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    SubjectRe: alpha iommu fixes
    On Mon, May 21, 2001 at 03:34:50AM -0700, David S. Miller wrote:
    > Andi Kleen writes:
    > > [BTW, the 2.4.4 netstack does not seem to make any attempt to handle the
    > > pagecache > 4GB case on IA32 for sendfile, as the pci_* functions are dummies
    > > here. It probably needs bounce buffers there for this case]
    > egrep illegal_highdma net/core/dev.c

    There is just no portable way for the driver to figure out if it should
    set this flag or not. e.g. acenic.c gets it wrong: it is unconditionally
    set even on IA32. Currently it requires an architecture ifdef to set properly.

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