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    SubjectRe: [PATCH] BUG(): sched.c: Line 944
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    On Tue, 2002-09-17 at 13:23, Robert Love wrote:
    > On Tue, 2002-09-17 at 14:57, Ingo Molnar wrote:
    >
    > > i'd do (a). current->state is to be used anyway, and the default-untaken
    > > first branch should be cheap. Plus by moving things down the splitup of
    > > the function would create more code duplication than necessery i think.
    >
    > Note by moving it down, the only gain over keeping it at the top is not
    > having to check for the BKL...
    >
    > Anyhow, I would appreciate it if you could give this a try (with kernel
    > preemption enabled)... any comments are appreciated.
    >
    > (Note you need a 2.5.35-bk release to get the dump_stack(). Otherwise
    > use show_trace(0).)
    >
    > Robert Love
    >
    I applied that patch to 2.5.35-bk3 and with PREEMPT enabled. And it
    booted without any of the usual complaints with preempt and the
    in_atomic check. But then, I ran

    1) dbench 1 OK
    2) dbench 2 OK
    3) dbench 3 blam!

    Running dbench 3 resulted in the dbench clients hanging and being
    unkillable with kill -9 in the D state.

    steven 1046 0.0 0.0 1440 472 ? D 13:46 0:00 ./dbench 3
    steven 1047 0.0 0.0 1440 420 ? D 13:46 0:00 ./dbench 3
    steven 1048 0.0 0.0 1440 472 ? D 13:46 0:00 ./dbench 3

    I can ssh and enter my user password, but it hangs after that with
    no bash prompt. Other ssh sessions which I started previously are still
    responsive.

    Test box is 2-way pIII, kernel SMP.

    Steven

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