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From: Pavel Machek <pavel@ucw.cz>
To: Pierre Ossman <drzeus-list@drzeus.cx>
Cc: huggie@earth.li, linux-kernel@vger.kernel.org
Subject: Re: Scheduler broken? sdhci issues with scheduling
Date: Mon, 3 Mar 2008 21:38:08 +0100	[thread overview]
Message-ID: <20080303203808.GH13869@elf.ucw.cz> (raw)
In-Reply-To: <20080303204300.69cbe392@mjolnir.drzeus.cx>

On Mon 2008-03-03 20:43:00, Pierre Ossman wrote:
> On Sun, 2 Mar 2008 11:40:31 +0100
> Pavel Machek <pavel@ucw.cz> wrote:
> 
> > 
> > Is mmc slow or does it just break down? Slow would be expected, but
> > breaking down should be fixed in MMC, too...
> > 
> 
> The problem is that the kernel sleeps _less_ than asked for, not more. No hardware can be expected to work if its needed delays aren't respected.
> 

Oops, that's bad. Can you perhaps create small testcase for
scheduler/timer people to play with?

Also... you may want to switch timesources. notsc fixed "wait for much
too long" for me.
								Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

  reply	other threads:[~2008-03-03 20:37 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
2008-03-02 18:04   ` Simon Huggins
2008-03-03 19:43   ` Pierre Ossman
2008-03-03 20:38     ` Pavel Machek [this message]
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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