On Mon, 2018-11-12 at 14:12 -0600, Eric Sandeen wrote: > On 11/10/18 7:21 PM, Joe Perches wrote: > > Reduce total object size quite a bit (~32KB) and presumably > > improve performance at the same time. > > > > Total object size old vs new (x86-64 defconfig with xfs) > > > > text data bss dec hex filename > > - 959351 165573 632 1125556 112cb4 (TOTALS) (old) > > + 924683 165669 632 1090984 10a5a8 (TOTALS) (new) > > And what does it do to maximum stack excursions?
It seems to add a maximum of 40 bytes in xfs_reclaim_inodes_ag and xfs_readdir, but I didn't do more than visually scan checkstack output. Using scripts/checkstack.pl on defconfig x86-64 with xfs and cutting out absolute addresses diff -urN xfs_cs_old_2 xfs_cs_new_2 --- xfs_cs_old_2 2018-11-12 12:55:03.195282512 -0800 +++ xfs_cs_new_2 2018-11-12 12:55:09.219168923 -0800 @@ -1,18 +1,20 @@ xfs_ag_init_headers [vmlinux]: 464 xfs_ag_init_headers [vmlinux]: 464 -xfs_inode_ag_walk.isra.19 [vmlinux]: 416 -xfs_inode_ag_walk.isra.19 [vmlinux]: 416 +xfs_inode_ag_walk.isra.21 [vmlinux]: 424 +xfs_inode_ag_walk.isra.21 [vmlinux]: 424 +xfs_reclaim_inodes_ag [vmlinux]: 368 +xfs_reclaim_inodes_ag [vmlinux]: 368 xfs_trans_committed_bulk [vmlinux]: 336 -xfs_reclaim_inodes_ag [vmlinux]: 328 -xfs_reclaim_inodes_ag [vmlinux]: 328 xfs_ioc_getfsmap.isra.23 [vmlinux]: 320 xfs_ioc_getfsmap.isra.23 [vmlinux]: 320 +xfs_file_ioctl [vmlinux]: 320 +xfs_file_ioctl [vmlinux]: 320 +xfs_bmapi_write [vmlinux]: 312 xfs_getfsmap [vmlinux]: 304 xfs_qm_dquot_walk.isra.11 [vmlinux]: 296 xfs_qm_dquot_walk.isra.11 [vmlinux]: 296 -xfs_bmapi_write [vmlinux]: 288 -xfs_file_ioctl [vmlinux]: 288 -xfs_file_ioctl [vmlinux]: 288 +xfs_file_compat_ioctl [vmlinux]: 288 +xfs_file_compat_ioctl [vmlinux]: 288 xfs_sb_read_verify [vmlinux]: 280 xfs_sb_read_verify [vmlinux]: 280 xfs_sb_write_verify [vmlinux]: 272 @@ -21,36 +23,38 @@ xfs_rmap_convert [vmlinux]: 264 xfs_rmap_convert_shared [vmlinux]: 256 xfs_rmap_convert_shared [vmlinux]: 256 -xfs_file_compat_ioctl [vmlinux]: 256 -xfs_file_compat_ioctl [vmlinux]: 256 xfs_bmap_extents_to_btree [vmlinux]: 248 xfs_bmap_extents_to_btree [vmlinux]: 248 +xfs_bmap_del_extent_real [vmlinux]: 240 +xfs_alloc_fix_freelist [vmlinux]: 224 +xfs_alloc_fix_freelist [vmlinux]: 224 +xfs_bmap_add_extent_unwritten_real [vmlinux]:224 xfs_symlink [vmlinux]: 224 xfs_symlink [vmlinux]: 224 -xfs_alloc_fix_freelist [vmlinux]: 216 -xfs_alloc_fix_freelist [vmlinux]: 216 -xfs_bmap_local_to_extents.constprop.27 [vmlinux]:208 -xfs_bmap_local_to_extents.constprop.27 [vmlinux]:208 -xfs_ialloc_ag_alloc [vmlinux]: 208 -xfs_ialloc_ag_alloc [vmlinux]: 208 -xfs_bmap_add_extent_unwritten_real [vmlinux]:192 -xfs_bmap_add_extent_unwritten_real [vmlinux]:192 -xfs_bmap_add_extent_delay_real [vmlinux]:192 -xfs_bmap_add_extent_delay_real [vmlinux]:192 -xfs_bmap_del_extent_real [vmlinux]: 192 -xfs_bmap_del_extent_real [vmlinux]: 192 -xfs_bmap_btalloc [vmlinux]: 192 -xfs_bmap_btalloc [vmlinux]: 192 +xfs_bmap_btalloc [vmlinux]: 216 +xfs_bmap_btalloc [vmlinux]: 216 +xfs_attr_rmtval_set [vmlinux]: 208 +xfs_bmap_add_extent_delay_real [vmlinux]:208 +xfs_bmap_local_to_extents.constprop.28 [vmlinux]:208 +xfs_bmap_local_to_extents.constprop.28 [vmlinux]:208 +xfs_bulkstat [vmlinux]: 208 +xfs_ialloc_ag_alloc [vmlinux]: 200 +xfs_ialloc_ag_alloc [vmlinux]: 200 xfs_refcountbt_alloc_block [vmlinux]:192 xfs_refcountbt_alloc_block [vmlinux]:192 +xfs_reflink_remap_blocks [vmlinux]: 192 +xfs_reflink_remap_blocks [vmlinux]: 192 __xfs_bunmapi [vmlinux]: 184 __xfs_bunmapi [vmlinux]: 184 xfs_rmap_map [vmlinux]: 184 xfs_rmap_map [vmlinux]: 184 +xfs_readdir [vmlinux]: 184 +xfs_readdir [vmlinux]: 184 xfs_attr_set [vmlinux]: 176 xfs_attr_set [vmlinux]: 176 xfs_attr3_leaf_to_shortform [vmlinux]:176 xfs_attr3_leaf_to_shortform [vmlinux]:176 +xfs_bmap_add_extent_hole_real [vmlinux]:176 xfs_attr_shortform_to_leaf [vmlinux]:168 xfs_attr_shortform_to_leaf [vmlinux]:168 xfs_btree_delrec [vmlinux]: 168 @@ -59,89 +63,99 @@ xfs_rmap_unmap [vmlinux]: 168 xfs_rmap_map_shared [vmlinux]: 168 xfs_rmap_map_shared [vmlinux]: 168 -xfs_bulkstat [vmlinux]: 168 -xfs_bulkstat [vmlinux]: 168 xfs_scrub_metadata [vmlinux]: 168 xfs_scrub_metadata [vmlinux]: 168 xfs_free_extent_fix_freelist [vmlinux]:160 xfs_free_extent_fix_freelist [vmlinux]:160 -xfs_bmap_add_extent_hole_real [vmlinux]:160 -xfs_bmap_add_extent_hole_real [vmlinux]:160 +xfs_attr3_leaf_split [vmlinux]: 160 +xfs_attr3_leaf_split [vmlinux]: 160 xfs_bmap_insert_extents [vmlinux]: 160 xfs_bmap_insert_extents [vmlinux]: 160 xfs_bmbt_alloc_block [vmlinux]: 160 xfs_bmbt_alloc_block [vmlinux]: 160 xfs_btree_overlapped_query_range [vmlinux]:160 xfs_btree_overlapped_query_range [vmlinux]:160 +xfs_dialloc [vmlinux]: 160 +xfs_dialloc [vmlinux]: 160 __xfs_inobt_alloc_block.isra.9 [vmlinux]:160 __xfs_inobt_alloc_block.isra.9 [vmlinux]:160 xfs_ag_resv_rmapbt_alloc [vmlinux]: 160 xfs_ag_resv_rmapbt_alloc [vmlinux]: 160 +xfs_do_writepage [vmlinux]: 160 +xfs_do_writepage [vmlinux]: 