mm: hugetlb_vmemmap: introduce the name HVO

[people/ms/linux.git] / Documentation / admin-guide / kernel-parameters.txt

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index bab2b0bf5988dfc8dfce798f6ea3086e82eed75e..8c06271835b03da46e8d57ce665d03420e1e0af5 100644 (file)
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -1731,12 +1731,13 @@
        hugetlb_free_vmemmap=
                        [KNL] Reguires CONFIG_HUGETLB_PAGE_OPTIMIZE_VMEMMAP
                        enabled.
+                       Control if HugeTLB Vmemmap Optimization (HVO) is enabled.
                        Allows heavy hugetlb users to free up some more
                        memory (7 * PAGE_SIZE for each 2MB hugetlb page).
-                       Format: { [oO][Nn]/Y/y/1 | [oO][Ff]/N/n/0 (default) }
+                       Format: { on | off (default) }
 
-                       [oO][Nn]/Y/y/1: enable the feature
-                       [oO][Ff]/N/n/0: disable the feature
+                       on: enable HVO
+                       off: disable HVO
 
                        Built with CONFIG_HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_ON=y,
                        the default is on.