linux-kernel - Re: [Announce] [patch] Modular Scheduler Core and Completely Fair Scheduler [CFS]

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Message-ID: <20070414160939.GB3099@elte.hu>
Date:	Sat, 14 Apr 2007 18:09:39 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	S.Çağlar Onur <caglar@...dus.org.tr>
Cc:	linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Con Kolivas <kernel@...ivas.org>,
	Nick Piggin <npiggin@...e.de>, Mike Galbraith <efault@....de>,
	Arjan van de Ven <arjan@...radead.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [Announce] [patch] Modular Scheduler Core and Completely Fair Scheduler [CFS]


* S.Çağlar Onur <caglar@...dus.org.tr> wrote:

> > i'm pleased to announce the first release of the "Modular Scheduler 
> > Core and Completely Fair Scheduler [CFS]" patchset:
> 
> Currently im using Linus's current git + your extra patches + CFS for 
> a while. Kaffeine constantly freezes (and uses %80+ CPU time) [1] if i 
> seek forward/backward while its playing a video with some workload 
> (checking out SVN repositories, compiling something). Stopping other 
> process didn't help kaffeine so it stays freezed stated until i kill 
> it.

hm, could you try to strace it and/or attach gdb to it and figure out 
what's wrong? (perhaps involving the Kaffeine developers too?) As long 
as it's not a kernel level crash i cannot see how the scheduler could 
directly cause this - other than by accident creating a scheduling 
pattern that triggers a user-space bug more often than with other 
schedulers.

> [1] http://cekirdek.pardus.org.tr/~caglar/psaux

looks quite weird!

	Ingo
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