Re: panic: assertion failed in iflib_txq_drain()

David Wolfskill <[email protected]>
Newsgroups gmane.os.freebsd.current
Message-ID <[email protected]>
On Sat, Apr 18, 2026 at 03:53:33PM +0200, Michael Tuexen wrote:
> ...
> > So... one of the machines on which I track head got this, as well -- my
> > (mostly-)headless build machine.  (2 laptops, updated in sync with the
> > build machine, did not panic.  One of those also uses a wired NIC.)
> Do the network drivers of the machines not being affected use iflib?

Apparently not -- they are em(4), iwm(4), & iwn(4), while the panicking
machine uses igb(4).

> I do see the problem also on one of my machines and local testing shows that
> https://cgit.FreeBSD.org/src/commit/?id=3fade68cfdf95ee0b517b5d69b270bd8da633404 <https://cgit.freebsd.org/src/commit/?id=3fade68cfdf95ee0b517b5d69b270bd8da633404>
> is the problem. At least reverting it locally resolves the problem.
> Can you confirm this?

I can, and do:  after reverting main-n285140-3fade68cfdf9 & rebuilding,
I am able to ssh in without issue; the machine reports:

freebeast(16.0-C)[2] uname -aUK
FreeBSD freebeast.catwhisker.org 16.0-CURRENT FreeBSD 16.0-CURRENT #549 main-n285180-23a84efeb191: Sat Apr 18 17:01:25 UTC 2026     [email protected]:/common/S3/obj/usr/src/amd64.amd64/sys/GENERIC amd64 1600015 1600015

Thanks!

Peace,
david
-- 
David H. Wolfskill                              [email protected]

See https://www.catwhisker.org/~david/publickey.gpg for my public key.
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