From: Andrea Arcangeli <aarcange@redhat.com>
Date: Thu, 13 Jan 2011 23:46:29 +0000 (-0800)
Subject: thp: fix bad_page to show the real reason the page is bad
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=4e9f64c42d0ba5eb0c78569435ada4c224332ce4;p=deliverable%2Flinux.git

thp: fix bad_page to show the real reason the page is bad

page_count shows the count of the head page, but the actual check is done
on the tail page, so show what is really being checked.

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Acked-by: Rik van Riel <riel@redhat.com>
Acked-by: Mel Gorman <mel@csn.ul.ie>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index c18d1f7cff84..2a67c3bd403a 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -5618,7 +5618,7 @@ void dump_page(struct page *page)
 {
 	printk(KERN_ALERT
 	       "page:%p count:%d mapcount:%d mapping:%p index:%#lx\n",
-		page, page_count(page), page_mapcount(page),
+		page, atomic_read(&page->_count), page_mapcount(page),
 		page->mapping, page->index);
 	dump_page_flags(page->flags);
 }