From 767a5e1281ed436a11af90e0249bd59a5fbd40c8 Mon Sep 17 00:00:00 2001
From: Zdenek Kabelac <zkabelac@redhat.com>
Date: Sun, 16 Jul 2017 20:56:58 +0200
Subject: [PATCH] dev-cache: avoid hashing same data again

Before hashing device again with path, check if it's not already hashed.

TODO: maybe bigger chunk of executed code might be actually skipped.
---
 lib/device/dev-cache.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/lib/device/dev-cache.c b/lib/device/dev-cache.c
index 06d44ce2b..9a4dbc90a 100644
--- a/lib/device/dev-cache.c
+++ b/lib/device/dev-cache.c
@@ -706,6 +706,12 @@ static int _insert_dev(const char *path, dev_t d)
 		}
 	}
 
+	if (dm_hash_lookup(_cache.names, path) == dev) {
+		/* Hash already has matching entry present */
+		log_debug("Path already cached %s.", path);
+		return 1;
+	}
+
 	if (!(path_copy = dm_pool_strdup(_cache.mem, path))) {
 		log_error("Failed to duplicate path string.");
 		return 0;