From e153aa7990a09a8a12860fc1f79304b02a6bc03f Mon Sep 17 00:00:00 2001
From: "Darrick J. Wong" <darrick.wong@oracle.com>
Date: Mon, 3 Oct 2016 09:11:49 -0700
Subject: xfs: set a default CoW extent size of 32 blocks

If the admin doesn't set a CoW extent size or a regular extent size
hint, default to creating CoW reservations 32 blocks long to reduce
fragmentation.

Signed-off-by: DarricK J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
 fs/xfs/xfs_inode.h | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'fs/xfs/xfs_inode.h')

diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h
index 6d63dc031127..f14c1de2549d 100644
--- a/fs/xfs/xfs_inode.h
+++ b/fs/xfs/xfs_inode.h
@@ -490,4 +490,7 @@ do { \
 
 extern struct kmem_zone	*xfs_inode_zone;
 
+/* The default CoW extent size hint. */
+#define XFS_DEFAULT_COWEXTSZ_HINT 32
+
 #endif	/* __XFS_INODE_H__ */
-- 
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