On Tue, 9 Aug 2005, Benjamin Herrenschmidt wrote:

quoted

But you don't mind if they are refcounted, do you?
Just so long as they start out from 1 so never get freed.

Well, a refcounting bug would let them be freed and kaboom ... That's
why a "PG_not_your_ram_dammit" bit would be useful. It could at least
BUG_ON when refcount reaches 0 :)

Okay, great, let's give every struct page two refcounts,
so if one of them goes wrong, the other one will save us.

Hugh
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