1 files changed, 5 insertions, 0 deletions

diff --git a/Documentation/x86_64/boot-options.txt b/Documentation/x86_64/boot-options.txt
index 1921353259ae..f2cd6ef53ff3 100644
--- a/Documentation/x86_64/boot-options.txt
+++ b/Documentation/x86_64/boot-options.txt
@@ -151,6 +151,11 @@ NUMA
 
   numa=fake=X   Fake X nodes and ignore NUMA setup of the actual machine.
 
+  numa=hotadd=percent
+                Only allow hotadd memory to preallocate page structures upto
+                percent of already available memory.
+                numa=hotadd=0 will disable hotadd memory.
+
 ACPI
 
   acpi=off      Don't enable ACPI