Re: A kexec approach to hibernation

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Hi.

On Mon, 2007-06-04 at 18:09 -0400, Jeremy Maitin-Shepard wrote:
> I was hoping that everyone would like the idea so much that they would
> rush to 
> implement it, so that I wouldn't have to try.  (I haven't written much kernel 
> code before, and I have a number of other time-requiring projects to work on.) 
> It looks like that is not too likely to happen though ;).

I spent some time, last I think, seriously considering this approach.
The more I thought about the details, the more I realised that it wasn't
a viable approach. As I said before, it does indeed sound like a dream
at first, but once you get into the details, it becomes more and more of
a nightmare.

> Maybe I'll try implementing it though, and find that it isn't very much work.

Perhaps that would be a good idea. Then you'll get to see those issues
too.

[...]

> To some extent, (see some of the explanations I gave in the other e-mail I
> sent a few minutes ago in reply to Nigel) I think the kexec appraoch can be
> viewed as a cleaner variant of userspace hibernate.

I'm not going to bother saying more in response to that at the moment.
It seems clear to me that the three of us who've actually worked on
hibernation and thought about the issues actually know nothing, and
everyone who hasn't worked on it is far more expert than us.

I'm not saying that I think it's utterly impossible to use kexec for
hibernation. I am saying that I think such an implementation would be
even more of a headache than the existing issues.

Regards,

Nigel

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