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| author | Adrian Hunter <adrian.hunter@intel.com> | 2014-07-22 16:17:10 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2014-07-23 11:12:59 -0300 |
| commit | deaff8b659cf4d34181c087b8cdf74f1eb17b02b (patch) | |
| tree | c8ea4c936701091f4bc8a238fe8cbbe5d6d560de /drivers | |
| parent | a6f6ae99f12e8154d5cde6e8366fc228f68d6ae5 (diff) | |
| download | linux-deaff8b659cf4d34181c087b8cdf74f1eb17b02b.tar.bz2 | |
perf tools: Fix jump label always changing during tracing
Intel PT decoding walks the object code to reconstruct the trace. A
jump label change during tracing causes decoding errors.
The "Enable close-on-exec flag on perf file descriptor" patch caused
there to be always a jump label change.
It was found that using a per-cpu context instead of a per-thread
context for the probe of the close-on-exec feature, made the problem go
away.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1406035081-14301-2-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'drivers')
0 files changed, 0 insertions, 0 deletions