BTW, after you apply this and turn on the config option, you do get a
ton of warnings at runtime.
qemu:~# cat /proc/*/fdinfo/* | grep check | sort | uniq -c | sort -n
1 checkpointable: 0(proc does not support checkpoint)
6 checkpointable: 0(pipefs does not support checkpoint)
8 checkpointable: 0(devpts does not support checkpoint)
9 checkpointable: 0(sockfs does not support checkpoint)
17 checkpointable: 0(special file)
17 checkpointable: 1
The special files are /dev/{null,console,xconsole}. The next step
should probably be to address simple special files like /dev/null. I
think I'll do that with a new f_op. Any thoughts?
-- Dave
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