Re: [RFC v6][PATCH 0/9] Kernel based checkpoint/restart

[Dave Hansen]

On Mon, 2008-10-13 at 10:13 +0200, Cedric Le Goater wrote:
> hmm, that's rather complex, because we have to take into account the 
> kernel stack, no ? This is what Andrey was trying to solve in his patchset 
> back in September :
> 
>         http://lkml.org/lkml/2008/9/3/96
> 
> the restart phase simulates a clone and switch_to to (not) restore the kernel 
> stack. right ? 

Do we ever have to worry about the kernel stack if we simply say that
tasks have to be *in* userspace when we checkpoint them.  If a task is
in an uninterruptable wait state, I'm not sure it's safe to checkpoint
it anyway.

-- Dave

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