Launchpad has imported 4 comments from the remote bug at https://bugzilla.kernel.org/show_bug.cgi?id=194569.
If you reply to an imported comment from within Launchpad, your comment will be sent to the remote bug automatically. Read more about Launchpad's inter-bugtracker facilities at https://help.launchpad.net/InterBugTracking. ------------------------------------------------------------------------ On 2017-02-12T22:39:08+00:00 caravena wrote: Open bug in launchpad.net https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1664072 "dmesg: [ 7578.057461] TCP: wlp1s0: Driver has suspect GRO implementation, TCP performance may be compromised." Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1664072/comments/2 ------------------------------------------------------------------------ On 2018-06-05T12:03:22+00:00 pedretti.fabio wrote: This harmless warning should be fixed backporting [0] to 4.9 series. [0] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0b9aefea860063bb39e36bd7fe6c7087fed0ba87 Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1664072/comments/5 ------------------------------------------------------------------------ On 2018-06-08T15:15:25+00:00 marcelo.leitner wrote: I went over iwlwifi commits since then and I couldn't find any issue regarding TCP/GSO. That said, I agree that it seems to be harmless in that setup and that backporting 0b9aefea860063bb39e36bd7fe6c7087fed0ba87 should help on identifying if it's a false-positive or not. Someone needs to send an email to netdev@ asking for it, though. kernel bugzilla is not how it's done for networking subsystem. More info in ./Documentation/networking/netdev-FAQ.txt . Thanks. Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1664072/comments/6 ------------------------------------------------------------------------ On 2018-06-08T15:40:05+00:00 pedretti.fabio wrote: BTW, I had this same warning with vmxnet3 driver with 4.9. I tried a newer kernel and the message didn't appear. I posted my findings here: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=864642#95 - for reference: === It looks like the warning appeared with this first commit: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=dcb17d22e1c2cd72e72190c736349a675362b3bc but was later corrected with this second one: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0b9aefea860063bb39e36bd7fe6c7087fed0ba87 The first commit was merged in the 4.9 tree, but not the second one (at least not up to 4.9.106), and was only merged in 4.11. So I would conclude the warning may be harmless, unless you got it on a >= 4.11 kernel. And I also verified I don't get it on such a newer kernel. I would close this bug, but it may eventually be nice to backport the second commit in 4.9 to avoid the harmless warning. === Searching on the net, there are other reports with the same issue and with various other drivers. I added in CC: here the net/ipv4 maintainers I found in MAINTAINERS file: NETWORKING [IPv4/IPv6] M: "David S. Miller" <da...@davemloft.net> M: Alexey Kuznetsov <kuz...@ms2.inr.ac.ru> M: Hideaki YOSHIFUJI <yoshf...@linux-ipv6.org> L: net...@vger.kernel.org T: git git://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git S: Maintained F: net/ipv4/ F: net/ipv6/ F: include/net/ip* F: arch/x86/net/* Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1664072/comments/7 ** Changed in: linux Status: Unknown => Confirmed ** Changed in: linux Importance: Unknown => Medium -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1664072 Title: TCP: wlp1s0: Driver has suspect GRO implementation, TCP performance may be compromised. Status in Linux: Confirmed Status in linux package in Ubuntu: Fix Released Status in linux package in Debian: Confirmed Bug description: dmesg: [ 7578.057461] TCP: wlp1s0: Driver has suspect GRO implementation, TCP performance may be compromised. ProblemType: Bug DistroRelease: Ubuntu 17.04 Package: linux-image-4.9.0-15-generic 4.9.0-15.16 ProcVersionSignature: Ubuntu 4.9.0-15.16-generic 4.9.5 Uname: Linux 4.9.0-15-generic x86_64 ApportVersion: 2.20.4-0ubuntu2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/pcmC0D0p: caravena 2378 F...m pulseaudio /dev/snd/controlC0: caravena 2378 F.... pulseaudio CurrentDesktop: GNOME Date: Sun Feb 12 19:34:40 2017 HibernationDevice: RESUME=UUID=360bd2d2-4f44-4311-86d6-4781ac81ee87 InstallationDate: Installed on 2015-07-26 (567 days ago) InstallationMedia: Ubuntu-GNOME 15.10 "Wily Werewolf" - Alpha amd64 (20150723) MachineType: SAMSUNG ELECTRONICS CO., LTD. 530U3C/530U4C ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.9.0-15-generic root=UUID=4f4435ca-b877-47a5-9065-3dd624c0514e ro rootflags=subvol=@ quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.9.0-15-generic N/A linux-backports-modules-4.9.0-15-generic N/A linux-firmware 1.162 SourcePackage: linux UpgradeStatus: Upgraded to zesty on 2016-10-29 (106 days ago) dmi.bios.date: 04/15/2013 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P14AAJ dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP14AAJ:bd04/15/2013:svnSAMSUNGELECTRONICSCO.,LTD.:pn530U3C/530U4C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.product.name: 530U3C/530U4C dmi.product.version: 0.1 dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. 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