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    SubjectRe: [patch 1/2] mm: dont clear PG_uptodate in invalidate_complete_page2()
    Linus Torvalds wrote:
    > I also really don't think this even fixes the problems you have with
    > FUSE/NFSD - because you'll still be reading zeroes for a truncated file.
    > Yes, you get the rigth counts, but you don't get the right data.
    ...
    > That's "correct" from a splice() kind of standpoint (it's essentially a
    > temporary mmap() with MAP_PRIVATE), but the thing is, it just sounds like
    > the whole "page went away" thing is a more fundamental issue. It sounds
    > like nfds should hold a read-lock on the file while it has any IO in
    > flight, or something like that.

    I'm thinking any kind of user-space server using splice() will not
    want to transmit zeros either, when another process truncates the file.
    E.g. Apache, Samba, etc.

    Does this problem affect sendfile() users?

    -- Jamie


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