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Date:      Wed, 24 Jul 2019 10:12:00 +0000
From:      bugzilla-noreply@freebsd.org
To:        net@FreeBSD.org
Subject:   [Bug 239351] [panic] spin lock held too long under heavy load (net/wireguard affected)
Message-ID:  <bug-239351-7501-9irHH77Yr7@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-239351-7501@https.bugs.freebsd.org/bugzilla/>
References:  <bug-239351-7501@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D239351

--- Comment #3 from Evilham <contact@evilham.com> ---
Created attachment 206031
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D206031&action=
=3Dedit
coredump_nowg_onboot_net_up

Actually, I meant to update this bug report yesterday but didn't manage to.

I have seen this kernel panic again without WireGuard, though it does happen
way more often with it and I can produce the panic with it but can't reliab=
ly
(ehem) panic the system without it.

It actually happened once while booting, but after network was initialised,=
 so
network could still be at fault.

Now I'm quite inclined to believe that this is related to #231760 and booti=
ng
with hw.pci.mcfg=3D0 (the only way to boot atm); but my knowledge of FreeBS=
D's
inners is not up to the task to fully pin-point it.

I have two more dumps, please note that even if drm-kmod is present and
somewhat verbose, it was not present on the system at the time of the first
dump; so it'd be misleading to think it's caused by it.

--=20
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