From cfa418c952562035fe179c34b0acab73df8fd551 Mon Sep 17 00:00:00 2001
From: Jan Kara <jack@suse.cz>
Date: Thu, 23 Jun 2011 22:51:47 +0200
Subject: [PATCH] --- yaml --- r: 276167 b: refs/heads/master c:
 c7e25e6e0b0486492c5faaf6312b37413642c48e h: refs/heads/master i:   276165:
 a89748c28a0908554de22b95fd944a566e832658   276163:
 7d2ce3595eec9b42755367cfbdb09de500f3d413   276159:
 c9355d9efc64563789a23ed503cc237b80bebbfa v: v3

---
 [refs]                | 2 +-
 trunk/fs/ocfs2/aops.c | 8 ++++++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index 4f4d250aa661..bf24142ffc6d 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: a11f7e63c59810a81494d4c4b028af707d4c7ca4
+refs/heads/master: c7e25e6e0b0486492c5faaf6312b37413642c48e
diff --git a/trunk/fs/ocfs2/aops.c b/trunk/fs/ocfs2/aops.c
index 4c1ec8f2d8c1..ba3ca1e63b51 100644
--- a/trunk/fs/ocfs2/aops.c
+++ b/trunk/fs/ocfs2/aops.c
@@ -290,7 +290,15 @@ static int ocfs2_readpage(struct file *file, struct page *page)
 	}
 
 	if (down_read_trylock(&oi->ip_alloc_sem) == 0) {
+		/*
+		 * Unlock the page and cycle ip_alloc_sem so that we don't
+		 * busyloop waiting for ip_alloc_sem to unlock
+		 */
 		ret = AOP_TRUNCATED_PAGE;
+		unlock_page(page);
+		unlock = 0;
+		down_read(&oi->ip_alloc_sem);
+		up_read(&oi->ip_alloc_sem);
 		goto out_inode_unlock;
 	}