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

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Message-ID: <20090922112246.GA23987@khazad-dum.debian.net>
Date:	Tue, 22 Sep 2009 08:22:46 -0300
From:	Henrique de Moraes Holschuh <hmh@....eng.br>
To:	Mike Galbraith <efault@....de>
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, 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".

-- 
  "One disk to rule them all, One disk to find them. One disk to bring
  them all and in the darkness grind them. In the Land of Redmond
  where the shadows lie." -- The Silicon Valley Tarot
  Henrique Holschuh
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