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37 lines
1.3 KiB
Diff
37 lines
1.3 KiB
Diff
From dbc516c436397e139294abec327a70aa52704927 Mon Sep 17 00:00:00 2001
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From: Tom Zanussi <tom.zanussi@linux.intel.com>
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Date: Fri, 22 Sep 2017 14:58:18 -0500
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Subject: [PATCH 074/418] tracing: Remove lookups from tracing_map hitcount
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Lookups inflate the hitcount, making it essentially useless. Only
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inserts and updates should really affect the hitcount anyway, so
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explicitly filter lookups out.
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Link: http://lkml.kernel.org/r/c8d9dc39d269a8abf88bf4102d0dfc65deb0fc7f.1506105045.git.tom.zanussi@linux.intel.com
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Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com>
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Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
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(cherry picked from commit 83c07ecc4203728e85fc4a2ce6fdf25d16ea118e)
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Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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---
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kernel/trace/tracing_map.c | 3 ++-
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1 file changed, 2 insertions(+), 1 deletion(-)
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diff --git a/kernel/trace/tracing_map.c b/kernel/trace/tracing_map.c
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index 305039b122fa..07e75344725b 100644
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--- a/kernel/trace/tracing_map.c
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+++ b/kernel/trace/tracing_map.c
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@@ -428,7 +428,8 @@ __tracing_map_insert(struct tracing_map *map, void *key, bool lookup_only)
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if (test_key && test_key == key_hash && entry->val &&
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keys_match(key, entry->val->key, map->key_size)) {
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- atomic64_inc(&map->hits);
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+ if (!lookup_only)
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+ atomic64_inc(&map->hits);
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return entry->val;
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}
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--
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2.17.1
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