diff options
| author | Kan Liang <kan.liang@linux.intel.com> | 2018-02-20 13:11:50 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2018-03-09 10:22:18 +0300 |
| commit | 82d71ed0277efc45360828af8c4e4d40e1b45352 (patch) | |
| tree | 20ae4204e2db11401885a18458f13059cc2b6838 /arch/x86/events/intel/ds.c | |
| parent | f605cfca8c39ffa2b98c06d2b9f30ba64f1e54e3 (diff) | |
| download | linux-82d71ed0277efc45360828af8c4e4d40e1b45352.tar.xz | |
perf/x86/intel: Properly save/restore the PMU state in the NMI handler
The PMU is disabled in intel_pmu_handle_irq(), but cpuc->enabled is not updated
accordingly.
This is fine in current usage because no-one checks it - but fix it
for future code: for example, the drain_pebs() will be modified to
fix an auto-reload bug.
Properly save/restore the old PMU state.
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: acme@kernel.org
Cc: kernel test robot <fengguang.wu@intel.com>
Link: http://lkml.kernel.org/r/6f44ee84-56f8-79f1-559b-08e371eaeb78@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/events/intel/ds.c')
0 files changed, 0 insertions, 0 deletions