[PATCH, RFC] default to inode64 on 64-bit systems

[Eric Sandeen]

I'm tiring of telling people to use the inode64 mount option
when they are experiencing bad performance on large xfs 
filesystems...

32-bit userspace is still largely broken when it comes to still
using 32-bit stat calls, but on 64-bit systems this should be
safe.

The only problem here is moving the disk onto a 32-bit system, or using
32-bit apps.  But I think it's a small risk.

What do we think about the following?

Thanks,
-Eric

Signed-off-by: Eric Sandeen <sandeen at sandeen.net>
---

diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c
index a220d36..5d134fd 100644
--- a/fs/xfs/linux-2.6/xfs_super.c
+++ b/fs/xfs/linux-2.6/xfs_super.c
@@ -195,7 +195,9 @@ xfs_parseargs(
 	 */
 	mp->m_flags |= XFS_MOUNT_BARRIER;
 	mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
+#if BITS_PER_LONG == 32
 	mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
+#endif
 
 	/*
 	 * These can be overridden by the mount option parsing.