Re: hugepage patches

"Martin J. Bligh" [off-list ref] writes:

quoted

Did I misunderstand what was meant by a massively shared mapping?

I can't imagine it being useful to guys like oracle without MAP_SHARED
support....

Create a huge shmem segment. and don't share the pagetables. Without large
pages, it's an enormous waste of space in mindless duplication. With large
pages, it's a much smaller waste of space (no PTEs) in mindless
duplication. 
Still not optimal, but makes the problem manageable.

And this is exactly the mmap(MAP_SHARED) case.  Where a single memory
segment is shared between multiple mm's. 

Eric


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