> BTW, this doesn't seem like a preemption issue, considering that throughput
> is very definitely affected as well as latency.
>
> Anyway, please let me know if there's anything I can do, within my
> constraints, to help. (As you can guess, though, I don't have any kernel
> debugging experience.)
It sounds like the hit you are taking is from highmem and I/O (having to
copy pages lower into memory so the I/O subsystem can use them). Some of
that is in the hard to fix for 2.4 category with the x86. There are some
experimental patches around but they are experimental.
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This archive was generated by hypermail 2b29 : Thu Mar 07 2002 - 21:01:11 EST