Messages in this thread | | | Date | Tue, 10 Jul 2007 11:56:41 +1000 | From | Paul Mackerras <> | Subject | Re: [linux-pm] Re: hibernation/snapshot design [was Re: [PATCH] Remove process freezer from suspend to RAM pathway] |
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Nigel Cunningham writes:
> (Finally catching up on emails since Saturday!)
Yes, I know what you mean; I was occupied with other work stuff on Friday and not well on Saturday, and by that stage there was a backlog of about 500 emails for me to wade through... :/
> The freezer is also essential for doing a full image of memory - you > have to be able to guarantee that some of the image won't change in > order to be able to write it out before the atomic copy. Of course the > freezer alone isn't enough, but it solves 95% of the issue.
Sure. As I pointed out in another email, it's unrealistic to expect the freezer to be able to stop everything in a state where any arbitrary mutex is free. But as long as you don't need to do anything that depends on getting a mutex while the system is frozen, there should be no problem.
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