Re: What to expect with the 2.6 VM

["Martin J. Bligh" <mbligh@aracnet.com>]

> the major reason you didn't mention for remap_file_pages is the rmap
> avoidance. There's no rmap backing the remap_file_pages regions, so the
> overhead per task is reduced greatly and the box stops running oom
> (actually deadlocking for mainline thanks to the oom killer and NOFAIL
> default behaviour). 

Maybe I'm just taking this out of context, and it's twisting my brain,
but as far as I know, the nonlinear vma's *are* backed by pte_chains.
That was the whole problem with objrmap having to do conversions, etc.

Am I just confused for some reason? I was pretty sure that was right ...

M.

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