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    SubjectRe: APM crashes when IO is going on
    > > I found another problem --- present in 2.6.23.1, 2.6.25rc3, 2.6.25rc6
    > >
    > > --- when I run three threads concurrently reading raw disk partition and
    > > suspend, I get 100% reproducible failure. (with one thread running it
    > > usually succeeds, sometimes fail)
    >
    > Are they userland threads or kernel threads?

    Useland threads. Just dd if=/dev/hda of=/dev/null

    > > Either the on-going I/O will jam BIOS and I need to remove power to
    > > continue.
    > >
    > > Or the machine suspends, wakes up and reports "hda: lost interrupt"
    > > (2.6.23.1 was able to recover from this condition, 2.6.25rc3,6 does not
    > > recover and it is not able to send any more disk IOs).
    > >
    > > How is suspending disk IO supposed to work?
    >
    > That depends on the driver, if I understand your question correctly.

    The driver is normal IDE.

    > > And why it doesn't?
    >
    > Hard to tell. You didn't provide much information ...
    >
    > Thanks,
    > Rafael

    Mikulas


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