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| author |   Peter Zijlstra <peterz@infradead.org> | 2018-11-20 18:08:42 +0100 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2018-11-20 18:57:48 +0100 |
| commit | 2a5bf23d5b795d5df33dc284e8f5cf8b6a5b4042 (patch) | |
| tree | a8e7207d6415cc41b8458be461909c05abf0062c /tools | |
| parent | Linux 4.20-rc3 (diff) | |
| download | linux-dev-2a5bf23d5b795d5df33dc284e8f5cf8b6a5b4042.tar.xz linux-dev-2a5bf23d5b795d5df33dc284e8f5cf8b6a5b4042.zip | |
perf/x86/intel: Fix regression by default disabling perfmon v4 interrupt handling
Kyle Huey reported that 'rr', a replay debugger, broke due to the following commit:
af3bdb991a5c ("perf/x86/intel: Add a separate Arch Perfmon v4 PMI handler")
Rework the 'disable_counter_freezing' __setup() parameter such that we
can explicitly enable/disable it and switch to default disabled.
To this purpose, rename the parameter to "perf_v4_pmi=" which is a much
better description and allows requiring a bool argument.
[ mingo: Improved the changelog some more. ]
Reported-by: Kyle Huey <me@kylehuey.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: Kan Liang <kan.liang@linux.intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Robert O'Callahan <robert@ocallahan.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: acme@kernel.org
Link: http://lkml.kernel.org/r/20181120170842.GZ2131@hirez.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'tools')
0 files changed, 0 insertions, 0 deletions