Re: Page table sharing

[Martin J. Bligh]

> I'm not sure how relevant page table sharing has to the halloween 
> deadline since it's not a feature per se, just an optimization.   
> It has more to do with getting numa ia32 boxes to survive, so it's 
> an ideal out-of-tree patch.

Any large 32 bit box with significant numbers of processes will need 
it to cope with the bloat that rmap introduced - this has nothing to
do with NUMA (some apps may be saved by large pages, some not). 
Avoiding hangs from ZONE_NORMAL oom is not an "optimisation", and I 
doubt optimisations involving major VM changes would be very welcome
after the freeze. This is something we need to get working ASAP ...

M.