4.14-stable review patch. If anyone has any objections, please let me know.
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From: Davidlohr Bueso dave@stgolabs.net
commit 0b548e33e6cb2bff240fdaf1783783be15c29080 upstream.
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 Cc: Guenter Roeck linux@roeck-us.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- lib/interval_tree_test.c | 4 ++-- lib/rbtree_test.c | 2 +- 2 files changed, 3 insertions(+), 3 deletions(-)
--- 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");
__param(uint, max_endpoint, ~0, "Largest value for the interval's endpoint"); --- 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 {