In case of rst_sibling, we are tracing the root task, but we are tracing
only the leader thread, so we must attach to other threads to stop them.
Reported-by: Ross Boucher <rboucher@gmail.com>
Cc: Ross Boucher <rboucher@gmail.com>
Signed-off-by: Andrey Vagin <avagin@openvz.org>
Tested-by: Ross Boucher <rboucher@gmail.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>