On Wed, Aug 07, 2013 at 01:21:56PM -0700, Andrew Morton wrote: > > > > One of the problem was to find a place in pte entry where we can > > save the _PTE_SWP_SOFT_DIRTY bit while page is in swap. The > > _PAGE_PSE was chosen for that, it doesn't intersect with swap > > entry format stored in pte. > > So the implication is that if another architecture wants to support > this (and, realistically, wants to support CRIU), that architecture > must find a spare pte bit to implement _PTE_SWP_SOFT_DIRTY. Yes?
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