160 xfs_dir2_leaf_readbuf [vmlinux]: 160 xfs_readlink_bmap_ilocked [vmlinux]: 160 xfs_readlink_bmap_ilocked [vmlinux]: 160 xfs_ag_resv_rmapbt_alloc [vmlinux]: 160 xfs_ag_resv_rmapbt_alloc [vmlinux]: 160 +xfs_da3_split [vmlinux]: 152 +xfs_da3_split [vmlinux]: 152 xfs_getbmap [vmlinux]: 152 xfs_getbmap [vmlinux]: 152 trace_raw_output_xfs_loggrant_class [vmlinux]:144 trace_raw_output_xfs_alloc_class [vmlinux]:144 xfs_attr_remove [vmlinux]: 144 xfs_attr_remove [vmlinux]: 144 -xfs_dialloc_ag_inobt [vmlinux]: 144 -xfs_dialloc_ag_inobt [vmlinux]: 144 +xfs_bmap_split_extent_at [vmlinux]: 144 +__xfs_btree_split.isra.45 [vmlinux]: 144 +__xfs_btree_split.isra.45 [vmlinux]: 144 +xfs_btree_insrec [vmlinux]: 144 +xfs_btree_insrec [vmlinux]: 144 +xfs_da_shrink_inode [vmlinux]: 144 +xfs_da_shrink_inode [vmlinux]: 144 +xfs_attr_list_int_ilocked [vmlinux]: 144 +xfs_attr_list_int_ilocked [vmlinux]: 144 xfs_swap_extent_rmap [vmlinux]: 144 xfs_swap_extent_rmap [vmlinux]: 144 -xfs_readdir [vmlinux]: 144 -xfs_readdir [vmlinux]: 144 +xfs_ioc_trim [vmlinux]: 144 +xfs_ioc_trim [vmlinux]: 144 xfs_inactive_symlink_rmt [vmlinux]: 144 xfs_inactive_symlink_rmt [vmlinux]: 144 xfs_attr_get [vmlinux]: 136 xfs_attr_get [vmlinux]: 136 +xfs_attr_rmtval_get [vmlinux]: 136 +xfs_attr_rmtval_get [vmlinux]: 136 xfs_bmap_add_attrfork_local [vmlinux]:136 xfs_bmap_add_attrfork_local [vmlinux]:136 -__xfs_btree_split.isra.38 [vmlinux]: 136 -__xfs_btree_split.isra.38 [vmlinux]: 136 xfs_btree_split [vmlinux]: 136 xfs_btree_split [vmlinux]: 136 -xfs_btree_insrec [vmlinux]: 136 -xfs_btree_insrec [vmlinux]: 136 +xfs_rmap_finish_one [vmlinux]: 136 +xfs_rmap_finish_one [vmlinux]: 136 +xfs_attr3_leaf_inactive [vmlinux]: 136 +xfs_attr3_leaf_inactive [vmlinux]: 136 xfs_rename [vmlinux]: 136 xfs_rename [vmlinux]: 136 xfs_attr3_leaf_unbalance [vmlinux]: 120 xfs_attr3_leaf_unbalance [vmlinux]: 120 -xfs_attr_rmtval_set [vmlinux]: 120 -xfs_attr_rmtval_set [vmlinux]: 120 -xfs_ioc_fsgeometry_v1 [vmlinux]: 120 -xfs_ioc_fsgeometry_v1 [vmlinux]: 120 -xfs_ioc_fsgeometry [vmlinux]: 120 -xfs_ioc_fsgeometry [vmlinux]: 120 +xfs_refcount_merge_extents [vmlinux]:120 +xfs_refcount_merge_extents [vmlinux]:120 xfs_file_iomap_begin [vmlinux]: 120 xfs_file_iomap_begin [vmlinux]: 120 -xfs_compat_ioc_fsgeometry_v1 [vmlinux]:120 -xfs_compat_ioc_fsgeometry_v1 [vmlinux]:120 +xfs_ifree [vmlinux]: 120 +xfs_ifree [vmlinux]: 120 +xfs_qm_reset_dqcounts_buf.part.15 [vmlinux]:120 +xfs_qm_reset_dqcounts_buf.part.15 [vmlinux]:120 +xfs_rtallocate_extent [vmlinux]: 120 +xfs_rtallocate_extent [vmlinux]: 120 +xfs_free_ag_extent [vmlinux]: 112 xfs_attr3_leaf_toosmall [vmlinux]: 112 xfs_attr3_leaf_toosmall [vmlinux]: 112 -xfs_attr3_leaf_rebalance [vmlinux]: 112 -xfs_attr3_leaf_rebalance [vmlinux]: 112 +xfs_bmap_del_extent_delay [vmlinux]: 112 +xfs_bmap_del_extent_delay [vmlinux]: 112 xfs_iread_extents [vmlinux]: 112 xfs_iread_extents [vmlinux]: 112 -xfs_bmap_split_extent_at [vmlinux]: 112 -xfs_bmap_split_extent_at [vmlinux]: 112 xfs_btree_insert [vmlinux]: 112 xfs_btree_query_range [vmlinux]: 112 -xfs_da3_swap_lastblock [vmlinux]: 112 -xfs_da3_swap_lastblock [vmlinux]: 112 xfs_dir2_node_addname [vmlinux]: 112 xfs_dir2_node_addname [vmlinux]: 112 xfs_dir2_node_removename [vmlinux]: 112 xfs_dir2_node_removename [vmlinux]: 112 -xfs_trim_extents [vmlinux]: 112 -xfs_trim_extents [vmlinux]: 112 +xfs_difree [vmlinux]: 112 +xfs_difree [vmlinux]: 112 xfs_growfs_data [vmlinux]: 112 xfs_growfs_data [vmlinux]: 112 -xfs_ifree_cluster.isra.21 [vmlinux]: 112 -xfs_ifree_cluster.isra.21 [vmlinux]: 112 +xfs_iget [vmlinux]: 112 +xfs_iget [vmlinux]: 112 xfs_inumbers [vmlinux]: 112 xfs_inumbers [vmlinux]: 112 xfs_reflink_end_cow [vmlinux]: 112 @@ -149,17 +163,19 @@ xfs_vn_listxattr [vmlinux]: 112 xfs_vn_listxattr [vmlinux]: 112 xfsaild [vmlinux]: 112 +xfs_growfs_rt [vmlinux]: 112 +xfs_growfs_rt [vmlinux]: 112 trace_raw_output_xfs_dquot_class [vmlinux]:104 xfs_bmapi_reserve_delalloc [vmlinux]:104 xfs_bmapi_reserve_delalloc [vmlinux]:104 +xfs_btree_lshift [vmlinux]: 104 +xfs_btree_lshift [vmlinux]: 104 xfs_da_grow_inode_int [vmlinux]: 104 xfs_da_grow_inode_int [vmlinux]: 104 xfs_dir2_leaf_removename [vmlinux]: 104 xfs_dir2_leaf_removename [vmlinux]: 104 xfs_dir2_leafn_split [vmlinux]: 104 xfs_dir2_leafn_split [vmlinux]: 104 -xfs_iget [vmlinux]: 104 -xfs_iget [vmlinux]: 104 xfs_ioc_space [vmlinux]: 104 xfs_ioc_space [vmlinux]: 104 xfs_emerg [vmlinux]: 104 @@ -169,15 +185,9 @@ xfs_warn [vmlinux]: 104 xfs_notice [vmlinux]: 104 xfs_info [vmlinux]: 104 -xfs_reflink_remap_extent [vmlinux]: 104 -xfs_reflink_remap_extent [vmlinux]: 104 -xfs_reflink_dirty_extents [vmlinux]: 104 -xfs_reflink_dirty_extents [vmlinux]: 104 xfs_reflink_cancel_cow_blocks [vmlinux]:104 xfs_reflink_cancel_cow_blocks [vmlinux]:104 xfs_log_quiesce [vmlinux]: 104 xfs_log_quiesce [vmlinux]: 104 -xfs_rtallocate_extent_near [vmlinux]:104 -xfs_rtallocate_extent_near [vmlinux]:104 xfs_set_acl [vmlinux]: 104 xfs_set_acl [vmlinux]: 104
