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Re:Nasty Lockup Issue Still Being Investigated for Linux 3.18 by ams6110 on Sunday November 30, 2014 @10:01PM (#8679295)
DragonFly BSD does this. They call it process checkpointing.

Processes under DragonFly may be "checkpointed" or suspended to disk at any time. They may later be resumed on the originating system, or another system by "thawing" them.

http://www.dragonflybsd.org/features/#index8h2

Re:Nasty Lockup Issue Still Being Investigated for Linux 3.18 by hiphopyo on Sunday November 30, 2014 @10:54PM (#8679426)
OpenBSD and FreeBSD call it suspend/resume I think:

http://openbsd.org/papers/zzz.pdf

http://wiki.freebsd.org/SuspendResume

Re:Nasty Lockup Issue Still Being Investigated for Linux 3.18 by kasabali on Monday December 01, 2014 @05:00PM (#8684168)
Those links are talking about suspend/resume of the computer, which is a totally different thing.