On 2/12/26 12:23 AM, Hui Zhu wrote:
From: Hui Zhu <[email protected]>
When cgroup.memory=nokmem is set in kernel command line, kmem
accounting is disabled and the test_kmem subtest will fail.
Add a check to skip this test when the parameter is present.
Signed-off-by: Hui Zhu <[email protected]>
---
.../bpf/prog_tests/cgroup_iter_memcg.c | 28 +++++++++++++++++++
1 file changed, 28 insertions(+)
diff --git a/tools/testing/selftests/bpf/prog_tests/cgroup_iter_memcg.c
b/tools/testing/selftests/bpf/prog_tests/cgroup_iter_memcg.c
index 13b299512429..203e6b091a21 100644
--- a/tools/testing/selftests/bpf/prog_tests/cgroup_iter_memcg.c
+++ b/tools/testing/selftests/bpf/prog_tests/cgroup_iter_memcg.c
@@ -134,11 +134,39 @@ static void test_shmem(struct bpf_link *link, struct
memcg_query *memcg_query)
shm_unlink("/tmp_shmem");
}
+static bool cmdline_has(const char *arg)
+{
+ char cmdline[4096];
+ int fd;
+ ssize_t len;
+ bool ret = false;
+
+ fd = open("/proc/cmdline", O_RDONLY);
+ if (fd < 0)
+ return false;
+
+ len = read(fd, cmdline, sizeof(cmdline) - 1);
+ close(fd);
+ if (len < 0)
+ return false;
+
+ cmdline[len] = '\0';
+ if (strstr(cmdline, arg))
+ ret = true;
+
+ return ret;
+}
+
#define NR_PIPES 64
static void test_kmem(struct bpf_link *link, struct memcg_query *memcg_query)
{
int fds[NR_PIPES][2], i;
+ if (cmdline_has("cgroup.memory=nokmem")) {
+ test__skip();
+ return;
+ }
Instead of just skipping what if we proceed and then confirm we get a
zero value after the allocations?
