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. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>