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    SubjectRe: page fault fastpath: Increasing SMP scalability by introducing pte locks?
    On Mon, 16 Aug 2004, Ray Bryant wrote:

    > Something else to worry about here is mm->rss. Previously, this was updated
    > only with the page_table_lock held, so concurrent increments were not a
    > problem. rss may need to converted be an atomic_t if you use pte_locks.
    > It may be that an approximate value for rss is good enough, but I'm not sure
    > how to bound the error that could be introduced by a couple of hundred
    > processers handling page faults in parallel and updating rss without locking
    > it or making it an atomic_t.

    Correct. There are a number of issues that may have to be addressed but
    first we need to agree on a general idea how to proceed.

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