perf symbols: When not using modules, discard its symbols

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1259346563-12568-10-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

2 files changed, 6 insertions, 1 deletions

diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index b6a2941e7786..b788c2f5d672 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -381,6 +381,9 @@ static int dso__split_kallsyms(struct dso *self, struct map *map, struct thread
 
                 module = strchr(pos->name, '\t');
                 if (module) {
+                        if (!thread->use_modules)
+                                goto discard_symbol;
+
                         *module++ = '\0';
 
                         if (strcmp(self->name, module)) {
@@ -420,7 +423,7 @@ static int dso__split_kallsyms(struct dso *self, struct map *map, struct thread
                 }
 
                 if (filter && filter(curr_map, pos)) {
-                        rb_erase(&pos->rb_node, root);
+discard_symbol:         rb_erase(&pos->rb_node, root);
                         symbol__delete(pos);
                 } else {
                         if (curr_map != map) {
@@ -1635,6 +1638,7 @@ int symbol__init(struct symbol_conf *conf)
                 return -1;
         }
 
+        kthread->use_modules = pconf->use_modules;
         if (pconf->use_modules && thread__create_module_maps(kthread) < 0)
                 pr_debug("Failed to load list of modules in use, "
                          "continuing...\n");
diff --git a/tools/perf/util/thread.h b/tools/perf/util/thread.h
index 3bdd9b2276f0..59b0d9b577d6 100644
--- a/tools/perf/util/thread.h
+++ b/tools/perf/util/thread.h
@@ -10,6 +10,7 @@ struct thread {
         struct rb_root          maps[MAP__NR_TYPES];
         struct list_head        removed_maps[MAP__NR_TYPES];
         pid_t                   pid;
+        bool                    use_modules;
         char                    shortname[3];
         char                    *comm;
         int                     comm_len;