Kernel: question/bug: mm/vmscan.c : refill_inactive_zone() : 2.4.18-3

From: Erblichs (erblichs@earthlink.net)
Date: Thu Dec 05 2002 - 17:36:44 EST


Statement:

        In a "while" loop we are looking for a target number of
        pages to deactivate.

Question?
        If there are a large number of processes that have not
        exceeded their Resident Set Size (rss) and they are
        keeping their pages hot, then we won't reach our target
        value. This would keep our inactive page list small.

Suggestion and solution:
        In this environment, I would think it would make sense
        to effectively walk this list again (without aging)
        and effectively half the rss so we are able to reach
        our target value.

        I would think that this approach would then penalize
        all tasks equally. If halving the rss is too extreme,
        then an increased percentage (< 100%) would walk more
        pages to reach the target value.

        Mitchell Erblich : erblichs@earthlink.net
        Note: I am not currently on this mail alias.
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