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SubjectRe: [PATCH] CPU hot swap for 2.4.3 + s390 support
> Adding memory probably isn't going to be too hard... but taking
> existing memory off line is tricky. You have to find some way of
> finding all the pages that are in use and then dealing with them
> appropriately, and when some are locked or contain kernel data this
> would be extremely difficult I should think.

Wouldn't that be lot of the same issues as a "swapoff" with some portion of
that in use? (except for the kernel data case of course...)

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