cutils: iosched_policy: Access BFQIO cgroup in /dev/bfqio

AOSP doesn't mount cgroups in /sys/fs/cgroup, but in /dev/. Follow what AOSP does. Change-Id: I40d2241e3e5c41612d3a54d22981d3250f8b1ed6
G3-aosp-N · Mar 2, 2017 · e56c7eb · e56c7eb
1 parent 71ec85d
commit e56c7eb
Showing 1 changed file with 4 additions and 4 deletions.
diff --git a/libcutils/iosched_policy.c b/libcutils/iosched_policy.c
@@ -57,8 +57,8 @@ int android_get_ioprio(int pid __android_unused, IoSchedClass *clazz, int *iopri
 }
 
 static void __initialize_rtio(void) {
-    if (!access("/sys/fs/cgroup/bfqio/tasks", W_OK) ||
-        !access("/sys/fs/cgroup/bfqio/rt-display/tasks", W_OK)) {
+    if (!access("/dev/bfqio/tasks", W_OK) ||
+        !access("/dev/bfqio/rt-display/tasks", W_OK)) {
         __rtio_cgroup_supported = 1;
     } else {
         __rtio_cgroup_supported = 0;
@@ -74,9 +74,9 @@ int android_set_rt_ioprio(int tid, int rt) {
     }
 
     if (rt) {
-        fd = open("/sys/fs/cgroup/bfqio/rt-display/tasks", O_WRONLY | O_CLOEXEC);
+        fd = open("/dev/bfqio/rt-display/tasks", O_WRONLY | O_CLOEXEC);
     } else {
-        fd = open("/sys/fs/cgroup/bfqio/tasks", O_WRONLY | O_CLOEXEC);
+        fd = open("/dev/bfqio/tasks", O_WRONLY | O_CLOEXEC);
     }
 
     if (fd < 0) {