Causes sys_checkpoint() to fail as with any uncheckpointable filesystem object.
Any task with an open FUSE filesystem object (file, dir, etc) will cause sys_checkpoint() to return failure. Using the glibc syscall wrapper it would return -1 and set errno to EINVAL. Some portions of a checkpoint image may exist but it's terminated with an "error" description so that any attempt to use it will cause restart to fail.
Issues, Solutions, Impacts
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