[Bug 2143080] Re: [Ubuntu 26.04] Running iperf3 client for longer duration causes OOM on guest
Hi Aniket, we want to ask you if you can upgrade to the latest kernel available (just by executing on the existing system: sudo apt update && sudo apt full-upgrade # and a reboot – it should bring you to 7.0.0.-13.13), since there is a certain chance that this issue could be fixed with the updated (latest) kernel. As of today we do not have the right hardware to clone the setup on our side (it req. nested virtualization), Hence IF it will still fail for you, even with the latest kernel installed, we will consider adding this as a known issue to the release notes. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2143080 Title: [Ubuntu 26.04] Running iperf3 client for longer duration causes OOM on guest To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/2143080/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2143080] Re: [Ubuntu 26.04] Running iperf3 client for longer duration causes OOM on guest
** Also affects: ubuntu-power-systems Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2143080 Title: [Ubuntu 26.04] Running iperf3 client for longer duration causes OOM on guest To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/2143080/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2143080] Re: [Ubuntu 26.04] Running iperf3 client for longer duration causes OOM on guest
Yes please attach dmesg logs of rc2 test -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2143080 Title: [Ubuntu 26.04] Running iperf3 client for longer duration causes OOM on guest To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2143080/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2143080] Re: [Ubuntu 26.04] Running iperf3 client for longer duration causes OOM on guest
You are saying that by using 7.0-rc3 from upstream (in both host and guest) you are not able to reproduce the issue, while using 7.0.0-6.6 resolute kernel (in both host and guest) the bug is reproducible ... interesting. Can you please attach logs for the upstream 7.0-rc3? Can you also provide the configs you are using to build the upstream kernel? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2143080 Title: [Ubuntu 26.04] Running iperf3 client for longer duration causes OOM on guest To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2143080/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2143080] Re: [Ubuntu 26.04] Running iperf3 client for longer duration causes OOM on guest
Thanks Aniket for the info. We already rebased our resolute kernel on top op rc3. It's in the proposed pocket, version 7.0.0-6.6. Can you please confirm the issue is not reproducible on it too? ** Also affects: linux (Ubuntu Resolute) Importance: Undecided Assignee: Ubuntu on IBM Power Systems Bug Triage (ubuntu-power-triage) Status: New ** Changed in: linux (Ubuntu Resolute) Assignee: Ubuntu on IBM Power Systems Bug Triage (ubuntu-power-triage) => Massimiliano Pellizzer (mpellizzer) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2143080 Title: [Ubuntu 26.04] Running iperf3 client for longer duration causes OOM on guest To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2143080/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2143080] Re: [Ubuntu 26.04] Running iperf3 client for longer duration causes OOM on guest
I wanted to point at "pagetables:1452160kB" at the beginning of the OOM reports.
That is 1.4G of a 4GB system which seems non proportional.
Also "slab_unreclaimable:11360" on a 64k page size system is like 727MB
You might have more advanced trackers (use them then), but comparing the
same scenario with an older working and a new failing kernel and running
something like the following might see how that evolves after the
minutes of the run:
$ while /bin/true; do echo ""; date +%T; cat /proc/meminfo | grep -e
"PageT" -e "Slab" -e "SRecl" -e "SUnrecl"; sleep 3s; done
For the allocations that seem to go insane I'm unsure, I thought of
something like tracing them `sudo bpftrace -e
'tracepoint:kmem:mm_page_alloc { @[comm] = count(); }'` but in an
already overloaded system that will lose many events and your end
condition does not allow to evaluate the collected data - so that might
not be the best approach. The kernel folks will know better than me
anyway.
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[Ubuntu 26.04] Running iperf3 client for longer duration causes OOM on
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[Bug 2143080] Re: [Ubuntu 26.04] Running iperf3 client for longer duration causes OOM on guest
Since you already installed 6.19 you can try it to see if we already solved the bug there. To install 7.0, instead, try the following: $ sudo apt install linux-image-7.0.0-3-generic linux-modules-7.0.0-3-generic -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2143080 Title: [Ubuntu 26.04] Running iperf3 client for longer duration causes OOM on guest To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2143080/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2143080] Re: [Ubuntu 26.04] Running iperf3 client for longer duration causes OOM on guest
Thanks for reporting the bug. From logs I can see you are using Resolute 6.18 kernel. Can you please try to reproduce the bug again updating to 7.0.0-3.3-generic on both the host and the guest? To get the latest kernel you can execute: ``` $ sudo add-apt-repository --yes ppa:canonical-kernel-team/unstable $ sudo apt update && sudo apt upgrade -y ``` -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2143080 Title: [Ubuntu 26.04] Running iperf3 client for longer duration causes OOM on guest To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2143080/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2143080] Re: [Ubuntu 26.04] Running iperf3 client for longer duration causes OOM on guest
** Tags added: kernel-daily-bug -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2143080 Title: [Ubuntu 26.04] Running iperf3 client for longer duration causes OOM on guest To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2143080/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
