Hi. On 30/05/10 15:25, Pavel Machek wrote: > Hi! > >> 2. Prior to writing any of the image, also set up new 4k page tables >> such that an attempt to make a change to any of the pages we're about to >> write to disk will result in a page fault, giving us an opportunity to >> flag the page as needing an atomic copy later. Once this is done, write >> protection for the page can be disabled and the write that caused the >> fault allowed to proceed. > > Tricky. > > page faulting code touches memory, too... Yeah. I realise we'd need to make the pages that are used to record the faults be unprotected themselves. I'm imagining a bitmap for that. Do you see any reason that it could be inherently impossible? That's what I really want to know before (potentially) wasting time trying it. Regards, Nigel _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
