> > > 3 - beware of mapping between incore addresses and compressed addresses.
> > Linux does not swap 'incore' addresses, so 3) is a non-issue.
>
> I meant "virtual addresses" vs "location in compressed swap".
> Currently this info is kept IIRC in the pagetable and doesn't incur
> any fragmentation. With compression, this can get noticeably nastier.
i dont see the problem. You map out the page, when the thread accesses it
we uncompress it in the page fault handler and map it back in.
-- mingo
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