Stick the scheduler/vm tuning values
> in as well and the disk queue tweaks.
> 
> Regardless of the kernel defaults people will install such a package
> en-mass...

<chuckle>  Sounds like an effective idea :)

Though strictly in the context of atime vs. noatime, servers benefit 
from that too, not just desktop.

	Jeff


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