On Tue, 04 Feb 2025 21:05:26 +0530, Vaibhav Jain wrote: > Commit 176cda0619b6 ("powerpc/perf: Add perf interface to expose vpa > counters") introduced 'vpa_pmu' to expose Book3s-HV nested APIv2 provided > L1<->L2 context switch latency counters to L1 user-space via > perf-events. However the newly introduced PMU named 'vpa_pmu' doesn't > assign ownership of the PMU to the module 'vpa_pmu'. Consequently the > module 'vpa_pmu' can be unloaded while one of the perf-events are still > active, which can lead to kernel oops and panic of the form below on a > Pseries-LPAR: > > [...] Applied to powerpc/next. [1/1] powerpc/perf: Fix ref-counting on the PMU 'vpa_pmu' https://git.kernel.org/powerpc/c/ff99d5b6a246715f2257123cdf6c4a29cb33aa78 Thanks