[Bug 275594] High CPU usage by arc_prune; analysis and fix

From: <bugzilla-noreply_at_freebsd.org>
Date: Mon, 19 Feb 2024 13:22:06 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=275594

--- Comment #59 from Peter Much <pmc@citylink.dinoex.sub.org> ---
Endless loop in arc_prune has happened again. 

There is no poudriere and no builds in use here, just a (mostly) idle desktop
with (mostly) default settings, still at 13.3-BETA1.

I then randomly changed some sysctl (with not much hope) and intended to pull a
crashdump when I'm done with my open editors. Then after about half an hour the
weirdness just stopped and arc_prune is back in the usual kstack; no idea if
due to the sysctl changes or for other reasons.

I'll work myself thru all the material here when I find time to, but I am not
interested in fixing poudriere (which I do not use).

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