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    SubjectRe: [patch] voluntary-preempt-2.6.9-rc2-mm4-S7
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    On Sat, 2004-10-02 at 22:14, Lee Revell wrote:
    > On Sat, 2004-10-02 at 22:01, Lee Revell wrote:
    > > On Mon, 2004-09-27 at 20:05, Ingo Molnar wrote:
    > > > i've released the -S7 VP patch:
    > > >
    > > > http://redhat.com/~mingo/voluntary-preempt/voluntary-preempt-2.6.9-rc2-mm4-S7
    > > >
    > >
    > > I believe we have found a bug. A user reported massive xruns with S7,
    > > they turned out to be printk() overhead from tons of "using
    > > smp_processor_id() in preemptible code" errors. The trace below repeats
    > > over and over. Looks like raid0 is the problem.
    >
    > The exact configuration is 4 SCSI drives in a raid 0, and a single IDE
    > drive. The raid0 code apparently is not preempt safe.

    s/preempt safe/preempt+SMP safe/. System is a dual PIII-600.

    Lee

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