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From: Artur Skawina <>
To: Con Kolivas <>
Cc: Jeffrey Hundstad <>,
	linux list <>,
	ck list <>, Ingo Molnar <>,
	Andrew Morton <>
Subject: Re: [PATCH] sched: rsdl check for niced tasks lowering prio level
Date: Thu, 22 Mar 2007 14:34:55 +0100	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

Con Kolivas wrote:
> Here is the best fix for the bug pointed out. Thanks.

> Ensure niced tasks are not inappropriately limiting sleeping unniced tasks
> by explicitly checking what the best static priority that has run this
> major rotation was.

yes, this made the machine usable again.

After noticing that the context switch rate during a "nice -19 make
-j2" has now been halved vs stock 2.6.20, compiled a kernel under
both and RSDL w/these two patches was 2% faster; so this may be the
right direction after all :)


  reply	other threads:[~2007-03-22 13:41 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-03-21 17:29 [PATCH] sched: rsdl improvements Con Kolivas
2007-03-21 23:27 ` Artur Skawina
2007-03-21 23:48   ` Jeffrey Hundstad
2007-03-22  0:15     ` Artur Skawina
2007-03-22  0:24     ` Con Kolivas
2007-03-22  0:52       ` Con Kolivas
2007-03-22  2:04         ` [PATCH] sched: rsdl check for niced tasks lowering prio level Con Kolivas
2007-03-22 13:34           ` Artur Skawina [this message]
2007-03-21 23:36 ` [PATCH] sched: rsdl improvements Andrew Morton
2007-03-22  5:03   ` Con Kolivas
2007-03-22 14:46 ` Christian

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