torvalds@transmeta.com said:
> > I thought the prefetches API intended this to be a safe operation?
> Well, any _sane_ prefetch API would be safe.
> However, there is known-broken hardware out there, in which a prefetch
> from IO space will kill the machine.
If you prefetch off the end of your object, and the thing you end up
prefetching is a DMA buffer which we'd just nuked from our cache to allow
the device to DMA into it, something's going to be unhappy regardless of
whether your prefetch faults or not.
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This archive was generated by hypermail 2b29 : Wed Aug 07 2002 - 22:00:21 EST