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    SubjectRe: PROBLEM: Oops when using both channels of the PDC20262
    On Saturday 24 April 2004 00:30, Sebastian Witt wrote:
    > Hello,
    > I'm getting some Oopses with kernel 2.6.5 when there is high load on
    > both channels of a Promise PDC20262 (Ultra66) card on a SMP machine
    > (Tyan S1834, Via Apollo Pro chipset).

    I recall similar report. Reporter found that there is a #define
    in the source which can be enabled to make driver serialize access
    to channels. That 'fixed' (most probably worked around, though)
    the problem.

    I can't say whether it was a hardware or driver problem,
    I didn't look into it.

    > There are no problems when I use 2.6.1, but I have this problem
    > since 2.6.2.
    > It only occurs when I use the PDC20262, not when using the onboard
    > IDE-controller.
    > It is reproduceable after a few seconds when I use 'dd if=/dev/hde
    > of=/dev/hdh bs=512'.
    > Using of=/dev/null also works, but it takes longer.
    > Mostly it reports smp_apic_timer_interrupt+1c/140, but the last time
    > I tried it, it also reports <__mask_IO_APIC_irq+40/e0>.
    > I've attached the logs and the ksymoops trace.

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