** Tags removed: verification-needed-plucky-linux-intel ** Tags added: verification-done-plucky-linux-intel
-- 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/2114258 Title: [UBUNTU 24.04] Kernel: Add CPUMF extended counter set for z17 Status in Ubuntu on IBM z Systems: Fix Committed Status in linux package in Ubuntu: Invalid Status in linux source package in Noble: Fix Committed Status in linux source package in Oracular: Won't Fix Status in linux source package in Plucky: Fix Committed Status in linux source package in Questing: Invalid Bug description: [ Impact ] s390/cpumf: Update CPU Measurement facility extended counter set support Update CPU Measurement counter facility support for the extended counter set for machine types 9175 and 9176. [ Fix ] Backport the following patch from upstream: - df194f57de71 s390/cpumf: Update CPU Measurement facility extended counter set support [ Test Plan ] Boot a z17 instance and run the command: ls -l /sys/devices/cpum_cf/events | wc -l The output must be 106. [ Where Problems Could Occur ] The fix modifies CPUMF event registration for IBM z17. A bug in this patch may cause incorrect event exposure on unsupported hardware, leading to invalid perf measurements, sysfs inconsistencies, or kernel warnings due to misconfigured or non-existent counters. --- Description: kernel: Add CPUMF extended counter set for new IBM z17 machine Symptom: Extended counter set not exported in /sysfs Problem: The extended counter set is not exported when the kernel is booted. Reproduction: Run command ls -l /sys/devices/cpum_cf/events | wc -l. If the output is not 106, the extended counter set is missing. Solution: Export the extended counter set data in /sysfs when the kernel is booted. Upstream-ID: df194f57de7136b94bf25d2dce1da765b6c13654 Author: <[email protected]> Component: kernel To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-z-systems/+bug/2114258/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
