Messages in this thread |  | | | Date | Tue, 27 Sep 2011 22:20:21 +0530 | | Subject | Re: [PATCH 0/8] idle page tracking / working set estimation | | From | Balbir Singh <> |
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>> >> Sorry, I have trouble parsing this sentence, could you elaborate on "when"? > > page_referenced() indicates if a page was accessed since the previous > page_referenced() call. > > page_referenced_kstaled() indicates if a page was accessed since the > previous page_referenced_kstaled() call. > > Both of the functions need to clear PTE young bits; however we don't > want the two functions to interfere with each other. To achieve this, > we add two page bits to indicate when a young PTE has been observed by > one of the functions but not by the other.
OK and this gives different page aging schemes for the same page? Is this to track state changes
PR1 sees: PTE x young as 0 PR2 sees: PTE x as 1, the rest to 0
so PR1 and PR2 will disagree? Should I be looking deeper in the patches to understand
Balbir
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