[Bug 247829] Constant load of 1 on a recent 12.1-STABLE with 3 ZFS pools (high rates of zfskern{mmp_thread_enter})

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=247829

Jamie Landeg-Jones <jamie at catflap.org> changed:

           What    |Removed                     |Added
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                 CC|                            |jamie at catflap.org

--- Comment #1 from Jamie Landeg-Jones <jamie at catflap.org> ---
Yes, I just updated 12.1-stable from a previous 13th May build, and I'm now
seeing similar.

I don't get quite up to 1.00 but I only have ZFS on an /archive partition that
is literally idle.

I have one zfskern{mmp_thread_enter} continuously using 3% of one CPU core of
an i7-7567-U 3.5GHz

PID   JID USERNAME    PRI NICE   SIZE    RES SWAP STATE    C   TIME    WCPU
COMMAND
   11     0 root        155 ki31     0B    64K   0B CPU3     3  38.3H  99.29%
[idle{idle: cpu3}]
   11     0 root        155 ki31     0B    64K   0B CPU1     1  38.1H  99.00%
[idle{idle: cpu1}]
   11     0 root        155 ki31     0B    64K   0B CPU0     0  38.1H  98.53%
[idle{idle: cpu0}]
   11     0 root        155 ki31     0B    64K   0B RUN      2  38.0H  98.34%
[idle{idle: cpu2}]                                                             
                                     46     0 root         -8    -     0B  
656K   0B RUN      0  66:45   2.90% [zfskern{mmp_thread_enter}]

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