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    SubjectRe: [patch 1/3 take2] smaps: extract pte walker from smaps code
    On Wed, Feb 07, 2007 at 12:30:38AM -0800, Christoph Lameter wrote:
    > On Tue, 6 Feb 2007, David Rientjes wrote:
    > > Extracts the page table entry walker from the smaps-specific code in
    > > fs/proc/task_mmu.c. This will be used later for clearing the reference
    > > bits on pages to measure the number of pages accessed over a time period
    > > through /proc/pid/smaps.
    > Clearing reference bits? Ummm... That is a pretty inaccurate measure since
    > reclaim can remove pages and revert the reference bits. It can never work
    > reliably.
    > > The new struct pte_walker includes the struct vm_area_struct of the memory
    > > to walk over. Iteration begins at the start address and completes at the
    > > the end address. A pointer to another data structure may be stored in the
    > > private field such as the struct mem_size_stats, which acts as the smaps
    > > accumulator. For each page table entry in the VMA, the func function is
    > > called with the corresponding struct pte_walker, the pte_t, and its
    > > address.
    > Would it be possible to sync up with the people doing the page table
    > interface?

    Have a pointer to this?

    Mathematics is the supreme nostalgia of our time.
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