Messages in this thread | | | Date | Sun, 27 Jan 2013 19:35:31 -0800 (PST) | From | Hugh Dickins <> | Subject | Re: [PATCH 5/11] ksm: get_ksm_page locked |
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On Sun, 27 Jan 2013, Simon Jeons wrote: > On Sun, 2013-01-27 at 14:08 -0800, Hugh Dickins wrote: > > On Sat, 26 Jan 2013, Simon Jeons wrote: > > > > > > Why the parameter lock passed from stable_tree_search/insert is true, > > > but remove_rmap_item_from_tree is false? > > > > The other way round? remove_rmap_item_from_tree needs the page locked, > > because it's about to modify the list: that's secured (e.g. against > > concurrent KSM page reclaim) by the page lock. > > How can KSM page reclaim path call remove_rmap_item_from_tree? I have > already track every callsites but can't find it.
It doesn't. Please read what I said above again.
> BTW, I'm curious about > KSM page reclaim, it seems that there're no special handle in vmscan.c > for KSM page reclaim, is it will be reclaimed similiar with normal > page?
Look for PageKsm in mm/rmap.c.
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