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    SubjectRe: [Fdutils] DMA cache consistency bug introduced in 2.6.28

    > > > 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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