[PATCH 3/7] - pick single default inode cluster

Eric Sandeen
2007-07-20T04:12:15Z

Remove scaling of inode "clusters" based on machine memory;
small cluster cut-point was an unrealistic 32MB and was
probably never tested.

Removes another user of xfs_physmem.

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

Index: linux/fs/xfs/xfs_ialloc.h
===================================================================
--- linux.orig/fs/xfs/xfs_ialloc.h
+++ linux/fs/xfs/xfs_ialloc.h
@@ -30,14 +30,9 @@ struct xfs_trans;
#define XFS_IALLOC_BLOCKS(mp) (mp)->m_ialloc_blks

/*
- * For small block file systems, move inodes in clusters of this size.
- * When we don't have a lot of memory, however, we go a bit smaller
- * to reduce the number of AGI and ialloc btree blocks we need to keep
- * around for xfs_dilocate(). We choose which one to use in
- * xfs_mount_int().
+ * Move inodes in clusters of this size.
*/
#define XFS_INODE_BIG_CLUSTER_SIZE 8192
-#define XFS_INODE_SMALL_CLUSTER_SIZE 4096
#define XFS_INODE_CLUSTER_SIZE(mp) (mp)->m_inode_cluster_size

/*
Index: linux/fs/xfs/xfs_mount.c
===================================================================
--- linux.orig/fs/xfs/xfs_mount.c
+++ linux/fs/xfs/xfs_mount.c
@@ -885,15 +885,12 @@ xfs_mountfs(
mp->m_writeio_blocks = 1 << (mp->m_writeio_log - sbp->sb_blocklog);

/*
- * Set the inode cluster size based on the physical memory
- * size. This may still be overridden by the file system
+ * 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.
*/
- if (xfs_physmem <= btoc(32 * 1024 * 1024)) { /* <= 32 MB */
- mp->m_inode_cluster_size = XFS_INODE_SMALL_CLUSTER_SIZE;
- } else {
- mp->m_inode_cluster_size = XFS_INODE_BIG_CLUSTER_SIZE;
- }
+ mp->m_inode_cluster_size = XFS_INODE_BIG_CLUSTER_SIZE;
+
/*
* Set whether we're using inode alignment.
*/