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

[Pavel Machek]

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
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/