linux-kernel - Re: Scheduler broken? sdhci issues with scheduling

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Date:	Mon, 3 Mar 2008 21:38:08 +0100
From:	Pavel Machek <pavel@....cz>
To:	Pierre Ossman <drzeus-list@...eus.cx>
Cc:	huggie@...th.li, linux-kernel@...r.kernel.org
Subject: Re: Scheduler broken? sdhci issues with scheduling

On Mon 2008-03-03 20:43:00, Pierre Ossman wrote:
> On Sun, 2 Mar 2008 11:40:31 +0100
> Pavel Machek <pavel@....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
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