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    SubjectRe: page fault fastpath: Increasing SMP scalability by introducing pte
    On Sun, 15 Aug 2004, Manfred Spraul wrote:

    > Very odd. Why do you see a problem with the page_table_lock but no
    > problem from the mmap semaphore?

    Because there is a only a down_read() call for the mmap semaphore before
    invoking handle_mm_fault. This is a rw semaphore which means that multiple
    processors/processes may be entering handle_mm_fault with a read lock on
    the mmap semaphore.
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