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authorDavid Chinner <dgc@sgi.com>2008-03-06 13:43:49 +1100
committerLachlan McIlroy <lachlan@redback.melbourne.sgi.com>2008-04-18 11:37:41 +1000
commitbad5584332e888ac40ca13584e8c114149ddb01e (patch)
treef66ff83686cd28967d8b9fc0a8b8d6411a081071 /fs/xfs/xfs_inode.h
parenta3f74ffb6d1448d9a8f482e593b80ec15f1695d4 (diff)
[XFS] Remove the xfs_icluster structure
Remove the xfs_icluster structure and replace with a radix tree lookup. We don't need to keep a list of inodes in each cluster around anymore as we can look them up quickly when we need to. The only time we need to do this now is during inode writeback. Factor the inode cluster writeback code out of xfs_iflush and convert it to use radix_tree_gang_lookup() instead of walking a list of inodes built when we first read in the inodes. This remove 3 pointers from each xfs_inode structure and the xfs_icluster structure per inode cluster. Hence we reduce the cache footprint of the xfs_inodes by between 5-10% depending on cluster sparseness. To be truly efficient we need a radix_tree_gang_lookup_range() call to stop searching once we are past the end of the cluster instead of trying to find a full cluster's worth of inodes. Before (ia64): $ cat /sys/slab/xfs_inode/object_size 536 After: $ cat /sys/slab/xfs_inode/object_size 512 SGI-PV: 977460 SGI-Modid: xfs-linux-melb:xfs-kern:30502a Signed-off-by: David Chinner <dgc@sgi.com> Signed-off-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_inode.h')
-rw-r--r--fs/xfs/xfs_inode.h16
1 files changed, 0 insertions, 16 deletions
diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h
index c3bfffca921..93c37697a72 100644
--- a/fs/xfs/xfs_inode.h
+++ b/fs/xfs/xfs_inode.h
@@ -133,19 +133,6 @@ typedef struct dm_attrs_s {
} dm_attrs_t;
/*
- * This is the xfs inode cluster structure. This structure is used by
- * xfs_iflush to find inodes that share a cluster and can be flushed to disk at
- * the same time.
- */
-typedef struct xfs_icluster {
- struct hlist_head icl_inodes; /* list of inodes on cluster */
- xfs_daddr_t icl_blkno; /* starting block number of
- * the cluster */
- struct xfs_buf *icl_buf; /* the inode buffer */
- spinlock_t icl_lock; /* inode list lock */
-} xfs_icluster_t;
-
-/*
* This is the xfs in-core inode structure.
* Most of the on-disk inode is embedded in the i_d field.
*
@@ -248,8 +235,6 @@ typedef struct xfs_inode {
unsigned int i_delayed_blks; /* count of delay alloc blks */
xfs_icdinode_t i_d; /* most of ondisk inode */
- xfs_icluster_t *i_cluster; /* cluster list header */
- struct hlist_node i_cnode; /* cluster link node */
xfs_fsize_t i_size; /* in-memory size */
xfs_fsize_t i_new_size; /* size when write completes */
@@ -594,7 +579,6 @@ void xfs_inobp_check(struct xfs_mount *, struct xfs_buf *);
#define xfs_inobp_check(mp, bp)
#endif /* DEBUG */
-extern struct kmem_zone *xfs_icluster_zone;
extern struct kmem_zone *xfs_ifork_zone;
extern struct kmem_zone *xfs_inode_zone;
extern struct kmem_zone *xfs_ili_zone;