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Robust lists may be disabled, for example if the "futex_cmpxchg_enabled" variable in the kernel is unset. Detect that case by checking that both "get_robust_list" and "set_robust_list" syscalls return ENOSYS and do not make criu dump fail in that case, but simply assume an empty list, which is consistent with the syscalls not being available. Tested: Successfully ran the zdtm test suite on a kernel where the "get_robust_list" and "set_robust_list" syscalls are disabled. Signed-off-by: Filipe Brandenburger <filbranden@google.com> Acked-by: Cyrill Gorcunov <gorcunov@openvz.org> Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
criu ==== An utility to checkpoint/restore tasks. Using this tool, you can freeze a running application (or part of it) and checkpoint it to a hard drive as a collection of files. You can then use the files to restore and run the application from the point it was frozen at. The distinctive feature of the CRIU project is that it is mainly implemented in user space. The project home is at http://criu.org Pages worth starting with are * Kernel configuration, compilation, etc: http://criu.org/Installation * A simple example of usage: http://criu.org/Simple_loop * More sophisticated example with graphical app: http://criu.org/VNC