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    SubjectRe: [RFC][PATCH 6/8] mm: handle_speculative_fault()


    On Tue, 5 Jan 2010, Al Viro wrote:
    >
    > - a bunch of fs operations done from RCU callbacks. Including severely
    > blocking ones.

    Yeah, you're right (and Peter also pointed out the might_sleep). That is
    likely to be the really fundamental issue.

    You _can_ handle it (make the RCU callback just schedule the work instead
    of doing it directly), but it does sound really nasty. I suspect we should
    explore just about any other approach over this one.

    Linus


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