Messages in this thread | | | Date | Thu, 30 Jan 2003 19:59:44 +0300 | From | Ivan Kokshaysky <> | Subject | Re: pci_set_mwi() ... why isn't it used more? |
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On Thu, Jan 30, 2003 at 08:25:07AM -0800, David Brownell wrote: > At least on 2.5.59, the pci_generic_prep_mwi() code doesn't check > for that type of error: it just writes the cacheline size, and > doesn't verify that setting it worked as expected. Checking for > that kind of problem would make it safer to call pci_set_mwi() in > such cases ... e.g. using it on a P4 with 128 byte L1 cachelines > would fail cleanly, while on an Athlon (64 byte L1) it might work > (depending in which top bits are unusable).
Hmm, what happens if you boot the kernel configured for 80386 on P4 and enable MWI?
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