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Date:      Fri, 29 Nov 2024 16:19:03 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 282994] Repeated kernel panics
Message-ID:  <bug-282994-227-ourctcGfbD@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-282994-227@https.bugs.freebsd.org/bugzilla/>
References:  <bug-282994-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D282994

--- Comment #5 from Mark Johnston <markj@FreeBSD.org> ---
> `all kinds of problems` sounds scary.

Well, I just meant that without the patch, hitting the swapuse limit could
cause a panic; with the patch, it'll cause shm_alloc() to fail.  In the
backtrace you pasted, the running process was php, so with the patch applie=
d,
either some php script or the runtime would have hit an error instead of
triggering a panic.  Maybe it can tolerate such errors just fine, but I don=
't
know - that's all I meant by "all kinds of problems".

> These happen randomly even when running as root with no rctl rules applie=
d.=20
> - top takes thirty seconds to several minutes to load.=20
> - ps -aux takes several minutes to return results.=20
> - Nullfs mounts take several minutes to apply.

Are you sure that no rctl rules are applied there?

If you sent ctrl-T to the terminal while top/ps/mount are running, what gets
printed?

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