linux-kernel - Re: Do not overload dispatch queue (Was: Re: IO scheduler based IO controller V10)

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Message-Id: <1254694527.7175.14.camel@marge.simson.net>
Date:	Mon, 05 Oct 2009 00:15:27 +0200
From:	Mike Galbraith <efault@....de>
To:	Jens Axboe <jens.axboe@...cle.com>
Cc:	Vivek Goyal <vgoyal@...hat.com>, Ingo Molnar <mingo@...e.hu>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ulrich Lukas <stellplatz-nr.13a@...enparkplatz.de>,
	linux-kernel@...r.kernel.org,
	containers@...ts.linux-foundation.org, dm-devel@...hat.com,
	nauman@...gle.com, dpshah@...gle.com, lizf@...fujitsu.com,
	mikew@...gle.com, fchecconi@...il.com, paolo.valente@...more.it,
	ryov@...inux.co.jp, fernando@....ntt.co.jp, jmoyer@...hat.com,
	dhaval@...ux.vnet.ibm.com, balbir@...ux.vnet.ibm.com,
	righi.andrea@...il.com, m-ikeda@...jp.nec.com, agk@...hat.com,
	akpm@...ux-foundation.org, peterz@...radead.org,
	jmarchan@...hat.com, riel@...hat.com
Subject: Re: Do not overload dispatch queue (Was: Re: IO scheduler based IO
 controller V10)

On Sun, 2009-10-04 at 22:17 +0200, Jens Axboe wrote:
> On Sun, Oct 04 2009, Mike Galbraith wrote:
> > On Sun, 2009-10-04 at 20:38 +0200, Jens Axboe wrote:
> > > On Sun, Oct 04 2009, Mike Galbraith wrote:
> > > > On Sun, 2009-10-04 at 19:39 +0200, Jens Axboe wrote:
> > > > 
> > > > > So I'll commit a change that doesn't do the delay at all, basically it
> > > > > just offset the current code by one slice.
> > > > 
> > > > Ok, when it hits block-for-linus, I'll take it out for a spin.
> > > 
> > > It's committed:
> > > 
> > > http://git.kernel.dk/?p=linux-2.6-block.git;a=commit;h=e00c54c36ac2024c3a8a37432e2e2698ff849594
> > 
> > Looks like a keeper to me :)
> 
> Wonderful, so I take it this passes your 'gut feel' test too? :-)

Heh, yeah.  Box feels good, disk sounds happy.. none of those little
indescribables that make you suddenly go alert.

	-Mike

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