Messages in this thread | | | Date | Sun, 27 Dec 2009 12:09:48 +0100 | From | Pavel Machek <> | Subject | Re: [Fdutils] DMA cache consistency bug introduced in 2.6.28 |
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> > > This might suggest that Mark's floppy controller doesn't like > > > deep C? Mark, did you try booting with processor.max_cstate=1 > > > and HPET enabled? > > > > We have indeed had historical issues with floppy and sleep states before. > > I removed that code when moving to 64bit (floppy driver disabling C1), > but perhaps we need some variant of it again (but it's the first such > report in many years). Although it would be sad to have it again on all > systems.
C1 is hlt. Are you sure? I could see how C3 could cause problems (DMA latency), but...
Can mark simply try with idle=poll?
Pavel
-- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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