[CRIU] Re: [PATCH cr] cr-restore: block SIGCHLD for restoring namespaces

[Pavel Emelyanov]

On 09/20/2012 03:22 PM, Andrey Vagin wrote:
> Restore of namespaces requires executions of external tools
> (ip, tar, etc). We want to know return codes, so we should
> block a default sigchld handler. Before we did that for each
> command, I suggest to block SIGCHLD, then restore namespace and
> unblock SIGCHLD.
> 
> The default sigchld handler is used for catching target processes,
> but all this processes (except a current one ) are started after
> restoring namespaces.
> 
> Currently we forgot to block SIGCHLD before executing "ip",
> and this bug was caught.
> 
> Reported-by: Stanislav Kinsbursky <skinsbursky at parallels.com>
> Signed-off-by: Andrey Vagin <avagin at openvz.org>

Applied