diff --git a/fs/xfs/xfs_vfsops.c b/fs/xfs/xfs_vfsops.c
index c343fde..11f5ea2 100644
--- a/fs/xfs/xfs_vfsops.c
+++ b/fs/xfs/xfs_vfsops.c
@@ -51,6 +51,8 @@
 #include "xfs_acl.h"
 #include "xfs_attr.h"
 #include "xfs_clnt.h"
+#include "xfs_mru_cache.h"
+#include "xfs_filestream.h"
 #include "xfs_fsops.h"
 
 STATIC int	xfs_sync(bhv_desc_t *, int, cred_t *);
@@ -81,6 +83,8 @@
 	xfs_dabuf_zone = kmem_zone_init(sizeof(xfs_dabuf_t), "xfs_dabuf");
 	xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork");
 	xfs_acl_zone_init(xfs_acl_zone, "xfs_acl");
+	xfs_mru_cache_init();
+	xfs_filestream_init();
 
 	/*
 	 * The size of the zone allocated buf log item is the maximum
@@ -164,6 +168,8 @@
 	xfs_cleanup_procfs();
 	xfs_sysctl_unregister();
 	xfs_refcache_destroy();
+	xfs_filestream_uninit();
+	xfs_mru_cache_uninit();
 	xfs_acl_zone_destroy(xfs_acl_zone);
 
 #ifdef XFS_DIR2_TRACE
@@ -320,6 +326,9 @@
 	else
 		mp->m_flags &= ~XFS_MOUNT_BARRIER;
 
+	if (ap->flags2 & XFSMNT2_FILESTREAMS)
+		mp->m_flags |= XFS_MOUNT_FILESTREAMS;
+
 	return 0;
 }
 
@@ -518,6 +527,9 @@
 	if (mp->m_flags & XFS_MOUNT_BARRIER)
 		xfs_mountfs_check_barriers(mp);
 
+	if ((error = xfs_filestream_mount(mp)))
+		goto error2;
+
 	error = XFS_IOINIT(vfsp, args, flags);
 	if (error)
 		goto error2;
@@ -575,6 +587,13 @@
 	 */
 	xfs_refcache_purge_mp(mp);
 
+	/*
+	 * Blow away any referenced inode in the filestreams cache.
+	 * This can and will cause log traffic as inodes go inactive
+	 * here.
+	 */
+	xfs_filestream_unmount(mp);
+
 	XFS_bflush(mp->m_ddev_targp);
 	error = xfs_unmount_flush(mp, 0);
 	if (error)
@@ -694,6 +713,7 @@
 			mp->m_flags &= ~XFS_MOUNT_BARRIER;
 		}
 	} else if (!(vfsp->vfs_flag & VFS_RDONLY)) {	/* rw -> ro */
+		xfs_filestream_flush(mp);
 		bhv_vfs_sync(vfsp, SYNC_DATA_QUIESCE, NULL);
 		xfs_attr_quiesce(mp);
 		vfsp->vfs_flag |= VFS_RDONLY;
@@ -909,6 +929,9 @@
 {
 	xfs_mount_t	*mp = XFS_BHVTOM(bdp);
 
+	if (flags & SYNC_IOWAIT)
+		xfs_filestream_flush(mp);
+
 	return xfs_syncsub(mp, flags, NULL);
 }
 
@@ -1659,6 +1682,7 @@
 					 * in stat(). */
 #define MNTOPT_ATTR2	"attr2"		/* do use attr2 attribute format */
 #define MNTOPT_NOATTR2	"noattr2"	/* do not use attr2 attribute format */
+#define MNTOPT_FILESTREAM  "filestreams" /* use filestreams allocator */
 
 STATIC unsigned long
 suffix_strtoul(char *s, char **endp, unsigned int base)
@@ -1845,6 +1869,8 @@
 			args->flags |= XFSMNT_ATTR2;
 		} else if (!strcmp(this_char, MNTOPT_NOATTR2)) {
 			args->flags &= ~XFSMNT_ATTR2;
+		} else if (!strcmp(this_char, MNTOPT_FILESTREAM)) {
+			args->flags2 |= XFSMNT2_FILESTREAMS;
 		} else if (!strcmp(this_char, "osyncisdsync")) {
 			/* no-op, this is now the default */
 			cmn_err(CE_WARN,