There's not only one way to lose interrupts. I was losing them on my
IDE interface when I upgraded to a fast disk on my slow 486/33
machine. I had slews of checksum errors until I finally figured out
why it was happening, tried "hdparm -u1" to enable interrupts during
IDE transfers, and watched my checksum errors disappear.
The only reason I suggested the SCSI interface as the culprit is
because it underwent exactly the right kind of modification around the
time Peter was talking about.
Of course, it's possible that *other* parts of the kernel underwent
changes that increased interrupt latency.
Kevin <buhr@stat.wisc.edu>
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