Hi All,
we have a number of systems with the Supermicro P6DBE (v2) and
2x350 MHz processors. Since upgrading these to 2.2.x kernels we have found
that under conditions of heavy nfs load the client machine can get into a
state of very poor network (and system) responce. The only messages which
appear in log are of the type:
Sep 13 10:13:36 xxxxxxx kernel: nfs: server yyyyyy not responding, still trying
Sep 13 10:13:43 xxxxxxx kernel: nfs: task 23644 can't get a request slot
which appear anyway when there isn't problems.
With the IO-APIC disabled...using the noapic option....the systems run without
problems (as the did with 2.0.x kernels ) and don't produce any of the above
messages. The problems have appeared with alll the 2.2.x kernels
we have tried and 3 different tulip ethernet cards. With a via-rhine card the
system would tend to hang rather than go slow. We don't see such problems
on other systems with the P6DLE and ASUS P2-D boards and therefore strongly
suspect that there is a problem with this the IO-APIC on this particular board.
Has anyone else seen similar problems and found a solution?
cheers,
Alex Martin
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