From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Serge E. Hallyn" Subject: Re: [PATCH 5/5] Deny external checkpoint unless task is frozen Date: Fri, 13 Mar 2009 08:54:50 -0500 Message-ID: <20090313135450.GD32304@us.ibm.com> References: <20090312042416.GC7733@us.ibm.com> <20090312042614.GE8703@us.ibm.com> <20090312173707.GC17253@us.ibm.com> <49B9D0BD.40701@cs.columbia.edu> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <49B9D0BD.40701-eQaUEPhvms7ENvBUuze7eA@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: containers-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: containers-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: Oren Laadan Cc: Containers , Sukadev Bhattiprolu , "David C. Hansen" List-Id: containers.vger.kernel.org Quoting Oren Laadan (orenl-eQaUEPhvms7ENvBUuze7eA@public.gmane.org): > > > Serge E. Hallyn wrote: > > Quoting Sukadev Bhattiprolu (sukadev-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org): > >> From: Sukadev Bhattiprolu > >> 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 > > > > 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