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[2a02:1811:250b:2400:5461:4fb6:dea4:5fc8]) by smtp.gmail.com with ESMTPSA id o47-v6sm4286484edc.95.2018.04.30.00.54.47 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 30 Apr 2018 00:54:47 -0700 (PDT) Message-ID: <5ae6cbc7.1c69fb81.ed649.655e@mx.google.com> MIME-Version: 1.0 To: Tom Jones Cc: "freebsd-net@freebsd.org" From: Dries Michiels Subject: RE: kernel: in6_delayed_cksum: delayed m_pullup Date: Mon, 30 Apr 2018 09:54:48 +0200 Importance: normal X-Priority: 3 In-Reply-To: <20180429190450.GA97911@tom-desk.erg.abdn.ac.uk> References: <5ae60f44.1c69fb81.ee4a5.1043@mx.google.com> <20180429190450.GA97911@tom-desk.erg.abdn.ac.uk> Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.25 X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 30 Apr 2018 07:54:50 -0000 Tom, I=E2=80=99m using the igb (intel I210) driver for my LAN interface and the = em (intel I219-V) driver for the WAN interface. I use this FreeBSD box as my home server so I wouldn=E2=80=99t say that it = has a heavy ipv6 workload. Regards, Dries From: Tom Jones Sent: zondag 29 april 2018 21:05 To: Dries Michiels Cc: freebsd-net@freebsd.org Subject: Re: kernel: in6_delayed_cksum: delayed m_pullup On Sun, Apr 29, 2018 at 08:30:28PM +0200, Dries Michiels wrote: > Dear mailing list, >=20 > After upgrading my FreeBSD server from source from: > FreeBSD 11.1-STABLE (VADOS) #9 r331859: Sun Apr 1 12:09:18 CEST 2018=20 > to > FreeBSD 11.2-PRERELEASE (VADOS) #10 r333091: Sun Apr 29 16:48:44 CEST 201= 8 >=20 > My /var/log/messages is getting spammed by the following notice/error: > Apr 29 19:51:42 vados kernel: in6_delayed_cksum: delayed m_pullup, m->len= : 48 plen 68 off 56 csum_flags=3D400 > Apr 29 19:55:34 vados last message repeated 11 times > Apr 29 20:11:56 vados last message repeated 10 times > Apr 29 20:12:42 vados last message repeated 4 times >=20 > Does anyone have a clue what this indicates? An error it seems: if (offset + sizeof(u_short) > m->m_len) { printf("%s: delayed m_pullup, m->len: %d plen %u off %u " "csum_flags=3D%b\n", __func__, m->m_len, plen, offset, (int)m->m_pkthdr.csum_flags, CSUM_BITS); /* * XXX this should not happen, but if it does, the correct * behavior may be to insert the checksum in the appropriate * next mbuf in the chain. */ return; } > I did not have this message on my older system (r331859). What network hardware are you using?=20 Do you have a heavy ipv6 workload that might be a source? - [tj]