diff --git a/Documentation/cpusets.txt b/Documentation/cpusets.txt
index 894b844153ea6dbf80ff426d1a6d49bb8c9c1f96..1f5a924d1e56430bc3c8a0a6bb74e7524fab1670 100644
--- a/Documentation/cpusets.txt
+++ b/Documentation/cpusets.txt
@@ -546,6 +546,9 @@ otherwise initial value -1 that indicates the cpuset has no request.
  ( 4  : search nodes in a chunk of node [on NUMA system] )
  ( 5  : search system wide [on NUMA system] )
 
+The system default is architecture dependent.  The system default
+can be changed using the relax_domain_level= boot parameter.
+
 This file is per-cpuset and affect the sched domain where the cpuset
 belongs to.  Therefore if the flag 'sched_load_balance' of a cpuset
 is disabled, then 'sched_relax_domain_level' have no effect since
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 85c6f574e267d56893dad42ca59a366dbbb273ee..b52f47d588b40fea417bf4bca4ffdbfef4d02152 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1679,6 +1679,10 @@ and is between 256 and 4096 characters. It is defined in the file
 			Format: <reboot_mode>[,<reboot_mode2>[,...]]
 			See arch/*/kernel/reboot.c or arch/*/kernel/process.c			
 
+	relax_domain_level=
+			[KNL, SMP] Set scheduler's default relax_domain_level.
+			See Documentation/cpusets.txt.
+
 	reserve=	[KNL,BUGS] Force the kernel to ignore some iomem area
 
 	reservetop=	[X86-32]