This bug is awaiting verification that the linux-realtime/6.8.1-1006.6 kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-noble-linux-realtime' to 'verification-done- noble-linux-realtime'. If the problem still exists, change the tag 'verification-needed-noble-linux-realtime' to 'verification-failed- noble-linux-realtime'.
If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: kernel-spammed-noble-linux-realtime-v2 verification-needed-noble-linux-realtime -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-realtime in Ubuntu. https://bugs.launchpad.net/bugs/2071853 Title: Disable DEBUG_PREEMPT in jammy and noble realtime kernels Status in ubuntu-realtime: Fix Committed Status in linux-realtime package in Ubuntu: Fix Committed Status in linux-realtime source package in Jammy: Fix Committed Status in linux-realtime source package in Noble: Fix Committed Bug description: SRU Justification: [Impact] CONFIG_DEBUG_PREEMPT was accidentally enabled on jammy last year as part of 5.15.0-1040.45 when we migrated to annotations for kernel configs. It was also copied into the noble realtime kernel. This config can introduce additional latency. More info on this config is at https://cateee.net/lkddb/web-lkddb/DEBUG_PREEMPT.html [Fix] CONFIG_DEBUG_PREEMPT should be disabled on both jammy and noble. [Test Plan] We will use our kernel regression testing to confirm this doesn't cause any regressions. This will include cyclictest and other latency tests. [Where problems could occur] This change is limited. If code elsewhere inadvertently depends on this additional latency, it could cause a problem. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-realtime/+bug/2071853/+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
