Stefan, while recent kernels seem happier than previous kernels (I think -14 era was terrible), I don't think this problem is fixed yet:
sarnold@millbarge:/tmp$ uname -a Linux millbarge 5.4.0-21-generic #25-Ubuntu SMP Sat Mar 28 13:10:28 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux sarnold@millbarge:/tmp$ uptime 17:18:02 up 14:59, 8 users, load average: 0.36, 0.27, 0.16 sarnold@millbarge:/tmp$ time journalctl > foo real 0m47.135s user 0m36.886s sys 0m10.180s sarnold@millbarge:/tmp$ ls -lh /tmp/foo -rw-rw-r-- 1 sarnold sarnold 841M Apr 3 17:15 /tmp/foo sarnold@millbarge:/tmp$ wc -l /tmp/foo 4045530 /tmp/foo During that journalctl run, my mouse could not move for twenty seconds. I left an iovisor tool running to log high-latency __alloc_pages_nodemask() calls (identified by Sultan as a likely cause): # funcslower-bpfcc __alloc_pages_nodemask Tracing function calls slower than 1 ms... Ctrl+C to quit. COMM PID LAT(ms) RVAL FUNC dp_sync_taskq 716 7.72 fffff2d109115040 __alloc_pages_nodemask systemd-udevd 44671 1.59 fffff2d10575b800 __alloc_pages_nodemask git 46218 4.27 fffff2d10500edc0 __alloc_pages_nodemask z_wr_iss 683 4.90 fffff2d101b4cf40 __alloc_pages_nodemask systemd-udevd 51359 4.27 fffff2d10ec12800 __alloc_pages_nodemask systemd-udevd 56585 2.48 fffff2d10d3b0500 __alloc_pages_nodemask systemd-udevd 56577 2.55 fffff2d106f73380 __alloc_pages_nodemask systemd-udevd 72552 2.09 fffff2d105249680 __alloc_pages_nodemask systemd-udevd 76964 1.53 fffff2d1017fd440 __alloc_pages_nodemask systemd-udevd 80900 3.94 fffff2d102675200 __alloc_pages_nodemask systemd-udevd 88669 2.09 fffff2d1015fb5c0 __alloc_pages_nodemask kthreadd 2 4.41 fffff2d10d6f96c0 __alloc_pages_nodemask kthreadd 2 4.65 fffff2d10d38c3c0 __alloc_pages_nodemask kthreadd 2 3.97 fffff2d10d3cc780 __alloc_pages_nodemask updatedb.mloca 106194 2.44 fffff2d10e1c2680 __alloc_pages_nodemask kthreadd 2 1.20 fffff2d10d36ff40 __alloc_pages_nodemask kthreadd 2 4.13 fffff2d10d495940 __alloc_pages_nodemask kthreadd 2 6.34 fffff2d10d317180 __alloc_pages_nodemask kthreadd 2 4.76 fffff2d110e85000 __alloc_pages_nodemask systemd-udevd 113822 1.51 fffff2d10f5c8e00 __alloc_pages_nodemask systemd-udevd 113820 1.91 fffff2d10e611800 __alloc_pages_nodemask systemd-udevd 122017 3.13 fffff2d10e539700 __alloc_pages_nodemask systemd-udevd 141102 2.43 fffff2d104487200 __alloc_pages_nodemask systemd-udevd 144565 4.82 fffff2d106b84040 __alloc_pages_nodemask systemd-udevd 1156 1.28 fffff2d102325c00 __alloc_pages_nodemask systemd-udevd 152486 3.07 fffff2d101516500 __alloc_pages_nodemask systemd-udevd 152485 4.94 fffff2d1015cbbc0 __alloc_pages_nodemask systemd-udevd 172807 1.33 fffff2d1015f4700 __alloc_pages_nodemask systemd-udevd 185503 4.46 fffff2d10d321240 __alloc_pages_nodemask systemd-udevd 189244 5.12 fffff2d10e7f0b00 __alloc_pages_nodemask systemd-udevd 205973 5.36 fffff2d10d4171c0 __alloc_pages_nodemask systemd-udevd 210133 5.19 fffff2d10ffac340 __alloc_pages_nodemask systemd-udevd 209621 2.95 fffff2d10d377fc0 __alloc_pages_nodemask systemd-udevd 218768 2.24 fffff2d10526e500 __alloc_pages_nodemask systemd-udevd 234261 1.42 fffff2d101814680 __alloc_pages_nodemask systemd-udevd 235468 3.82 fffff2d10d2afa40 __alloc_pages_nodemask systemd-udevd 236826 4.94 fffff2d10d0f8440 __alloc_pages_nodemask systemd-udevd 247115 