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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_vfsops.c
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_vfsops.c')
-rw-r--r--fs/xfs/xfs_vfsops.c5
1 files changed, 0 insertions, 5 deletions
diff --git a/fs/xfs/xfs_vfsops.c b/fs/xfs/xfs_vfsops.c
index 79bdfb3d6081..3ec27bf8531c 100644
--- a/fs/xfs/xfs_vfsops.c
+++ b/fs/xfs/xfs_vfsops.c
@@ -112,9 +112,6 @@ xfs_init(void)
xfs_ili_zone =
kmem_zone_init_flags(sizeof(xfs_inode_log_item_t), "xfs_ili",
KM_ZONE_SPREAD, NULL);
- xfs_icluster_zone =
- kmem_zone_init_flags(sizeof(xfs_icluster_t), "xfs_icluster",
- KM_ZONE_SPREAD, NULL);
/*
* Allocate global trace buffers.
@@ -152,7 +149,6 @@ xfs_cleanup(void)
extern kmem_zone_t *xfs_inode_zone;
extern kmem_zone_t *xfs_efd_zone;
extern kmem_zone_t *xfs_efi_zone;
- extern kmem_zone_t *xfs_icluster_zone;
xfs_cleanup_procfs();
xfs_sysctl_unregister();
@@ -187,7 +183,6 @@ xfs_cleanup(void)
kmem_zone_destroy(xfs_efi_zone);
kmem_zone_destroy(xfs_ifork_zone);
kmem_zone_destroy(xfs_ili_zone);
- kmem_zone_destroy(xfs_icluster_zone);
}
/*