1 files changed, 6 insertions, 0 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 08def8deb5f5..ecad946920d1 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1882,6 +1882,12 @@ and is between 256 and 4096 characters. It is defined in the file
                         Format: { 0 | 1 }
                         See arch/parisc/kernel/pdc_chassis.c
 
+        percpu_alloc=   [X86] Select which percpu first chunk allocator to use.
+                        Allowed values are one of "lpage", "embed" and "4k".
+                        See comments in arch/x86/kernel/setup_percpu.c for
+                        details on each allocator.  This parameter is primarily
+                        for debugging and performance comparison.
+
         pf.             [PARIDE]
                         See Documentation/blockdev/paride.txt.