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Subject[PATCH v2 36/40] tracing: Remove lookups from tracing_map hitcount
Date
Lookups inflate the hitcount, making it essentially useless.  Only
inserts and updates should really affect the hitcount anyway, so
explicitly filter lookups out.

Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com>
---
kernel/trace/tracing_map.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/kernel/trace/tracing_map.c b/kernel/trace/tracing_map.c
index a4e5a56..f8e2338 100644
--- a/kernel/trace/tracing_map.c
+++ b/kernel/trace/tracing_map.c
@@ -538,7 +538,8 @@ static inline bool keys_match(void *key, void *test_key, unsigned key_size)
if (test_key && test_key == key_hash) {
if (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;
} else if (unlikely(!entry->val)) {
/*
--
1.9.3
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