[CRIU] [PATCH v2] dump: do not fail dump when robust_lists are disabled

[Cyrill Gorcunov]

On Wed, Jun 25, 2014 at 08:35:31AM -0700, Filipe Brandenburger wrote:
> 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 at google.com>
Acked-by: Cyrill Gorcunov <gorcunov at openvz.org>

Thanks!