nohz: New option to default all CPUs in full dynticks range

[firefly-linux-kernel-4.4.55.git] / kernel / time / Kconfig

diff --git a/kernel/time/Kconfig b/kernel/time/Kconfig
index 358d601a4fec8881f3a4089f4fc051710b36c363..99c3f13dd478e2214972e93cec812fd0896bda79 100644 (file)
--- a/kernel/time/Kconfig
+++ b/kernel/time/Kconfig
@@ -128,6 +128,16 @@ config NO_HZ_FULL
 
 endchoice
 
+config NO_HZ_FULL_ALL
+       bool "Full dynticks system on all CPUs by default"
+       depends on NO_HZ_FULL
+       help
+         If the user doesn't pass the nohz_full boot option to
+        define the range of full dynticks CPUs, consider that all
+        CPUs in the system are full dynticks by default.
+        Note the boot CPU will still be kept outside the range to
+        handle the timekeeping duty.
+
 config NO_HZ
        bool "Old Idle dynticks config"
        depends on !ARCH_USES_GETTIMEOFFSET && GENERIC_CLOCKEVENTS