1 files changed, 6 insertions, 2 deletions

diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c
index 5d2259468d3c..4119379f80ff 100644
--- a/arch/x86/mm/pageattr.c
+++ b/arch/x86/mm/pageattr.c
@@ -870,8 +870,12 @@ void kernel_map_pages(struct page *page, int numpages, int enable)
                 return;
 
         /*
-         * The return value is ignored - the calls cannot fail,
-         * large pages are disabled at boot time:
+         * The return value is ignored as the calls cannot fail.
+         * Large pages are kept enabled at boot time, and are
+         * split up quickly with DEBUG_PAGEALLOC. If a splitup
+         * fails here (due to temporary memory shortage) no damage
+         * is done because we just keep the largepage intact up
+         * to the next attempt when it will likely be split up:
          */
         if (enable)
                 __set_pages_p(page, numpages);