From fcaff5d7cc2cd4d6fecbf641b8a3ce4f09490e3d Mon Sep 17 00:00:00 2001
From: Andrew Perepechko <andrew.perepechko@seagate.com>
Date: Wed, 28 Jun 2017 12:24:26 +0300
Subject: [PATCH] LU-9716 osc: osc_extent_tree_dump0() implementation is
 suboptimal

Avoid looping in osc_extent_tree_dump() if debugging is disabled.
This helps us save some cpu ticks.

Lustre-change: https://review.whamcloud.com/27866
Lustre-commit: 97115ccd159e4503ca16cb7f68ee7479c780f1cf

Change-Id: I492429d8a6de79f67b5923895ffa58b7fe3a100d
Seagate-bug-id: MRP-4469
Signed-off-by: Andrew Perepechko <andrew.perepechko@seagate.com>
Reviewed-by: Alexander Boyko <alexander.boyko@seagate.com>
Reviewed-by: Alexander Zarochentsev <alexander.zarochentsev@seagate.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Signed-off-by: Minh Diep <minh.diep@intel.com>
Reviewed-on: https://review.whamcloud.com/28235
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Mike Pershin <mike.pershin@intel.com>
Reviewed-by: John L. Hammond <john.hammond@intel.com>
---
 lustre/osc/osc_cache.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lustre/osc/osc_cache.c b/lustre/osc/osc_cache.c
index 43c4b6f..3e9e29e 100644
--- a/lustre/osc/osc_cache.c
+++ b/lustre/osc/osc_cache.c
@@ -1226,6 +1226,9 @@ static void osc_extent_tree_dump0(int level, struct osc_object *obj,
 	struct osc_extent *ext;
 	int cnt;
 
+	if (!cfs_cdebug_show(level, DEBUG_SUBSYSTEM))
+		return;
+
 	CDEBUG(level, "Dump object %p extents at %s:%d, mppr: %u.\n",
 	       obj, func, line, osc_cli(obj)->cl_max_pages_per_rpc);
 
-- 
1.8.3.1