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    SubjectRe: [RFC] page fault retry with NOPAGE_RETRY
    On Fri, 15 Sep 2006, Andrew Morton wrote:
    >
    > This assumes that no other heavyweight process will try to modify this
    > single-threaded process's mm. I don't _think_ that happens anywhere, does
    > it? access_process_vm() is the only case I can think of,

    "Modify" in the sense of fault into.
    Yes, access_process_vm() is all I can think of too.

    > and it does down_read(other process's mmap_sem).

    If there were anything else, it'd have to do so too (if not down_write).

    I too like NOPAGE_RETRY: as you've both observed, it can help to solve
    several different problems.

    Hugh
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