diff options
| author | Jiri Olsa <jolsa@kernel.org> | 2015-02-17 19:31:18 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2015-03-23 18:46:51 +0300 |
| commit | bc84f464862489e687c98dea1a8ff20dc4413f93 (patch) | |
| tree | 4b9b11a9c897750695ceda0fc91c25a6c552098d /tools/perf | |
| parent | 907fb509f0f1e35848d9e20b00176319af79101c (diff) | |
| download | linux-bc84f464862489e687c98dea1a8ff20dc4413f93.tar.xz | |
perf tools: Try to lookup kernel module map before creating one
Currently we assume machine__new_module is called only once for each
module so we create its map&dso unconditionally.
However it's possible that it's called multiple times for same module.
Like for perf record:
1) via machine__create_module during machine init
2) via kernel MMAP event processing
Trying to lookup kernel module map before creating one.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-kx76xfqpnrpho5hdaapbqm09@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/util/machine.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c index 1de5438ad070..e3353307330c 100644 --- a/tools/perf/util/machine.c +++ b/tools/perf/util/machine.c @@ -498,6 +498,11 @@ struct map *machine__new_module(struct machine *machine, u64 start, if (kmod_path__parse_name(&m, filename)) return NULL; + map = map_groups__find_by_name(&machine->kmaps, MAP__FUNCTION, + m.name); + if (map) + goto out; + dso = machine__module_dso(machine, &m, filename); if (dso == NULL) goto out; |