Messages in this thread | | | From | Daniel Phillips <> | Subject | Re: [patch 1/13] misc fixes | Date | Tue, 30 Jul 2002 12:18:33 +0200 |
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On Monday 29 July 2002 22:00, Andrew Morton wrote: > > For this to work, anon pages will need to have something in page->index. > > This isn't too much of a challenge. A reasonable value to put in there is > > the creator's virtual address, shifted right, and perhaps mangled a little to > > reduce contention. > > Well you want the likely-to-be-temporally-adjacent anon pages to > use the same lock. So maybe > > page->index = some_global_int++;
Actually, thinking again... the nice thing about this scheme is the opportunity to take the lock once for a whole batch of add_rmaps while walking through a page table, and the same for remove_rmap. So it definitely wants to be based on the virtual address.
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