Messages in this thread |  | | Date | Sun, 14 Oct 2001 16:30:29 -0700 | From | Benjamin Redelings I <> | Subject | VM question: side effect of not scanning Active pages? |
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Hello, In both Andrea and Rik's VM, I have tried modifying try_to_swap_out so that a page would be skipped if it is "active". For example, I have currently modified 2.4.13-pre2 by adding:
if (PageActive(page)) return 0;
after testing the hardware referenced bit. This was motivated by sections of VM-improvement patches written by both Rik and Andrea. This SEEMS to increase performance, but it has another side effect. The RSS of unused daemons no longer EVER drops to 4k, which it does without this modification. The RSS does decrease (usually) to the value of shared memory, but the amount of shared memory only gets down to about 200-300k instead of decreasing to 4k. Can anyone tell me why not scanning Active page for swapout would have this effect? Thanks!
-BenRI -- "I will begin again" - U2, 'New Year's Day' Benjamin Redelings I <>< http://www.bol.ucla.edu/~bredelin/
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