linux-kernel - Re: Linux 2.6.23-rc9 and a heads-up for the 2.6.24 series..

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Date:	Wed, 3 Oct 2007 10:19:38 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Mel Gorman <mel@...net.ie>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	akpm@...ux-foundation.org
Subject: Re: Linux 2.6.23-rc9 and a heads-up for the 2.6.24 series..


* Mel Gorman <mel@...net.ie> wrote:

> On (02/10/07 14:15), Ingo Molnar didst pronounce:
> > 
> > * Mel Gorman <mel@....ul.ie> wrote:
> > 
> > > Dirt. Booting with "profile=sleep,2" is broken in 2.6.23-rc9 and 
> > > 2.6.23-rc8 but working in 2.6.22. I was checking it out as part of a 
> > > discussion in another thread and noticed it broken in -mm as well 
> > > (2.6.23-rc8-mm2). Bisect is in progress but suggestions as to the 
> > > prime candidates are welcome or preferably, pointing out that I'm an 
> > > idiot because I missed twiddling some config change.
> > 
> > Mel, does the patch below fix this bug for you? (Note: you will need to 
> > enable CONFIG_SCHEDSTATS=y too.)
> 
> Nice one Ingo - got it first try. The problem commit was 
> dd41f596cda0d7d6e4a8b139ffdfabcefdd46528 and it's clear that the code 
> removed in this commit is put back by this latest patch.  When 
> applied, profile=sleep works as long as CONFIG_SCHEDSTAT is set.

great - thanks for testing it. I'm glad you caught it as sleep=profile 
is pretty useful in "why is my system so slow" tests. (which problems 
are usually reported _after_ a stable kernel is released ...)

	Ingo
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