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SubjectRe: [linux-pm] Proposal for a new algorithm for reading & writing a hibernation image.
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...

--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html


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