Messages in this thread | | | Date | Wed, 15 Oct 2008 17:15:57 +0200 | From | Cedric Le Goater <> | Subject | Re: [RFC v6][PATCH 0/9] Kernel based checkpoint/restart |
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Dave Hansen wrote: > 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.
at a syscall boundary for example. that would make our life easier definitely.
C.
> If a task is > in an uninterruptable wait state, I'm not sure it's safe to checkpoint > it anyway.
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