Merge "Check for /dev/memcg/system/tasks before writing to it"

      }

      // Assign system_server to the correct memory cgroup.

      if (!WriteStringToFile(StringPrintf("%d", pid), "/dev/memcg/system/tasks")) {

      // Not all devices mount /dev/memcg so check for the file first

      // to avoid unnecessarily printing errors and denials in the logs.

      if (!access("/dev/memcg/system/tasks", F_OK) &&

                !WriteStringToFile(StringPrintf("%d", pid), "/dev/memcg/system/tasks")) {

        ALOGE("couldn't write %d to /dev/memcg/system/tasks", pid);

      }

  }