[PATCH 5/5] Deny external checkpoint unless task is frozen

Serge E. Hallyn serue at us.ibm.com
Fri Mar 13 06:54:50 PDT 2009


Quoting Oren Laadan (orenl at cs.columbia.edu):
> 
> 
> Serge E. Hallyn wrote:
> > Quoting Sukadev Bhattiprolu (sukadev at linux.vnet.ibm.com):
> >> From: Sukadev Bhattiprolu <sukadev at linux.vnet.ibm.com>
> >> Subject: [PATCH 5/5] Deny external checkpoint unless task is frozen
> >>
> >> Remove a 'FIXME' and ensure that the tasks we are checkpointing are
> >> frozen unless its a self-checkpoint.
> >>
> >> Signed-off-by: Sukadev Bhattiprolu <sukadev at linux.vnet.ibm.com>
> > 
> > I remain not-a-fan of self-checkpoint, and think it needlessly
> > complicates locking, but it isn't for this patch to change that :)
> 
> lol ... here's is an interesting use case for self checkpoint: "ASSURE:
> Automatic Software Self-healing Using REscue points" (ASPLOS 2009).
> 
> Oren.

Right, but we can always do self-checkpoint by sending a signal to
an external daemon which freezes us and then does the checkpoint, no?

Ok I haven't read the paper, so if the answer is "no that won't work,
dumbass" then i'll go and read it :)

thanks,
-serge


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