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

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Date:	Wed, 9 Sep 2009 02:44:13 +0200
From:	Frans Pop <elendil@...net.nl>
To:	linux-kernel@...r.kernel.org
Cc:	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 Wednesday 09 September 2009, Frans Pop wrote:
> BFS general impression
> ----------------------
> I've used BFS for over a day yesterday and today, and in general I'm
> very impressed. During normal use (coding and testing a shell script
> that's CPU/memory heavy + normal mail/news/browser + amarok) I've not
> seen any strange issues. My notebook even suspended and resumed (StR)
> without any problems.
>
> With CFS I regularly have short freezes of the mouse cursor or when
> typing. I think that it's related to KDE's news reader knode updating
> from my local news server. With CFS I also saw such freezes a few
> times, but they _seemed_ less frequent and less severe. No hard data
> though.

The 2nd CFS should have been BFS here. Sorry.

> But this evening, while I was preparing and running the tests, I've had
> 4 freezes of the desktop. The first two times it was only a partial
> freeze: taskbar was frozen, but I could still switch apps and use the
> graphical console; the last two times it was a full freeze of the
> display and keyboard (incl. e.g. numlock), but in the background
> everything continued to run normally and I could log in over SSH
> without any problem. On reboot some file systems did fail to unmount
> though.
>
> Normally my desktop and X.Org are 100% reliable.

Cheers,
FJP

P.S. I've received a very positive and friendly private reply from Con.
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