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    SubjectRe: NFS mountned directory and apache2 (2.5.47)
    On Fri, Nov 15, 2002 at 09:16:16PM +0100, Trond Myklebust wrote:
    > >>>>> " " == Petr Vandrovec <VANDROVE@vc.cvut.cz> writes:
    >
    > > It does not change anything on the brokeness of apache2 (or
    > > maybe glibc). It must be able to revert to read/write loop if
    > > sendfile fails with EINVAL. There is no guarantee that existing
    > > sendfile() API means that you can use it with all filesystems.
    >
    > I disagree. Sendfile can *always* be emulated using the standard file
    > 'read' method.

    Linus removed that in early 2.5 because it led to kmap() deadlocks.
    sendfile can fail with EINVAL and userspace must not rely on it
    working on any object.

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