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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?

    I will have a look at that...

    > The page fault codepath acquires both.
    > How often is the page table lock acquired per page fault? Just once or
    > multiple spin_lock calls per page fault? Is the problem contention or
    > cache line trashing?

    The page table lock seems to be acquired at least 2 times and up to 5
    times per page fault.
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