Messages in this thread | | | Date | Wed, 7 Feb 2007 00:30:38 -0800 (PST) | From | Christoph Lameter <> | Subject | Re: [patch 1/3 take2] smaps: extract pte walker from smaps code |
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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?
Could we somehow consolidate smaps and numa_maps?
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