28 lines
990 B
Diff
28 lines
990 B
Diff
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 04/42] tracing: Remove lookups from tracing_map hitcount
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Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.14/older/patches-4.14.6-rt7.tar.xz
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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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Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com>
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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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--- a/kernel/trace/tracing_map.c
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+++ b/kernel/trace/tracing_map.c
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@@ -428,7 +428,8 @@ static inline struct tracing_map_elt *
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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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