Re: intensive IO on usb-storage device causing system lock

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The situation is unchanged, but I noticed there is a continous process of creating workers. They might die at some point, but I noticed them now.

Sorry for the verbosity. Here's the last trace:
http://cxg.de/_dedb43.htm

And process list:
  PID TTY      STAT   TIME COMMAND
    1 ?        Ss     0:01 /sbin/init auto
    2 ?        S      0:00 [kthreadd]
    3 ?        S      0:16 [ksoftirqd/0]
    5 ?        S<     0:00 [kworker/0:0H]
    7 ?        S<     0:00 [khelper]
    8 ?        S      0:00 [kdevtmpfs]
    9 ?        S<     0:00 [perf]
  107 ?        S<     0:00 [writeback]
  110 ?        S<     0:00 [crypto]
  111 ?        S<     0:00 [bioset]
  113 ?        S<     0:00 [kblockd]
  160 ?        S<     0:00 [ata_sff]
  162 ?        S      0:26 [kswapd0]
  163 ?        S      0:00 [fsnotify_mark]
  167 ?        S<     0:00 [kthrotld]
  420 ?        S      0:10 [kworker/u2:2]
  421 ?        S      0:00 [scsi_eh_0]
  438 ?        S<     0:00 [scsi_tmf_0]
  441 ?        S      0:00 [scsi_eh_1]
  442 ?        S<     0:00 [scsi_tmf_1]
  468 ?        S<     0:00 [deferwq]
  482 ?        S<     0:00 [ext4-rsv-conver]
  499 ?        S<     0:00 [ipv6_addrconf]
  536 ?        Ss     0:06 /usr/lib/systemd/systemd-journald
  913 ?        Ss     0:00 /usr/lib/systemd/systemd-udevd
  933 ?        S<     0:00 [kpsmoused]
  961 ?        Ss     0:01 /usr/lib/systemd/systemd-logind
  967 ?        Ss     0:00 /usr/bin/dbus-daemon --system --address=systemd: --nofork --nopidfile --systemd-activation
  970 ?        S<     0:00 [acpi_thermal_pm]
 1016 ?        S<     0:00 [cfg80211]
 1036 ?        S<     0:00 [hd-audio0]
 1037 ?        Ss     0:00 /usr/bin/sshd -D
 1074 ?        S<     0:01 [kworker/u3:0]
 1075 ?        S<     0:00 [hci0]
 1076 ?        S<     0:00 [hci0]
 1077 ?        S<     0:01 [kworker/u3:1]
 1116 ?        S      0:00 [scsi_eh_2]
 1121 ?        S<     0:00 [scsi_tmf_2]
 1122 ?        S      0:00 [usb-storage]
 1171 ?        S<     0:00 [kworker/0:1H]
 1220 ?        Ss     0:00 /usr/lib/bluetooth/bluetoothd
 1235 ?        Rsl    1:25 brltty -b al -d bluetooth:00:A0:96:31:E5:1E
 1244 ?        S<     0:00 [krfcommd]
 1276 ?        S      0:00 [scsi_eh_3]
 1278 ?        S<     0:00 [scsi_tmf_3]
 1279 ?        S      0:20 [usb-storage]
 1300 ?        Ss     0:00 login -- mrkiko
 1302 ?        Ss     0:00 login -- mrkiko
 1304 ?        Ss     0:00 login -- mrkiko
 1312 ?        Ss     0:00 login -- mrkiko
 1314 ?        Ss     0:00 login -- mrkiko
 1316 ?        Ss     0:00 login -- mrkiko
 1318 ?        Ss     0:00 login -- mrkiko
 1319 ?        Ss     0:00 login -- mrkiko
 1326 ?        Ss     0:00 login -- mrkiko
 1332 ?        Ss     0:00 login -- mrkiko
 1334 ?        Ss     0:00 login -- mrkiko
 1337 tty2     Ss     0:00 -bash
 1351 ?        Ssl    0:00 /usr/lib/polkit-1/polkitd --no-debug
 1407 ?        Ss     0:00 /usr/bin/dhcpcd -q -w enp3s0
 1410 tty3     Ss+    0:00 -bash
 1417 tty4     Ss+    0:00 -bash
 1424 tty5     Ss+    0:00 -bash
 1431 tty6     Ss+    0:00 -bash
 1438 tty7     Ss+    0:00 -bash
 1445 tty8     Ss+    0:00 -bash
 1452 tty9     Ss+    0:00 -bash
 1459 tty10    Ss+    0:00 -bash
 1465 tty11    Ss+    0:00 -bash
 1473 tty12    Ss     0:00 -bash
 1494 tty12    S+     0:07 finch
 1536 ?        S<     0:00 [ext4-rsv-conver]
 1804 ?        Dsl    2:12 mpd .mpdconf
 3112 ?        S<     0:00 [ext4-rsv-conver]
 3161 ?        S      0:00 [kworker/u2:1]
 3166 tty2     S      0:00 sudo su root
 3167 tty2     S      0:00 su root
 3168 tty2     S      0:00 bash
 3178 tty2     D+     0:00 dmesg
 3183 ?        Ss     0:00 login -- mrkiko
 3205 ?        S      0:00 [kworker/0:0]
 3240 tty1     Ss     0:00 -bash
 3535 ?        S      0:00 [kworker/0:1]
 3545 ?        S      0:00 [kworker/0:2]
 3561 tty1     S+     0:00 alpine -i
 3565 tty1     S+     0:00 nano /tmp/pico.05873
 3566 tty1     R+     0:00 ps ax

Where kworkers with PID 3535 and 3545 looked interesting to me.
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