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[03/62] radix tree test suite: Check reclaim bit

Message ID 20171122210739.29916-4-willy@infradead.org (mailing list archive)
State New, archived
Headers show

Commit Message

Matthew Wilcox Nov. 22, 2017, 9:06 p.m. UTC 
From: Matthew Wilcox <mawilcox@microsoft.com>

In order to test the memory allocation failure paths, the radix tree
test suite fails allocations if __GFP_NOWARN is set.  That happens to work
for the radix tree implementation, but the semantics we really want are
that we want to fail allocations which are not GFP_KERNEL.  Do this
by failing allocations which don't have the DIRECT_RECLAIM bit set.

Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
---
 tools/testing/radix-tree/linux.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox

Patch

diff --git a/tools/testing/radix-tree/linux.c b/tools/testing/radix-tree/linux.c
index 6903ccf35595..f7f3caed3650 100644
--- a/tools/testing/radix-tree/linux.c
+++ b/tools/testing/radix-tree/linux.c
@@ -29,7 +29,7 @@  void *kmem_cache_alloc(struct kmem_cache *cachep, int flags)
 {
 	struct radix_tree_node *node;
 
-	if (flags & __GFP_NOWARN)
+	if (!(flags & __GFP_DIRECT_RECLAIM))
 		return NULL;
 
 	pthread_mutex_lock(&cachep->lock);