From: jak@rudolph.ccur.com (Joe Korty)
To: alan@lxorguk.ukuu.org.uk (Alan Cox)
Cc: joe.korty@ccur.com, marcelo@conectiva.com.br, mingo@elte.hu,
alan@lxorguk.ukuu.org.uk, torvalds@transmeta.com,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] 2.4.18 scheduler bugs
Date: Fri, 15 Mar 2002 16:26:59 -0500 (EST) [thread overview]
Message-ID: <200203152126.VAA27719@rudolph.ccur.com> (raw)
In-Reply-To: <E16lzQW-0004j4-00@the-village.bc.nu> from "Alan Cox" at Mar 15, 2002 09:39:52 PM
>> - ksoftirqd() - change daemon nice(2) value from 19 to -19.
>>
>> SoftIRQ servicing was less important than the most lowly of batch
>> tasks. This patch makes it more important than all but the realtime
>> tasks.
>
> Bad idea - the right fix to this is to stop using ksoftirqd so readily
> under load. If it bales after 20 iterations life is good. As shipped life
> is bad.
>
> Once ksoftirq triggers its because we are seriously overloaded (or without
> fixing its use slightly randomly). In that case we want other stuff to
> do work before we potentially unleash the next flood.
That certainly makes sense. Thanks.
Joe
next prev parent reply other threads:[~2002-03-15 21:29 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-03-15 20:54 Joe Korty
2002-03-15 19:55 ` Ingo Molnar
2002-03-15 21:25 ` Joe Korty
2002-03-15 20:35 ` Ingo Molnar
2002-03-15 21:58 ` Alan Cox
2002-03-15 20:42 ` Ingo Molnar
2002-03-15 21:59 ` Joe Korty
2002-03-15 20:57 ` Ingo Molnar
2002-03-15 22:14 ` Joe Korty
2002-03-15 23:50 ` Mike Kravetz
2002-03-16 9:23 ` Ingo Molnar
2002-03-15 21:39 ` Alan Cox
2002-03-15 21:26 ` Joe Korty [this message]
2002-03-19 2:08 ` Rob Landley
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