linux-kernel - Re: [long] Another BFS versus CFS shakedown

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Date:	Wed, 09 Sep 2009 03:01:17 +0300
From:	Nikos Chantziaras <realnc@...or.de>
To:	Frans Pop <elendil@...net.nl>
CC:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Jens Axboe <jens.axboe@...cle.com>
Subject: Re: [long] Another BFS versus CFS shakedown

On 09/09/2009 02:42 AM, Frans Pop wrote:
> But this evening, while I was preparing and running the tests, I've had 4
> freezes of the desktop.

Unfortunately BFS doesn't provide a reliable way (yet?) to run such 
tests on it.  This might be the cause for the hangs (from bfs-faq.txt):

   Currently known problems?
   [...]
   3. Stuck tasks after extensive use of trace functions
   (ptrace etc.).
   [...]
   5. More likely to show up bugs in *other* code due to
   being much more aggressive at using multiple CPUs so
   race conditions will show up more frequently.
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