Re: ZFS operations hanging, but no visible errors?

From: Chris Ross <cross+freebsd_at_distal.com>
Date: Fri, 05 Nov 2021 17:12:39 UTC 

> On Nov 5, 2021, at 13:03, Rich <rincebrain@gmail.com> wrote:
> 
> That would, indeed, print things as they happen, so if nothing's happening, ...
> 
> I believe "sysctl kstat.zfs.misc.dbgmsg" would give you all currently
> logged ones.

Okay.  Despite everything I had running being stuck I was able to log into the console, and coincidentally or not, things have now recovered.  Well, the old commands/sessions didn’t, but I can log in again.  I can’t get to the tmux session it seems, but.

I’m able to run that sysctl, which has a lot of data.  The last records all about two hours ago are:

1636125429   metaslab.c:2538:metaslab_unload(): metaslab_unload: txg 1033689, spa tank, vdev_id 1, ms_id 854, weight 780000000000001, selected txg 1033574 (601067 ms ago), alloc_txg 1033313, loaded 5902891 ms ago, max_size 2147475456
1636125429   metaslab.c:2538:metaslab_unload(): metaslab_unload: txg 1033689, spa tank, vdev_id 2, ms_id 88, weight 880000000000001, selected txg 1033574 (601067 ms ago), alloc_txg 1020497, loaded 864138 ms ago, max_size 17179869184
1636125429   metaslab.c:2538:metaslab_unload(): metaslab_unload: txg 1033689, spa tank, vdev_id 1, ms_id 859, weight 780000000000001, selected txg 1033574 (601067 ms ago), alloc_txg 1033029, loaded 2201252 ms ago, max_size 2147475456
1636125429   metaslab.c:2538:metaslab_unload(): metaslab_unload: txg 1033689, spa tank, vdev_id 1, ms_id 860, weight 780000000000001, selected txg 1033574 (601067 ms ago), alloc_txg 1033229, loaded 3395548 ms ago, max_size 2147303424
1636125429   metaslab.c:2538:metaslab_unload(): metaslab_unload: txg 1033689, spa tank, vdev_id 1, ms_id 863, weight 7c0000000000001, selected txg 1033574 (601067 ms ago), alloc_txg 1033448, loaded 4046753 ms ago, max_size 4294926336

Not sure if that helps….

        - Chris