Messages in this thread | | | Date | Mon, 03 Aug 2009 19:00:32 +0300 | From | Izik Eidus <> | Subject | Re: [PATCH 4/12] ksm: break cow once unshared |
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Hugh Dickins wrote: > We kept agreeing not to bother about the unswappable shared KSM pages > which later become unshared by others: observation suggests they're not > a significant proportion. But they are disadvantageous, and it is easier > to break COW to replace them by swappable pages, than offer statistics > to show that they don't matter; then we can stop worrying about them. > > Doing this in ksm_do_scan, they don't go through cmp_and_merge_page on > this pass: give them a good chance of getting into the unstable tree > on the next pass, or back into the stable, by computing checksum now. > > Signed-off-by: Hugh Dickins <hugh.dickins@tiscali.co.uk> > --- ACK
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