I've lived through several checkpointing implementations. You've got the easy part. Applications must participate or such a facility has very limited usefulness. Delivering a signal is only part of the problem; there tend to be issues synchronizing user-mode checkpoint of application state with the kernel's desired to stop the process and squirrel away state.
There's lots of stuff published about this; check the literature. Sam _______________________________________________ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[EMAIL PROTECTED]"