Re: [PATCH] Deny external checkpoint unless frozen

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On Mon, 2009-02-23 at 17:04 -0600, Serge E. Hallyn wrote:
> Quoting Sukadev Bhattiprolu (sukadev@xxxxxxxxxxxxxxxxxx):
> > 
> > From: Sukadev Bhattiprolu <sukadev@xxxxxxxxxxxxxxxxxx>
> > Date: Sat, 21 Feb 2009 11:17:07 -0800
> > Subject: [PATCH] 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@xxxxxxxxxxxxxxxxxx>
> 
> Agreed.  I personally would like to just get rid of support
> for t==current, but don't expect to get anywhere with that
> argument :)

Along the lines of what Ingo has been asking for, do we need to expose
this logic in some way?  Do we need a /proc/$$/checkpointable file which
says, "I'm not checkpointable because I'm not frozen"?

Or, is this just a core part of the API: you have to freeze before
checkpointing?  As such, we'll never move to a place where we're not
frozen when checkpointing, so we might as well not even track or expose
it.  

-- Dave

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