4 files changed, 38 insertions, 33 deletions

diff --git a/fs/ocfs2/cluster/nodemanager.c b/fs/ocfs2/cluster/nodemanager.c
index e1fceb8..d11753c 100644
--- a/fs/ocfs2/cluster/nodemanager.c
+++ b/fs/ocfs2/cluster/nodemanager.c
@@ -152,14 +152,16 @@ static struct o2nm_node *o2nm_node_ip_tree_lookup(struct o2nm_cluster *cluster,
 	struct o2nm_node *node, *ret = NULL;
 
 	while (*p) {
+		int cmp;
+
 		parent = *p;
 		node = rb_entry(parent, struct o2nm_node, nd_ip_node);
 
-		if (memcmp(&ip_needle, &node->nd_ipv4_address,
-		           sizeof(ip_needle)) < 0)
+		cmp = memcmp(&ip_needle, &node->nd_ipv4_address,
+				sizeof(ip_needle));
+		if (cmp < 0)
 			p = &(*p)->rb_left;
-		else if (memcmp(&ip_needle, &node->nd_ipv4_address,
-			        sizeof(ip_needle)) > 0)
+		else if (cmp > 0)
 			p = &(*p)->rb_right;
 		else {
 			ret = node;
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index d9ba0a9..1be74c4 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -30,6 +30,7 @@
 #include <linux/highmem.h>
 #include <linux/pagemap.h>
 #include <linux/uio.h>
+#include <linux/sched.h>
 
 #define MLOG_MASK_PREFIX ML_INODE
 #include <cluster/masklog.h>
@@ -691,6 +692,12 @@ static int ocfs2_zero_extend(struct inode *inode,
 		}
 
 		start_off += sb->s_blocksize;
+
+		/*
+		 * Very large extends have the potential to lock up
+		 * the cpu for extended periods of time.
+		 */
+		cond_resched();
 	}
 
 out:
@@ -728,31 +735,36 @@ static int ocfs2_extend_file(struct inode *inode,
 	clusters_to_add = ocfs2_clusters_for_bytes(inode->i_sb, new_i_size) - 
 		OCFS2_I(inode)->ip_clusters;
 
-	if (clusters_to_add) {
-		/* 
-		 * protect the pages that ocfs2_zero_extend is going to
-		 * be pulling into the page cache.. we do this before the
-		 * metadata extend so that we don't get into the situation
-		 * where we've extended the metadata but can't get the data
-		 * lock to zero.
-		 */
-		ret = ocfs2_data_lock(inode, 1);
-		if (ret < 0) {
-			mlog_errno(ret);
-			goto out;
-		}
+	/* 
+	 * protect the pages that ocfs2_zero_extend is going to be
+	 * pulling into the page cache.. we do this before the
+	 * metadata extend so that we don't get into the situation
+	 * where we've extended the metadata but can't get the data
+	 * lock to zero.
+	 */
+	ret = ocfs2_data_lock(inode, 1);
+	if (ret < 0) {
+		mlog_errno(ret);
+		goto out;
+	}
 
+	if (clusters_to_add) {
 		ret = ocfs2_extend_allocation(inode, clusters_to_add);
 		if (ret < 0) {
 			mlog_errno(ret);
 			goto out_unlock;
 		}
+	}
 
-		ret = ocfs2_zero_extend(inode, (u64)new_i_size - tail_to_skip);
-		if (ret < 0) {
-			mlog_errno(ret);
-			goto out_unlock;
-		}
+	/*
+	 * Call this even if we don't add any clusters to the tree. We
+	 * still need to zero the area between the old i_size and the
+	 * new i_size.
+	 */
+	ret = ocfs2_zero_extend(inode, (u64)new_i_size - tail_to_skip);
+	if (ret < 0) {
+		mlog_errno(ret);
+		goto out_unlock;
 	}
 
 	if (!tail_to_skip) {
@@ -764,8 +776,7 @@ static int ocfs2_extend_file(struct inode *inode,
 	}
 
 out_unlock:
-	if (clusters_to_add) /* this is the only case in which we lock */
-		ocfs2_data_unlock(inode, 1);
+	ocfs2_data_unlock(inode, 1);
 
 out:
 	return ret;
diff --git a/fs/ocfs2/namei.c b/fs/ocfs2/namei.c
index 259155f..a57b751 100644
--- a/fs/ocfs2/namei.c
+++ b/fs/ocfs2/namei.c
@@ -1085,14 +1085,6 @@ static int ocfs2_rename(struct inode *old_dir,
 			BUG();
 	}
 
-	if (atomic_read(&old_dentry->d_count) > 2) {
-		shrink_dcache_parent(old_dentry);
-		if (atomic_read(&old_dentry->d_count) > 2) {
-			status = -EBUSY;
-			goto bail;
-		}
-	}
-
 	/* Assume a directory heirarchy thusly:
 	 * a/b/c
 	 * a/d
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index 4c29cd7..76b46eb 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -339,7 +339,7 @@ static unsigned long long ocfs2_max_file_offset(unsigned int blockshift)
 
 #if BITS_PER_LONG == 32
 # if defined(CONFIG_LBD)
-	BUG_ON(sizeof(sector_t) != 8);
+	BUILD_BUG_ON(sizeof(sector_t) != 8);
 	pagefactor = PAGE_CACHE_SIZE;
 	bitshift = BITS_PER_LONG;
 # else