From nobody Sat Apr 18 17:38:37 2026 X-Original-To: current@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4fyf9r1WPxz67CFP; Sat, 18 Apr 2026 17:38:40 +0000 (UTC) (envelope-from tuexen@FreeBSD.org) Received: from smtp.freebsd.org (smtp.freebsd.org [96.47.72.83]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "smtp.freebsd.org", Issuer "R12" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 4fyf9r0DJLz3png; Sat, 18 Apr 2026 17:38:40 +0000 (UTC) (envelope-from tuexen@FreeBSD.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1776533920; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=mvNBY/UDD2C7f7GZI+sPitP9GnbgXy4UC7WUgYNrI9k=; b=K4W/MzE7iGPdkB1S44Pc0VKl/5YQPb9qpCeJcVdLJnUQyDOujmtQBatjbM8Y6G7smJaCsG 3MeIWWxyx9j1rWdoAXHAoEoesDK60ZhSV0xyCJ4hFYbYrcZx+8jU7/GQYta2gJsZUwawLT 26sJznuKNZMr03eRmQOZGPrNQgvUP/Y/zmfvQTzM91MMHym6hq6DGfxIBreGRPII2VjqYh xi4gySnmuagOgUTOaOYTalUvBJesWCG57mpKC38C5K6PkvpgZ5dOVtTyLJBaeHg8Wrjrxy eKu0CLs3z46FY9zkySiM8si9uDMPpOFcxCm7DU/9RtDv/Et6MqecubKTMw29AA== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1776533920; a=rsa-sha256; cv=none; b=J8rIBKiMpof9fvsbgVrJIuayVtudeOtjC0X5aPejVr0f6vEOB5tDKjmFuLhvEEKkTi9i3y HqSq/3w+kjpR44DtnXi0ijkRjQNO5OoR55Zrn4Zja0juIy4EkUckqO8pMe7ceIpQR83wxn FID//KYQWgQjZ9dDtCbvbPmG1x9mTogj7rqve1MuFxyZyBasj4VsHlF674LlAq9X4RmWo0 v7ZMnOiW6DcU8dbKz7eOmhi89OaP1Q6ePTzCv1t9dSU/s5EKSiS2cMYsl+CriXg9E83B6j NnpqYB/8MsAh5ZP4th/WlM7IjWoTcvzJ2zLH4QeWl4i8wXUWrcG/Y8pA9CloIA== ARC-Authentication-Results: i=1; mx1.freebsd.org; none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1776533920; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=mvNBY/UDD2C7f7GZI+sPitP9GnbgXy4UC7WUgYNrI9k=; b=NkUapJZla+rpYpOkIBo77vxgikDL4T0IBIX4Z1ChJYUuDxQAPJuGnOZfadO+sPseMiWKl6 RuojvJrfwUzIhfRcNHyz8Td7gEs+qR4j4SSYA17vAnRsoIbxx82ogG/irXJc1jnA5sf7qC ATlsUmyqy4m2Ib2auM74fcwprqheizzF4HLcALrwxSw+Uh3RajMZmDsW/v5ktTiIovjRoA XPwFtcJHDI/qhuhOTrTRnDfdqG3r+UKkV2fBy0BHhQTUh6ZSwxTxeyEDHKT4Gobmi9kH6B OEtDCALfLa2O2SZO0bc2cUhd9aUbtACQHrSYwsMRdGXG7Udong513MoLH0I5oQ== Received: from smtpclient.apple (unknown [IPv6:2a02:8109:1101:be00:d835:7117:6c6b:190a]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) (Authenticated sender: tuexen) by smtp.freebsd.org (Postfix) with ESMTPSA id 4fyf9q2rSPzG88; Sat, 18 Apr 2026 17:38:39 +0000 (UTC) (envelope-from tuexen@FreeBSD.org) Content-Type: text/plain; charset=us-ascii List-Id: Discussions about the use of FreeBSD-current List-Archive: https://lists.freebsd.org/archives/freebsd-current List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-current@FreeBSD.org Mime-Version: 1.0 (Mac OS X Mail 16.0 \(3864.500.181\)) Subject: Re: panic: assertion failed in iflib_txq_drain() From: Michael Tuexen In-Reply-To: Date: Sat, 18 Apr 2026 19:38:37 +0200 Cc: Ricardo Branco , freebsd-current@freebsd.org Content-Transfer-Encoding: quoted-printable Message-Id: References: <9d640ae4-7133-4d4f-917f-d715ab71ee7b@suse.de> To: current@freebsd.org X-Mailer: Apple Mail (2.3864.500.181) > On 18. Apr 2026, at 19:14, David Wolfskill = wrote: >=20 > 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? >=20 > Apparently not -- they are em(4), iwm(4), & iwn(4), while the = panicking > machine uses igb(4). >=20 >> I do see the problem also on one of my machines and local testing = shows that >> = https://cgit.FreeBSD.org/src/commit/?id=3D3fade68cfdf95ee0b517b5d69b270bd8= da633404 = >> is the problem. At least reverting it locally resolves the problem. >> Can you confirm this? >=20 > I can, and do: after reverting main-n285140-3fade68cfdf9 & = rebuilding, > I am able to ssh in without issue; the machine reports: >=20 > 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 = root@freebeast.catwhisker.org:/common/S3/obj/usr/src/amd64.amd64/sys/GENER= IC amd64 1600015 1600015 >=20 > Thanks! You could also disable TSO. I will put up a review for a fix soon. Best regards Michael >=20 > Peace, > david > --=20 > David H. Wolfskill david@catwhisker.org >=20 > See https://www.catwhisker.org/~david/publickey.gpg for my public key.