Why is find running here?

Why is find running here?

I noticed very high IOwait, even copying/pasting from NetBeans to Firefox was taking several minutes and hanging for a long while. In powertop, I noticed:
            Usage       Events/s    Category       Description
          0.0 pkts/s                Device         Network interface: eth1 (wl)
        100.0%                      Device         Audio codec hwC0D0: Realtek
         75.7%                      Device         Display backlight
        100.0%                      Device         USB device: usb-device-05ac-8205
        308.1 µs/s      16.9        Process        [rcu_sched]
        317.3 µs/s       1.7        Process        [ksoftirqd/0]
          2.6 ms/s       4.6        Process        compiz
          1.8 ms/s      15.0        Process        gnome-terminal
          8.0 ms/s      0.00        kWork          acpi_os_execute_deferred
          7.3 ms/s      0.00        Timer          wl_timer
          6.3 ms/s      34.6        Process        /usr/bin/find / -ignore_readdir_race ( -fstype NFS -o -fstype nfs -o -fstype nfs4 -o -fstype afs -o -fstype binfmt_misc -o -fst
          2.8 ms/s      16.1        Process        /usr/bin/X :0 -core -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch -background none
          2.4 ms/s      0.15        Process        [kswapd0]
          1.3 ms/s      0.00        Process        /usr/sbin/preload -s /var/lib/preload/preload.state
          1.1 ms/s      0.00        Process        /usr/sbin/macfanctld
          1.0 ms/s      14.3        Interrupt      [45] i915
          0.9 ms/s       7.0        Timer          tick_sched_timer
          0.7 ms/s      0.00        Interrupt      [21] uhci_hcd:usb7
          0.7 ms/s      10.2        kWork          od_dbs_timer
        659.0 µs/s      0.05        Process        indicator-multiload
        649.5 µs/s       0.4        Interrupt      [9] RCU(softirq)
        643.8 µs/s      0.00        Process        /usr/lib/x86_64-linux-gnu/hud/hud-service
        641.7 µs/s      33.5        Interrupt      [4] block(softirq)
        629.7 µs/s       0.7        Process        /usr/lib/unity/unity-panel-service
        585.4 µs/s      0.05        Process        powertop
        498.7 µs/s      0.00        Interrupt      [43] SATA controller
        371.8 µs/s      0.00        Timer          delayed_work_timer_fn
        301.4 µs/s      0.15        kWork          atp_reinit
        299.4 µs/s      0.05        kWork          disk_events_workfn
        185.3 µs/s      13.5        Interrupt      [21] ata_piix
        171.3 µs/s       2.6        Timer          hrtimer_wakeup
        162.5 µs/s      0.05        Process        [ksoftirqd/1]
        152.6 µs/s      0.10        Process        /usr/bin/python3 /usr/bin/indicator-cpufreq
        148.5 µs/s      0.00        Interrupt      [0] timer/0
        146.2 µs/s       2.4        Process        /usr/sbin/mysqld
        134.8 µs/s      0.10        Process        /usr/lib/x86_64-linux-gnu/indicator-application-service
        121.7 µs/s      0.00        Interrupt      [1] timer(softirq)
        115.9 µs/s      0.00        Timer          timeout_func
        109.8 µs/s      0.00        Timer          rh_timer_func
        109.7 µs/s      0.00        Process        /usr/bin/sort -