Messages in this thread | | | Date | Thu, 23 Jul 2009 20:56:37 -0700 | From | "Moussa A. Ba" <> | Subject | [PATCH 0/1] pagemap clear_refs: modify to specify anon or mapped vma clearing |
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This patch makes the clear_refs proc interface a bit more versatile. It adds support for clearing either anonymous, file mapped pages or both.
echo 1 > /proc/pid/clear_refs clears ANON pages echo 2 > /proc/pid/clear_refs clears file mapped pages echo 3 > /proc/pid/clear_refs clears all pages
Selectively clearing pages has a measurable impact on performance as it decreases the number of page walks. We have been using this interface and this adds flexibility to the user space application implementing the reference clearing.
Moussa.
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