From owner-freebsd-net@freebsd.org Wed May 22 21:43:27 2019 Return-Path: Delivered-To: freebsd-net@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 01CA015B8600 for ; Wed, 22 May 2019 21:43:27 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.ysv.freebsd.org (mailman.ysv.freebsd.org [IPv6:2001:1900:2254:206a::50:5]) by mx1.freebsd.org (Postfix) with ESMTP id 8A5626C5A6 for ; Wed, 22 May 2019 21:43:26 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.ysv.freebsd.org (Postfix) id 48C3115B85FF; Wed, 22 May 2019 21:43:26 +0000 (UTC) Delivered-To: net@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 35FB515B85FE for ; Wed, 22 May 2019 21:43:26 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.ysv.freebsd.org (mxrelay.ysv.freebsd.org [IPv6:2001:1900:2254:206a::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.ysv.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id C49F06C5A1 for ; Wed, 22 May 2019 21:43:25 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.ysv.freebsd.org (Postfix) with ESMTPS id A76121699 for ; Wed, 22 May 2019 21:43:24 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id x4MLhO5E010932 for ; Wed, 22 May 2019 21:43:24 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id x4MLhOIc010931 for net@FreeBSD.org; Wed, 22 May 2019 21:43:24 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: net@FreeBSD.org Subject: [Bug 234766] em(4) Intel 82579LM regression on Supermicro X9SCM-F Date: Wed, 22 May 2019 21:43:24 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 12.0-RELEASE X-Bugzilla-Keywords: IntelNetworking, regression X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: freebsd@coombscloud.com X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: net@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: cc Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 22 May 2019 21:43:27 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D234766 freebsd@coombscloud.com changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |freebsd@coombscloud.com --- Comment #7 from freebsd@coombscloud.com --- I'm seeing similar behavior on a different Intel chip: $ freebsd-version -kr 12.0-RELEASE-p4 12.0-RELEASE-p4 $ pciconf -lv ... em0@pci0:0:31:6: class=3D0x020000 card=3D0x86721043 chip=3D0x15b8808= 6 rev=3D0x31 hdr=3D0x00 vendor =3D 'Intel Corporation' device =3D 'Ethernet Connection (2) I219-V' class =3D network subclass =3D ethernet I will suddenly get the following kernel messages (the avail and pidx values differ at each failure): kernel: em0: TX(0) desc avail =3D 42, pidx =3D 208 kernel: em0: link state changed to DOWN Followed by a constant stream of the following messages: kernel: em0: TX(0) desc avail =3D 1024, pidx =3D 0 This seems to be triggered by periods of high network activity. For example, another computer has a backup task set to run once daily, which backs up a SAMBA share hosted by this computer. This network failure often happens sho= rtly after that task begins. I used 11.2-RELASE on this computer for some time and never encountered this behavior with it. I'll give net/intel-em-kmod a try. --=20 You are receiving this mail because: You are the assignee for the bug.=