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

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Message-ID: <20080313211749.GN28693@paranoidfreak.co.uk>
Date:	Thu, 13 Mar 2008 21:17:49 +0000
From:	Simon Huggins <huggie@...th.li>
To:	Pierre Ossman <drzeus-list@...eus.cx>
Cc:	Pavel Machek <pavel@....cz>, linux-kernel@...r.kernel.org
Subject: Re: Scheduler broken? sdhci issues with scheduling

'ello Pierre

On Mon, Mar 03, 2008 at 10:05:30PM +0100, Pierre Ossman wrote:
> On Mon, 3 Mar 2008 21:38:08 +0100
> Pavel Machek <pavel@....cz> wrote:
> > On Mon 2008-03-03 20:43:00, Pierre Ossman wrote:
> > > 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.
> I'm afraid I could never reproduce the problem. So it's Simon that
> will have to do the tests for now..

I'm happy to test bits.  What do I need to do to switch time sources for
instance?


Simon

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