Fixes released in 5.4.0-108.122~18.04.1. -- 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/1932117
Title: Lots of hisi_qm zombie task slow down system after stress test Status in kunpeng920: Fix Released Status in kunpeng920 ubuntu-18.04-hwe series: Fix Released Status in kunpeng920 ubuntu-20.04 series: Fix Released Status in linux package in Ubuntu: Invalid Status in linux source package in Focal: Fix Released Status in linux source package in Hirsute: Invalid Status in linux source package in Impish: Invalid Bug description: [Impact] hisi_qm does not clean up kernel process after calculation is done. Many zombie processes slow down system. After checkbox cpu stress test, it takes more then 2min to ssh in. [Test Plan] 1) stress-ng --aggressive --verify --timeout 300 --metrics-brief --tz --times --af-alg 0 2) ps aux | grep hisi_qm | wc -l Expected result is less then 100 [Regression Risk] hisi_qm only affects kunpeng920 platform. Minimal risk for other platform, and full regression test is needed on kunpeng920. ======================= [Bug Description] With focal 5.4 kernel, crypto driver does not clean up its created process when calculation is done. Many zombie processes slow down system. e.g. Takes more then 10sec for ssh connection. [Steps to Reproduce] 1) Install Ubuntu 20.04 with GA (5.4) kernel 2) sudo apt install -y stress-ng 3) stress-ng --aggressive --verify --timeout 300 --metrics-brief --tz --times --af-alg 0 4) ps aux | grep hisi_qm | wc -l [Actual Results] >100000 [Expected Results] <100 [Reproducibility] 100% [Additional information] Can not reproduce with focal HWE (5.8) kernel. [Resolution] To manage notifications about this bug go to: https://bugs.launchpad.net/kunpeng920/+bug/1932117/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
