linux-kernel - [PATCH 13/14] mm: pincer in truncate_inode_pages

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Date:	Sun, 5 Jun 2011 21:40:53 -0700 (PDT)
From:	Hugh Dickins <hughd@...gle.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: [PATCH 13/14] mm: pincer in truncate_inode_pages_range

truncate_inode_pages_range()'s final loop has a nice pincer property,
bringing start and end together, squeezing out the last pages.  But
the range handling missed out on that, just sliding up the range,
perhaps letting pages come in behind it.  Add one more test to give
it the same pincer effect.

Signed-off-by: Hugh Dickins <hughd@...gle.com>
---
 mm/truncate.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- linux.orig/mm/truncate.c	2011-06-05 19:25:13.112013371 -0700
+++ linux/mm/truncate.c	2011-06-05 19:27:12.244611885 -0700
@@ -269,7 +269,7 @@ void truncate_inode_pages_range(struct a
 			index = start;
 			continue;
 		}
-		if (pvec.pages[0]->index > end) {
+		if (index == start && pvec.pages[0]->index > end) {
 			pagevec_release(&pvec);
 			break;
 		}
--
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