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authorTom Zanussi <tom.zanussi@linux.intel.com>2017-09-22 14:58:18 -0500
committerSteven Rostedt (VMware) <rostedt@goodmis.org>2017-10-04 13:05:42 -0400
commit83c07ecc4203728e85fc4a2ce6fdf25d16ea118e (patch)
treec104ef79f4e69ac38d0f30b1abef8bc7101f4d87 /kernel/trace/tracing_map.c
parenta15f7fc20389a8827d5859907568b201234d4b79 (diff)
tracing: Remove lookups from tracing_map hitcount
Lookups inflate the hitcount, making it essentially useless. Only inserts and updates should really affect the hitcount anyway, so explicitly filter lookups out. Link: http://lkml.kernel.org/r/c8d9dc39d269a8abf88bf4102d0dfc65deb0fc7f.1506105045.git.tom.zanussi@linux.intel.com Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/tracing_map.c')
-rw-r--r--kernel/trace/tracing_map.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/trace/tracing_map.c b/kernel/trace/tracing_map.c
index 305039b122fa..07e75344725b 100644
--- a/kernel/trace/tracing_map.c
+++ b/kernel/trace/tracing_map.c
@@ -428,7 +428,8 @@ __tracing_map_insert(struct tracing_map *map, void *key, bool lookup_only)
if (test_key && test_key == key_hash && entry->val &&
keys_match(key, entry->val->key, map->key_size)) {
- atomic64_inc(&map->hits);
+ if (!lookup_only)
+ atomic64_inc(&map->hits);
return entry->val;
}