Messages in this thread | | | Date | Thu, 4 Feb 2010 18:47:15 +0100 | From | Andrea Arcangeli <> | Subject | Re: [PATCH] emulate accessed bit for EPT |
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On Thu, Feb 04, 2010 at 08:40:43AM -0500, Rik van Riel wrote: > I suspect it won't be very many. I have been monitoring > /proc/meminfo on my system while testing this patch, and > it is quite typical that the size of the inactive anon > list does not change for minutes at a time. > > In other words, no pages are moved onto or off of the > inactive anon list for several minutes. That corresponds > to a very small number of minor faults introduced by my > patch.
When there's light VM pressure, ideally there should be zero overhead caused by the patch. When there is VM pressure this will avoid some unnecessary I/O which should outweight the minor faults. It should be a good default behavior.
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