Re: ZFS high CPU use after backup and panic on shutdown

From: Pete French <pete_at_twisted.org.uk>
Date: Wed, 29 Nov 2023 21:10:29 UTC 

On 29/11/2023 20:58, Trev wrote:
> Trev wrote on 28/11/23 12:09 am:
> ARGH. After a few days the issue has again returned. top -S -H shows 
> that the process which continues to consume 100% of one CPU core is 
> arc_prune, the same process that causes a kernel panic on shutdown.
> 
> Any ideas on how to resolve this?
> 


I would think you are seeing this:

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=274698

Which was fixed by this:

https://freshbsd.org/freebsd/src?q=commit%3A3ec4ea68d*

So upgrade to a 14-STABLE after that and you will be fine. You probably 
want to upfrade as far as today though, to pick up some of the other 
fixes which went into OpenZFS.

-pete.