1 files changed, 9 insertions, 0 deletions
diff --git a/libcutils/sched_policy.c b/libcutils/sched_policy.c
index 83222f4..8c26cdd 100644
--- a/libcutils/sched_policy.c
+++ b/libcutils/sched_policy.c
@@ -61,6 +61,7 @@ static int bg_cgroup_fd = -1;
 static int fg_cgroup_fd = -1;
 
 // File descriptors open to /dev/cpuset/../tasks, setup by initialize, or -1 on error
+static int system_bg_cpuset_fd = -1;
 static int bg_cpuset_fd = -1;
 static int fg_cpuset_fd = -1;
 
@@ -126,6 +127,11 @@ static void __initialize(void) {
         fg_cpuset_fd = open(filename, O_WRONLY | O_CLOEXEC);
         filename = "/dev/cpuset/background/tasks";
         bg_cpuset_fd = open(filename, O_WRONLY | O_CLOEXEC);
+        filename = "/dev/cpuset/system-background/tasks";
+        system_bg_cpuset_fd = open(filename, O_WRONLY | O_CLOEXEC);
+        if (system_bg_cpuset_fd < 0) {
+            SLOGE("initialize of system-bg failed: %s\n", strerror(errno));
+        }
     }
 #endif
 
@@ -260,6 +266,9 @@ int set_cpuset_policy(int tid, SchedPolicy policy)
     case SP_AUDIO_SYS:
         fd = fg_cpuset_fd;
         break;
+    case SP_SYSTEM:
+        fd = system_bg_cpuset_fd;
+        break;
     default:
         fd = -1;
         break;