(1) The first patch fixes a situation like this Before patch:- ------------
./perf record -j any -e branch-misses:k ls Error: The sys_perf_event_open() syscall returned with 95 (Operation not supported) for event (branch-misses:k). /bin/dmesg may provide additional information. No CONFIG_PERF_EVENTS=y kernel support configured? Here 'perf record' actually copies over ':k' filter request into BHRB privilege state filter config and our previous check in kernel would fail that. After patch:- ------------- /perf record -j any -e branch-misses:k ls perf perf.data perf.data.old test-mmap-ring [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.002 MB perf.data (~102 samples) ] (2) The second patch fixes context migration for BHRB filter configuration Anshuman Khandual (2): powerpc, perf: Ignore separate BHRB privilege state filter request powerpc, perf: BHRB filter configuration should follow the task arch/powerpc/perf/core-book3s.c | 5 ++++- arch/powerpc/perf/power8-pmu.c | 17 +++++++++-------- 2 files changed, 13 insertions(+), 9 deletions(-) -- 1.7.11.7 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
