From: Ingo Molnar <mingo@elte.hu>
Date: Wed, 13 Feb 2008 13:09:53 +0000 (+0100)
Subject: x86: cpa, fix out of date comment
X-Git-Tag: v2.6.25-rc2~9^2
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f8d8406bcb58ff70e97b71c35ff5be90c54fc3d0;p=linux-2.6

x86: cpa, fix out of date comment

Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c
index 5d2259468d..4119379f80 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);