Re: [PATCH V4 1/1] powerpc/perf: Fix PMU callbacks to clear pending PMI before resetting an overflown PMC

2021-07-20 Thread Nageswara Sastry
On 21/07/21 11:18 am, Athira Rajeev wrote: Running perf fuzzer showed below in dmesg logs: "Can't find PMC that caused IRQ" This means a PMU exception happened, but none of the PMC's (Performance Monitor Counter) were found to be overflown. There are some corner cases that clears the PMCs

[PATCH V4 1/1] powerpc/perf: Fix PMU callbacks to clear pending PMI before resetting an overflown PMC

2021-07-20 Thread Athira Rajeev
Running perf fuzzer showed below in dmesg logs: "Can't find PMC that caused IRQ" This means a PMU exception happened, but none of the PMC's (Performance Monitor Counter) were found to be overflown. There are some corner cases that clears the PMCs after PMI gets masked. In such cases, the perf