diff mbox series

[v3] selftests: cgroup: fix test_kmem_basic less than error

Message ID 7d6gcuyzdjcice6qbphrmpmv5skr5jtglg375unnjxqhstvhxc@qkn6dw6bao6v
State New
Headers
Series [v3] selftests: cgroup: fix test_kmem_basic less than error |

Commit Message

Lucas Karpinski Aug. 4, 2023, 7:35 p.m. UTC 
  test_kmem_basic creates 100,000 negative dentries, with each one mapping
to a slab object. After memory.high is set, these are reclaimed through
the shrink_slab function call which reclaims all 100,000 entries. The
test passes the majority of the time because when slab1 or current is
calculated, it is often above 0, however, 0 is also an acceptable value.

Signed-off-by: Lucas Karpinski <lkarpins@redhat.com>
---
In the previous patch, I missed a change to the variable 'current' even
after some testing as the issue was so sporadic. Current takes the slab
size into account and can also face the same issue where it fails since
the reported value is 0, which is an acceptable value.

Drop: b4abfc19 in mm-unstable
V2: https://lore.kernel.org/all/ix6vzgjqay2x7bskle7pypoint4nj66fwq7odvd5hektatvp2l@kukoifnfj3dr/

 tools/testing/selftests/cgroup/test_kmem.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/tools/testing/selftests/cgroup/test_kmem.c b/tools/testing/selftests/cgroup/test_kmem.c
index 1b2cec9d18a4..ed2e50bb1e76 100644
--- a/tools/testing/selftests/cgroup/test_kmem.c
+++ b/tools/testing/selftests/cgroup/test_kmem.c
@@ -75,11 +75,11 @@  static int test_kmem_basic(const char *root)
 	sleep(1);
 
 	slab1 = cg_read_key_long(cg, "memory.stat", "slab ");
-	if (slab1 <= 0)
+	if (slab1 < 0)
 		goto cleanup;
 
 	current = cg_read_long(cg, "memory.current");
-	if (current <= 0)
+	if (current < 0)
 		goto cleanup;
 
 	if (slab1 < slab0 / 2 && current < slab0 / 2)