Public bug reported: [Impact]
noble patchset 2024-09-30 ( https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2083196 ) caused conflicts and compilation failures with PREEMPT_RT. [Fix] One conflict was caused by 2fd5ad3f310de22836cdacae919dd99d758a1f1b ("perf: Fix event leak upon exit"). This was fixed by moving from the v3 version of the "perf/sigtrap" patchset from PREEMPT_RT 6.8.2-rt11 to the final version of the patchset that made it into 6.11. This final "perf/sigtrap" patchset from mainline 6.11 included the following commits, which applied cleanly: 2b84def990d388bed4afe4f21ae383a01991046c perf: Split __perf_pending_irq() out of perf_pending_irq() 16b9569df9d2ab07eeee075cb7895e9d3e08e8f0 perf: Don't disable preemption in perf_pending_task(). 0d40a6d83e3e6751f1107ba33587262d937c969f perf: Move swevent_htable::recursion into task_struct. 5af42f928f3ac555c228740fb4a92d05b19fdd49 perf: Shrink the size of the recursion counter. c5d93d23a26012a98b77f9e354ab9b3afd420059 perf: Enqueue SIGTRAP always via task_work. 466e4d801cd438a1ab2c8a2cce1bef6b65c31bbb task_work: Add TWA_NMI_CURRENT as an additional notify mode. 058244c683111d44a5de16ac74f19a1754dd7a0c perf: Move irq_work_queue() where the event is prepared. The other issue was a compilation failure due to f70405afc99b1 ("locking: Add rwsem_assert_held() and rwsem_assert_held_write()"). This was fixed by the fix commit from 6.9, fa1f51162338b3e2f520d4bfedc42b3b2e00da6d ("locking: Make rwsem_assert_held_write_nolockdep() build with PREEMPT_RT=y"). [Test Case] Compile and boot test. [Where things could go wrong] If there are patches these depend on that are missed, it could cause performance/latency regressions. ** Affects: ubuntu-realtime Importance: Undecided Status: New ** Affects: linux-realtime (Ubuntu) Importance: Undecided Status: New ** Affects: linux-realtime (Ubuntu Noble) Importance: Undecided Status: New ** Also affects: linux-realtime (Ubuntu) Importance: Undecided Status: New ** Also affects: linux-realtime (Ubuntu Noble) 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/2089700 Title: Fix PREEMPT_RT conflicts caused by 2024-09-30 noble patchset To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-realtime/+bug/2089700/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
