1 files changed, 15 insertions, 0 deletions

diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index da88f167af78..02df7b408a26 100644
--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -41,6 +41,7 @@
 #include "xfs_fsops.h"
 #include "xfs_trace.h"
 #include "xfs_icache.h"
+#include "xfs_dinode.h"
 
 
 #ifdef HAVE_PERCPU_SB
@@ -718,8 +719,22 @@ xfs_mountfs(
          * Set the inode cluster size.
          * This may still be overridden by the file system
          * block size if it is larger than the chosen cluster size.
+         *
+         * For v5 filesystems, scale the cluster size with the inode size to
+         * keep a constant ratio of inode per cluster buffer, but only if mkfs
+         * has set the inode alignment value appropriately for larger cluster
+         * sizes.
          */
         mp->m_inode_cluster_size = XFS_INODE_BIG_CLUSTER_SIZE;
+        if (xfs_sb_version_hascrc(&mp->m_sb)) {
+                int     new_size = mp->m_inode_cluster_size;
+
+                new_size *= mp->m_sb.sb_inodesize / XFS_DINODE_MIN_SIZE;
+                if (mp->m_sb.sb_inoalignmt >= XFS_B_TO_FSBT(mp, new_size))
+                        mp->m_inode_cluster_size = new_size;
+                xfs_info(mp, "Using inode cluster size of %d bytes",
+                         mp->m_inode_cluster_size);
+        }
 
         /*
          * Set inode alignment fields