Commits
Alexey Kuznetsov authored and Pavel Emelianov committed 1ad0c403d0c
[CPT] thread groups with exited leader did not migrate The bug is simple and stupid, it is very strange nobody saw this. When thread group leader exits, its mm/files/fs/namespace are released but zombie process remain frozen until all the threads exit. Restore was not able to restore such configuration. Solution is simple: when chackpointing save not real (NULL) mm/files/fs/namespace, but mm/files/fs/namespace of this thread group.