Re: [patch 1/13] misc fixes

[Daniel Phillips <phillips@arcor.de>]

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.

-- 
Daniel