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authorMatthew Wilcox <willy@infradead.org>2018-09-08 12:09:52 -0400
committerMatthew Wilcox <willy@infradead.org>2018-10-21 10:46:46 -0400
commit93eb07f72c8d86f8fe5e90907df1cc037f6ffbb7 (patch)
tree1770476c4ad43d7f1aeb730cf09aeba22c65d6f7 /lib
parentd6427f8179b5dd65eb468c61fc8cc24657c336c9 (diff)
downloadlinux-93eb07f72c8d86f8fe5e90907df1cc037f6ffbb7.tar.gz
xarray: Move multiorder_shrink to kernel tests
Test this functionality inside the kernel as well as in userspace. Also remove insert_bug() as there's no comparable thing to test in the XArray code. Signed-off-by: Matthew Wilcox <willy@infradead.org>
Diffstat (limited to 'lib')
-rw-r--r--lib/test_xarray.c37
1 files changed, 37 insertions, 0 deletions
diff --git a/lib/test_xarray.c b/lib/test_xarray.c
index 38cab4ccb24e..ff94b54a926d 100644
--- a/lib/test_xarray.c
+++ b/lib/test_xarray.c
@@ -199,9 +199,25 @@ static noinline void check_xa_mark_1(struct xarray *xa, unsigned long index)
xa_store_order(xa, index, order, xa_mk_value(index),
GFP_KERNEL);
for (i = base; i < next; i++) {
+ XA_STATE(xas, xa, i);
+ unsigned int seen = 0;
+ void *entry;
+
XA_BUG_ON(xa, !xa_get_mark(xa, i, XA_MARK_0));
XA_BUG_ON(xa, !xa_get_mark(xa, i, XA_MARK_1));
XA_BUG_ON(xa, xa_get_mark(xa, i, XA_MARK_2));
+
+ /* We should see two elements in the array */
+ xas_for_each(&xas, entry, ULONG_MAX)
+ seen++;
+ XA_BUG_ON(xa, seen != 2);
+
+ /* One of which is marked */
+ xas_set(&xas, 0);
+ seen = 0;
+ xas_for_each_marked(&xas, entry, ULONG_MAX, XA_MARK_0)
+ seen++;
+ XA_BUG_ON(xa, seen != 1);
}
XA_BUG_ON(xa, xa_get_mark(xa, next, XA_MARK_0));
XA_BUG_ON(xa, xa_get_mark(xa, next, XA_MARK_1));
@@ -265,6 +281,8 @@ static noinline void check_xa_shrink(struct xarray *xa)
{
XA_STATE(xas, xa, 1);
struct xa_node *node;
+ unsigned int order;
+ unsigned int max_order = IS_ENABLED(CONFIG_XARRAY_MULTI) ? 15 : 1;
XA_BUG_ON(xa, !xa_empty(xa));
XA_BUG_ON(xa, xa_store_index(xa, 0, GFP_KERNEL) != NULL);
@@ -287,6 +305,25 @@ static noinline void check_xa_shrink(struct xarray *xa)
XA_BUG_ON(xa, xa_load(xa, 0) != xa_mk_value(0));
xa_erase_index(xa, 0);
XA_BUG_ON(xa, !xa_empty(xa));
+
+ for (order = 0; order < max_order; order++) {
+ unsigned long max = (1UL << order) - 1;
+ xa_store_order(xa, 0, order, xa_mk_value(0), GFP_KERNEL);
+ XA_BUG_ON(xa, xa_load(xa, max) != xa_mk_value(0));
+ XA_BUG_ON(xa, xa_load(xa, max + 1) != NULL);
+ rcu_read_lock();
+ node = xa_head(xa);
+ rcu_read_unlock();
+ XA_BUG_ON(xa, xa_store_index(xa, ULONG_MAX, GFP_KERNEL) !=
+ NULL);
+ rcu_read_lock();
+ XA_BUG_ON(xa, xa_head(xa) == node);
+ rcu_read_unlock();
+ XA_BUG_ON(xa, xa_load(xa, max + 1) != NULL);
+ xa_erase_index(xa, ULONG_MAX);
+ XA_BUG_ON(xa, xa->xa_head != node);
+ xa_erase_index(xa, 0);
+ }
}
static noinline void check_cmpxchg(struct xarray *xa)