Messages in this thread |  | | Date | Fri, 9 Feb 2007 10:15:49 -0600 | From | Matt Mackall <> | Subject | Re: [patch 1/3 take2] smaps: extract pte walker from smaps code |
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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?
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