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From: Pavel Machek <pavel@ucw.cz>
To: huggie@earth.li, linux-kernel@vger.kernel.org
Subject: Re: Scheduler broken? sdhci issues with scheduling
Date: Sun, 2 Mar 2008 11:40:31 +0100	[thread overview]
Message-ID: <20080302104031.GB3861@ucw.cz> (raw)
In-Reply-To: <20080229115256.GG24533@paranoidfreak.co.uk>

On Fri 2008-02-29 11:52:57, Simon Huggins wrote:
> [ Please Cc me on replies ]
> 
> I had a bug with sdhci which Pierre Ossman looked at for me.
> 
> In the end essentially the fix was to use HZ=1000 and nothing else.
> Pierre seemed to think that this was a bug in the scheduler.
> 
> I'm interested if someone who groks the scheduler could take a look at
> the mmc/* code and see if it's abusing HZ or if there's anything
> obviously wrong there.  If it's not then perhaps there really is a bug
> in the scheduler?

Is mmc slow or does it just break down? Slow would be expected, but
breaking down should be fixed in MMC, too...

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

  parent reply	other threads:[~2008-03-02 15:43 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-29 11:52 Simon Huggins
2008-02-29 13:34 ` Ingo Molnar
2008-02-29 13:51   ` Ingo Molnar
2008-02-29 14:00     ` Ingo Molnar
2008-02-29 19:39       ` Simon Huggins
2008-02-29 20:39         ` Ingo Molnar
2008-03-01 12:42           ` Simon Huggins
2008-03-01 14:08             ` Pierre Ossman
2008-03-02 10:40 ` Pavel Machek [this message]
2008-03-02 18:04   ` Simon Huggins
2008-03-03 19:43   ` Pierre Ossman
2008-03-03 20:38     ` Pavel Machek
2008-03-03 21:05       ` Pierre Ossman
2008-03-13 21:17         ` Simon Huggins
2008-03-15 15:04           ` Pierre Ossman
2008-04-20 21:07             ` Simon Huggins

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