[Bug 275063] kernel using 100% CPU in arc_prune

From: <bugzilla-noreply_at_freebsd.org>
Date: Mon, 13 Nov 2023 21:18:26 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=275063

--- Comment #2 from Martin Birgmeier <d8zNeCFG@aon.at> ---
Thanks for the first answer.

After a reboot, the situation is as follows:

last pid:   977;  load averages:  0.25,  0.12,  0.04                           
up 0+00:03:11  22:17:10
368 threads:   6 running, 342 sleeping, 20 waiting
CPU:  0.9% user,  0.0% nice,  3.6% system,  0.5% interrupt, 95.0% idle
Mem: 241M Active, 13M Inact, 962M Wired, 95M Buf, 14G Free
ARC: 404M Total, 63M MFU, 224M MRU, 16K Anon, 5968K Header, 104M Other
     51M Compressed, 291M Uncompressed, 5.70:1 Ratio
Swap: 20G Total, 20G Free

  PID USERNAME    PRI NICE   SIZE    RES STATE    C   TIME    WCPU COMMAND
   10 root        187 ki31     0B    64K RUN      2   3:06  95.47% idle{idle:
cpu2}
   10 root        187 ki31     0B    64K CPU1     1   3:04  95.24% idle{idle:
cpu1}
   10 root        187 ki31     0B    64K CPU3     3   3:07  94.91% idle{idle:
cpu3}
   10 root        187 ki31     0B    64K RUN      0   3:06  92.78% idle{idle:
cpu0}
  956 root         24    0    51M    11M zio->i   2   0:01   7.21% rsync
  957 root         21    0    23M  8544K select   1   0:01   2.76% rsync
    0 root        -12    -     0B  1376K -        0   0:00   1.25%
kernel{z_wr_iss_0}
    4 root        -16    -     0B    48K -        3   0:01   1.23% cam{doneq0}
    0 root        -12    -     0B  1376K -        2   0:00   1.18%
kernel{z_wr_iss_1}
    0 root        -12    -     0B  1376K -        3   0:01   1.14%
kernel{z_wr_iss_2}
   11 root        -64    -     0B   256K WAIT     1   0:01   1.10% intr{irq29:
ahci1}
    0 root        -16    -     0B  1376K -        2   0:00   1.04%
kernel{z_wr_int_0}
    0 root        -16    -     0B  1376K -        3   0:00   0.87%
kernel{z_wr_int_2}
    0 root        -16    -     0B  1376K -        3   0:00   0.86%
kernel{z_wr_int_1}
    0 root        -16    -     0B  1376K RUN      2   0:01   0.79%
kernel{z_rd_int_0}
    0 root        -16    -     0B  1376K -        3   0:01   0.63%
kernel{z_rd_int_2}
  958 root         20    0    59M    10M select   1   0:00   0.41% rsync

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