r0 = openat(0xffffffffffffff9c, &(0x7f0000000440)='./cgroup.cpu/cpuset.cpus\x00', 0x0, 0x0)
r1 = socket$unix(0x1, 0x2, 0x0)
mount$9p_fd(0x0, &(0x7f0000000640)='./cgroup.cpu/cpuset.cpus\x00', &(0x7f0000000680), 0x0, &(0x7f0000000900)={'trans=fd,', {'rfdno', 0x3d, r0}, 0x2c, {'wfdno', 0x3d, r1}})