["Followup-To:" header set to comp.os.linux.misc.] useful_infos@yahoo.com staggered into the Black Sun and said: > Suppose I've started a program that will take hours or even days to > complete, and the program lacks any ability to stop and later resume. The program needs to be fixed if it runs for multiple hours and doesn't save its state periodically or have any way to resume without losing everything. File a bug report. > Is there any way to hiberate a process? By this I mean store its RAM > to disk, freeze access to any files that it was accessing, and be able > to resume [it] later? I think the thing you're looking for has been implemented at least partially. They called it "checkpointing" and said they were using it to migrate processes among nodes of a cluster. IIRC, it required kernel patches and that all files the process was accessing be on an NFS server. So it wasn't a general solution, but you might want to Google that keyword and see if it's been improved. If your process isn't user-interactive, kill -STOP will stop it eating CPU, but the process will still be using RAM until the VM shuffles it off to swap. Using -STOP on user-interactive things like X clients can cause them to react weirdly, so be careful. -CONT should start it up again. HTH anyway, -- "Dreams? Best leave dreams to those that can afford them." --Aunt Cordelia, _Wizard and Glass_, Stephen King Matt G|There is no Darkness in Eternity/But only Light too dim for us to see

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