Fix sent to mailing list: https://lists.ubuntu.com/archives/kernel-team/2020-August/112505.html https://lists.ubuntu.com/archives/kernel-team/2020-August/112506.html
** Description changed: + == SRU Justification [ FOCAL ] == + + The msg_zerocopy.sh kernel self test will fail on machines that don't + have 2 or 3 CPUs such as 1 CPU cloud instances since the C test program + tries to set CPU affinity to CPUs 2 and 3 and bails out if it fails. + + == Fix == + + Upstream linux-next commit + + commit 16f6458f2478b55e2b628797bc81a4455045c74e + Author: Willem de Bruijn <[email protected]> + Date: Wed Aug 5 04:40:45 2020 -0400 + + selftests/net: relax cpu affinity requirement in msg_zerocopy test + + The fix now just emits a warning that CPU affinity can't be set rather + than cause an exit(1) termination. + + == Test cast == + + Run the msg_zerocopy.sh test from the kernel net selftest on a 1 CPU + system. Without the fix the test fails. With the fix it runs + successfully as expected. + + == Regression Potential == + + The original test pinned the CPUs for a benchmarking metric, for our + testing we are using this to test to see if the operations in the test + work successfully. There is a potential that users using this test will + not notice the warning if they are using this test as a benchmark on a 1 + CPU system and may get more jittery timing in their benchmarks rather + than a test failing and complaining they are not running it on a + suitable multi-CPU system. However, the likelyhood of a user using this + test on a single CPU system for benchmarking is small and as it stands + the test will now run and produce potentially jittery benchmarks on a 1 + CPU system compared to previously where it never ran. + + -------------------- + This test will return 1 - $ sudo ./msg_zerocopy.sh + $ sudo ./msg_zerocopy.sh ipv4 tcp -t 1 ./msg_zerocopy: setaffinity 2 ./msg_zerocopy: setaffinity 3 $ echo $? 1 ProblemType: Bug DistroRelease: Ubuntu 18.10 Package: linux-image-4.18.0-13-generic 4.18.0-13.14 ProcVersionSignature: User Name 4.18.0-13.14-generic 4.18.17 Uname: Linux 4.18.0-13-generic x86_64 AlsaDevices: - total 0 - crw-rw---- 1 root audio 116, 1 Jan 21 07:41 seq - crw-rw---- 1 root audio 116, 33 Jan 21 07:41 timer + total 0 + crw-rw---- 1 root audio 116, 1 Jan 21 07:41 seq + crw-rw---- 1 root audio 116, 33 Jan 21 07:41 timer AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay' ApportVersion: 2.20.10-0ubuntu13.1 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord': 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: Date: Mon Jan 21 07:50:33 2019 IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig' Lsusb: Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub MachineType: QEMU Standard PC (i440FX + PIIX, 1996) PciMultimedia: - + ProcFB: 0 cirrusdrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.18.0-13-generic root=UUID=2a4b0342-a2dd-4feb-b3e2-9644ca1c4a60 ro console=ttyS0,115200n8 RelatedPackageVersions: - linux-restricted-modules-4.18.0-13-generic N/A - linux-backports-modules-4.18.0-13-generic N/A - linux-firmware 1.175.1 + linux-restricted-modules-4.18.0-13-generic N/A + linux-backports-modules-4.18.0-13-generic N/A + linux-firmware 1.175.1 RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill' SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 04/01/2014 dmi.bios.vendor: SeaBIOS dmi.bios.version: Ubuntu-1.8.2-1ubuntu1 dmi.chassis.type: 1 dmi.chassis.vendor: QEMU dmi.chassis.version: pc-i440fx-xenial dmi.modalias: dmi:bvnSeaBIOS:bvrUbuntu-1.8.2-1ubuntu1:bd04/01/2014:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-xenial:cvnQEMU:ct1:cvrpc-i440fx-xenial: dmi.product.name: Standard PC (i440FX + PIIX, 1996) dmi.product.version: pc-i440fx-xenial dmi.sys.vendor: QEMU ** Changed in: linux (Ubuntu Eoan) Status: New => Won't Fix ** Changed in: linux-aws (Ubuntu Eoan) Status: New => Won't Fix ** Changed in: linux-azure (Ubuntu Eoan) Status: New => Won't Fix -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1812620 Title: msg_zerocopy.sh in net from ubuntu_kernel_selftests failed To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-kernel-tests/+bug/1812620/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
