linux-kernel - Re: Poor desktop responsiveness with background I/O-operations

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Message-Id: <1253619120.13917.21.camel@marge.simson.net>
Date:	Tue, 22 Sep 2009 13:32:00 +0200
From:	Mike Galbraith <efault@....de>
To:	Henrique de Moraes Holschuh <hmh@....eng.br>
Cc:	James Cloos <cloos@...loos.com>,
	lkml <linux-kernel@...r.kernel.org>,
	Ulrich Lukas <stellplatz-nr.13a@...enparkplatz.de>
Subject: Re: Poor desktop responsiveness with background I/O-operations

On Tue, 2009-09-22 at 08:22 -0300, Henrique de Moraes Holschuh wrote:
> On Tue, 22 Sep 2009, Mike Galbraith wrote:
> > On Tue, 2009-09-22 at 09:06 +0200, Mike Galbraith wrote:
> > > I don't know if distros provide a tool that supports SCHED_IDLE, if so,
> > > you can use that to set both CPU and IO usage to IDLE class in one go.
> > 
> > P.S.  I just remembered, don't use SCHED_IDLE with kernels < 2.6.28.
> > There are two patches wrt this scheduling class which did not go to the
> > stable trees less than 2.6.28.
> 
> Since 2.6.27 is long-term, maybe they should be sent to 2.6.27?  It is weird
> to have a long-term stable kernel for which the recommendation is "don't use
> SCHED_IDLE".

Yeah, that's what I thought too, but apparently maintainers didn't think
SCHED_IDLE was common/important enough.

	-Mike

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