Messages in this thread | | | Subject | Re: [patch] voluntary-preempt-2.6.9-rc2-mm4-S7 | From | Lee Revell <> | Date | Sat, 02 Oct 2004 22:19:37 -0400 |
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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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