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From: Marcelo Tosatti <marcelo.tosatti@cyclades.com>
To: Con Kolivas <kernel@kolivas.org>
Cc: Peter Williams <pwil3058@bigpond.net.au>,
	Helge Hafting <helgehaf@aitel.hist.no>,
	Trond Myklebust <trond.myklebust@fys.uio.no>,
	Ingo Molnar <mingo@elte.hu>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] sched: Fix adverse effects of NFS client on interactive response
Date: Wed, 4 Jan 2006 08:31:16 -0200	[thread overview]
Message-ID: <20060104103115.GA6181@dmt.cnet> (raw)
In-Reply-To: <200601042318.02028.kernel@kolivas.org>

On Wed, Jan 04, 2006 at 11:18:01PM +1100, Con Kolivas wrote:
> On Wednesday 04 January 2006 20:40, Marcelo Tosatti wrote:
> > We suspected that the TASK_INTERACTIVE() logic in kernel/sched.c would
> > be moving some processes directly to the active list, thus starving some
> > others. So we set the nice value of all 48 processes to "nice +19" to
> > disable TASK_INTERACTIVE() and the starvation is gone. However with +19
> > it becomes impossible to use the box interactively while the test runs,
> > which is the case with the default "0" nice value.
> >
> > Are there significant changes between v2.6.11 -> v2.6.14 aimed at fixing
> > this problem?
> 
> The SCHED_BATCH policy Ingo has implemented should help just such a problem.

Yeap, he sent me the patch (which I promised to test), but still haven't. 

Will do ASAP.


  reply	other threads:[~2006-01-04 12:31 UTC|newest]

Thread overview: 55+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-12-21  6:00 [PATCH] sched: Fix adverse effects of NFS client on interactive response Peter Williams
2005-12-21  6:09 ` Trond Myklebust
2005-12-21  6:32   ` Peter Williams
2005-12-21 13:21     ` Trond Myklebust
2005-12-21 13:36       ` Kyle Moffett
2005-12-21 13:40         ` Trond Myklebust
2005-12-22  2:26           ` Peter Williams
2005-12-22 22:08             ` Trond Myklebust
2005-12-22 22:33               ` Peter Williams
2005-12-22 22:59                 ` Trond Myklebust
2005-12-23  0:02                   ` Kyle Moffett
2005-12-23  0:25                     ` Trond Myklebust
2005-12-23  3:06                       ` Peter Williams
2005-12-23  9:39                         ` Trond Myklebust
2005-12-23 10:49                           ` Peter Williams
2005-12-23 12:51                             ` Trond Myklebust
2005-12-23 13:36                               ` Peter Williams
2006-01-02 12:09                                 ` Pekka Enberg
2005-12-23 19:07                           ` Lee Revell
2005-12-23 21:08                             ` Trond Myklebust
2005-12-23 21:17                               ` Lee Revell
2005-12-23 21:23                                 ` Trond Myklebust
2005-12-23 22:04                                   ` Lee Revell
2005-12-23 22:10                                     ` Trond Myklebust
2005-12-21 16:10         ` Horst von Brand
2005-12-21 20:36           ` Kyle Moffett
2005-12-21 22:59             ` Peter Williams
2005-12-21 16:11     ` Ingo Molnar
2005-12-21 22:49       ` Peter Williams
2006-01-02 11:01     ` Helge Hafting
2006-01-02 23:54       ` Peter Williams
2006-01-04  1:25         ` Peter Williams
2006-01-04  9:40           ` Marcelo Tosatti
2006-01-04 12:18             ` Con Kolivas
2006-01-04 10:31               ` Marcelo Tosatti [this message]
2006-01-04 21:51           ` Peter Williams
2006-01-05  6:31             ` Mike Galbraith
2006-01-05 11:31               ` Peter Williams
2006-01-05 14:31                 ` Mike Galbraith
2006-01-05 23:13                   ` Peter Williams
2006-01-05 23:33                     ` Con Kolivas
2006-01-06  0:02                       ` Peter Williams
2006-01-06  0:08                         ` Con Kolivas
2006-01-06  0:40                           ` Peter Williams
2006-01-06  7:39                     ` Mike Galbraith
2006-01-07  1:11                       ` Peter Williams
2006-01-07  5:27                         ` Mike Galbraith
2006-01-07  6:34                           ` Peter Williams
2006-01-07  8:54                             ` Mike Galbraith
2006-01-07 23:40                               ` Peter Williams
2006-01-08  5:51                                 ` Mike Galbraith
2006-01-07  9:30                           ` Con Kolivas
2006-01-07 10:23                             ` Mike Galbraith
2006-01-07 23:31                             ` Peter Williams
2006-01-08  0:38                               ` Con Kolivas

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