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    SubjectRe: APM crashes when IO is going on
    On Fri, 21 Mar 2008, Rafael J. Wysocki wrote:

    > On Friday, 21 of March 2008, Mikulas Patocka wrote:
    > > > > 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.
    >
    > Do you mean IDE_GENERIC/BLK_DEV_GENERIC?

    Compaq Triflex IDE. The computer is Compaq Armada 7400 (Pentium 2/300MHz)

    Mikulas

    > Rafael
    >


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