495 494 0:62 / /zdtm/static/shared_slave_mount_children.test/share rw,relatime shared:235 - tmpfs share rw
496 494 0:62 / /zdtm/static/shared_slave_mount_children.test/slave1 rw,relatime shared:236 master:235 - tmpfs share rw
497 494 0:62 / /zdtm/static/shared_slave_mount_children.test/slave2 rw,relatime shared:236 master:235 - tmpfs share rw
498 496 0:63 / /zdtm/static/shared_slave_mount_children.test/slave1/child rw,relatime shared:237 - tmpfs child rw
499 497 0:63 / /zdtm/static/shared_slave_mount_children.test/slave2/child rw,relatime shared:237 - tmpfs child rw

Before the fix we had:

(00.167574)      1: Error (criu/mount.c:1769): mnt: A few mount points can't be mounted
(00.167577)      1: Error (criu/mount.c:1773): mnt: 498:496 / /tmp/.criu.mntns.o2Op5j/9-0000000000/zdtm/static/shared_slave_mount_children.test/slave1/child child
(00.167580)      1: Error (criu/mount.c:1773): mnt: 497:494 / /tmp/.criu.mntns.o2Op5j/9-0000000000/zdtm/static/shared_slave_mount_children.test/slave2 share
Signed-off-by: Pavel Tikhomirov <ptikhomirov@virtuozzo.com>