releases/4.9.147/lib-rbtree-test-lower-default-params.patch

From f99b19636a29b908b844a254f20d83783cb8cc44 Mon Sep 17 00:00:00 2001
From: Davidlohr Bueso <dave@stgolabs.net>
Date: Fri, 17 Nov 2017 15:28:27 -0800
Subject: lib/rbtree-test: lower default params

[ Upstream commit 0b548e33e6cb2bff240fdaf1783783be15c29080 ]

Fengguang reported soft lockups while running the rbtree and interval
tree test modules.  The logic for these tests all occur in init phase,
and we currently are pounding with the default values for number of
nodes and number of iterations of each test.  Reduce the latter by two
orders of magnitude.  This does not influence the value of the tests in
that one thousand times by default is enough to get the picture.

Link: http://lkml.kernel.org/r/20171109161715.xai2dtwqw2frhkcm@linux-n805
Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 lib/interval_tree_test.c | 4 ++--
 lib/rbtree_test.c        | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/interval_tree_test.c b/lib/interval_tree_test.c
index 409383463879..bababcf7ffdd 100644
--- a/lib/interval_tree_test.c
+++ b/lib/interval_tree_test.c
@@ -11,10 +11,10 @@
 	MODULE_PARM_DESC(name, msg);
 
 __param(int, nnodes, 100, "Number of nodes in the interval tree");
-__param(int, perf_loops, 100000, "Number of iterations modifying the tree");
+__param(int, perf_loops, 1000, "Number of iterations modifying the tree");
 
 __param(int, nsearches, 100, "Number of searches to the interval tree");
-__param(int, search_loops, 10000, "Number of iterations searching the tree");
+__param(int, search_loops, 1000, "Number of iterations searching the tree");
 __param(bool, search_all, false, "Searches will iterate all nodes in the tree");
 
 
diff --git a/lib/rbtree_test.c b/lib/rbtree_test.c
index e83331aa1b7f..afedd3770562 100644
--- a/lib/rbtree_test.c
+++ b/lib/rbtree_test.c
@@ -11,7 +11,7 @@
 	MODULE_PARM_DESC(name, msg);
 
 __param(int, nnodes, 100, "Number of nodes in the rb-tree");
-__param(int, perf_loops, 100000, "Number of iterations modifying the rb-tree");
+__param(int, perf_loops, 1000, "Number of iterations modifying the rb-tree");
 __param(int, check_loops, 100, "Number of iterations modifying and verifying the rb-tree");
 
 struct test_node {
-- 
2.19.1