1.13 fffff2d1023ee180 __alloc_pages_nodemask systemd-udevd 247573 1.46 fffff2d1015a4040 __alloc_pages_nodemask systemd-udevd 271288 5.38 fffff2d10d1b3800 __alloc_pages_nodemask dav1d-tile 283460 2.05 fffff2d10cdb0b80 __alloc_pages_nodemask dav1d-tile 283460 2.80 fffff2d10cdb8840 __alloc_pages_nodemask dav1d-tile 283460 2.83 fffff2d10cdb9200 __alloc_pages_nodemask RemVidParent 283460 2.82 fffff2d10cdba200 __alloc_pages_nodemask dav1d-tile 283460 4.11 fffff2d10cdbcf00 __alloc_pages_nodemask journalctl 286270 1.71 fffff2d10e2668c0 __alloc_pages_nodemask journalctl 286270 1.09 fffff2d10ccfac00 __alloc_pages_nodemask journalctl 286270 1.11 fffff2d10cce3200 __alloc_pages_nodemask journalctl 286270 2.96 fffff2d10cce7380 __alloc_pages_nodemask x-terminal-emu 24851 1.14 fffff2d1086a2a00 __alloc_pages_nodemask journalctl 286270 1.44 fffff2d10ccc41c0 __alloc_pages_nodemask kthreadd 2 1.25 fffff2d110c71000 __alloc_pages_nodemask journalctl 286270 1.05 fffff2d10ccb1200 __alloc_pages_nodemask journalctl 286270 1.65 fffff2d10ccbd700 __alloc_pages_nodemask journalctl 286270 3.08 fffff2d102229000 __alloc_pages_nodemask journalctl 286270 1.88 fffff2d10cbfd0c0 __alloc_pages_nodemask journalctl 286270 1.54 fffff2d109088100 __alloc_pages_nodemask journalctl 286270 1.04 fffff2d105db1800 __alloc_pages_nodemask kthreadd 2 2.57 fffff2d1092603c0 __alloc_pages_nodemask journalctl 286270 3.59 fffff2d109358780 __alloc_pages_nodemask journalctl 286270 1.21 fffff2d10ed83980 __alloc_pages_nodemask journalctl 286270 3.17 fffff2d10cb6be40 __alloc_pages_nodemask journalctl 286270 1.65 fffff2d10cb6de00 __alloc_pages_nodemask journalctl 286270 1.00 fffff2d10cb6fdc0 __alloc_pages_nodemask journalctl 286270 3.97 fffff2d10cb46700 __alloc_pages_nodemask journalctl 286270 1.08 fffff2d10fef7700 __alloc_pages_nodemask journalctl 286270 1.11 fffff2d1106ab840 __alloc_pages_nodemask journalctl 286270 1.16 fffff2d10cb204c0 __alloc_pages_nodemask journalctl 286270 1.22 fffff2d110d71640 __alloc_pages_nodemask journalctl 286270 1.10 fffff2d110e4afc0 __alloc_pages_nodemask journalctl 286270 1.03 fffff2d10d912580 __alloc_pages_nodemask journalctl 286270 1.06 fffff2d109de5a00 __alloc_pages_nodemask journalctl 286270 1.05 fffff2d10cad6f40 __alloc_pages_nodemask journalctl 286270 1.52 fffff2d10ca206c0 __alloc_pages_nodemask journalctl 286270 1.17 fffff2d10927f300 __alloc_pages_nodemask journalctl 286270 1.18 fffff2d10ca1a400 __alloc_pages_nodemask kthreadd 2 1.77 fffff2d11008d400 __alloc_pages_nodemask journalctl 286270 2.98 fffff2d108f41e40 __alloc_pages_nodemask journalctl 286270 1.09 fffff2d10c9fe440 __alloc_pages_nodemask journalctl 286270 1.53 fffff2d1090532c0 __alloc_pages_nodemask journalctl 286270 1.45 fffff2d10c9d4e40 __alloc_pages_nodemask kthreadd 2 1.72 fffff2d10fc46040 __alloc_pages_nodemask z_wr_iss_h 684 1.85 fffff2d10a384cc0 __alloc_pages_nodemask journalctl 286270 1.29 fffff2d10c9c0480 __alloc_pages_nodemask kthreadd 2 1.35 fffff2d109ffd8c0 __alloc_pages_nodemask systemd-udevd 288492 2.55 fffff2d10e30a5c0 __alloc_pages_nodemask This feels better but not yet fixed. Thanks -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1861359 Title: swap storms kills interactive use To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1861359/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
