check_resctrlfs_support() does the following 1. Checks if the platform supports resctrl file system or not by looking for resctrl in /proc/filesystems 2. Calls opendir() on default resctrl file system path (i.e. /sys/fs/resctrl) 3. Checks if resctrl file system is mounted or not by looking at /proc/mounts
Steps 2 and 3 will fail if the platform does not support resctrl file system. So, there is no need to check for them if step 1 fails.
Fix this by returning immediately if the platform does not support resctrl file system.
Fixes: ecdbb911f22d ("selftests/resctrl: Add MBM test") Signed-off-by: Fenghua Yu fenghua.yu@intel.com --- tools/testing/selftests/resctrl/resctrlfs.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/tools/testing/selftests/resctrl/resctrlfs.c b/tools/testing/selftests/resctrl/resctrlfs.c index 727e667e2cc9..e43ddebd1aa4 100644 --- a/tools/testing/selftests/resctrl/resctrlfs.c +++ b/tools/testing/selftests/resctrl/resctrlfs.c @@ -581,6 +581,9 @@ bool check_resctrlfs_support(void) printf("%sok kernel supports resctrl filesystem\n", ret ? "" : "not "); tests_run++;
+ if (!ret) + return ret; + dp = opendir(RESCTRL_PATH); printf("%sok resctrl mountpoint "%s" exists\n", dp ? "" : "not ", RESCTRL_PATH);