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| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-11-09 15:04:05 +0100 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-11-11 17:18:52 +0100 |
| commit | 699c12a7cca376d16f75672f9047faa37b184eda (patch) | |
| tree | 6a68d876b73f4b981003c0264c96eb0f51862117 /tools/build/Documentation/Build.txt | |
| parent | perf callchain: Fixup help/config for no-unwinding (diff) | |
| download | linux-699c12a7cca376d16f75672f9047faa37b184eda.tar.xz linux-699c12a7cca376d16f75672f9047faa37b184eda.zip | |
perf intel-pt: Update documentation about context switch events
Since the unprivileged sched switch event was added in perf, PT doesn't
need need perf_event_paranoid=-1 anymore for per cpu decoding.
Add a note stating that that is only needed for kernels < 4.2.
Reported-by: Andi Kleen <ak@linux.intel.com>
Report-Link: http://lkml.kernel.org/r/http://lkml.kernel.org/n/tip-x2ybghpqxxn3zu0m8o7qi42r@git.kernel.org
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Fixes: 45ac1403f564 ("perf: Add PERF_RECORD_SWITCH to indicate context switches")
Link: http://lkml.kernel.org/n/tip-x2ybghpqxxn3zu0m8o7qi42r@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/build/Documentation/Build.txt')
0 files changed, 0 insertions, 0 deletions