ioctl$BTRFS_IOC_BALANCE_PROGRESS(0xffffffffffffffff, 0x84009422, 0x0)
perf_event_open(0x0, 0x0, 0x0, 0xffffffffffffffff, 0x0)
r0 = openat$loop_ctrl(0xffffffffffffff9c, &(0x7f0000000180), 0x0, 0x0)
ioctl$LOOP_CTL_GET_FREE(r0, 0x4c82)