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linux-stable/fs/xfs/libxfs
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Darrick J. Wong df3954ff72 xfs: increase XFS_BTREE_MAXLEVELS to fit the rmapbt 
By my calculations, a 1,073,741,824 block AG with a 1k block size
can attain a maximum height of 9.  Assuming a record size of 24
bytes, a key/ptr size of 44 bytes, and half-full btree nodes, we'd
need 53,687,092 blocks for the records and ~6 million blocks for the
keys.  That requires a btree of height 9 based on the following
derivation:

Block size = 1024b
sblock CRC header = 56b
== 1024-56 = 968 bytes for tree data

rmapbt record = 24b
== 40 records per leaf block

rmapbt ptr/key = 44b
== 22 ptr/keys per block

Worst case, each block is half full, so 20 records and 11 ptrs per block.

1073741824 rmap records / 20 records per block
== 53687092 leaf blocks

53687092 leaves / 11 ptrs per block
== 4880645 level 1 blocks
== 443695 level 2 blocks
== 40336 level 3 blocks
== 3667 level 4 blocks
== 334 level 5 blocks
== 31 level 6 blocks
== 3 level 7 blocks
== 1 level 8 block

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
2016-08-03 11:29:42 +10:00
..
xfs_alloc.c xfs: add tracepoints and error injection for deferred extent freeing 2016-08-03 11:26:33 +10:00
xfs_alloc.h Merge branch 'xfs-4.8-misc-fixes-2' into for-next 2016-06-21 11:55:13 +10:00
xfs_alloc_btree.c xfs: add function pointers for get/update keys to the btree 2016-08-03 11:03:38 +10:00
xfs_alloc_btree.h
xfs_attr.c xfs: rename flist/free_list to dfops 2016-08-03 11:19:29 +10:00
xfs_attr_leaf.c xfs: rename flist/free_list to dfops 2016-08-03 11:19:29 +10:00
xfs_attr_leaf.h xfs: make several functions static 2016-06-01 17:38:15 +10:00
xfs_attr_remote.c xfs: rename flist/free_list to dfops 2016-08-03 11:19:29 +10:00
xfs_attr_remote.h
xfs_attr_sf.h xfs: move struct xfs_attr_shortform to xfs_da_format.h 2016-02-08 15:00:01 +11:00
xfs_bit.c libxfs: Optimize the loop for xfs_bitmap_empty 2016-01-04 16:10:19 +11:00
xfs_bit.h
xfs_bmap.c xfs: add tracepoints and error injection for deferred extent freeing 2016-08-03 11:26:33 +10:00
xfs_bmap.h xfs: rename flist/free_list to dfops 2016-08-03 11:19:29 +10:00
xfs_bmap_btree.c xfs: rename flist/free_list to dfops 2016-08-03 11:19:29 +10:00
xfs_bmap_btree.h
xfs_btree.c xfs: rework xfs_bmap_free callers to use xfs_defer_ops 2016-08-03 11:15:38 +10:00
xfs_btree.h xfs: increase XFS_BTREE_MAXLEVELS to fit the rmapbt 2016-08-03 11:29:42 +10:00
xfs_cksum.h
xfs_da_btree.c xfs: rename flist/free_list to dfops 2016-08-03 11:19:29 +10:00
xfs_da_btree.h xfs: rename flist/free_list to dfops 2016-08-03 11:19:29 +10:00
xfs_da_format.c xfs: kill xfs_dir2_inou_t 2016-07-20 11:48:31 +10:00
xfs_da_format.h xfs: fix attr shortform structure alignment on cris 2016-08-03 10:59:42 +10:00
xfs_defer.c xfs: add tracepoints for the deferred ops mechanism 2016-08-03 11:13:02 +10:00
xfs_defer.h xfs: change xfs_bmap_{finish,cancel,init,free} -> xfs_defer_* 2016-08-03 11:18:10 +10:00
xfs_dir2.c xfs: rename flist/free_list to dfops 2016-08-03 11:19:29 +10:00
xfs_dir2.h xfs: rename flist/free_list to dfops 2016-08-03 11:19:29 +10:00
xfs_dir2_block.c xfs: print name of verifier if it fails 2016-01-04 16:10:19 +11:00
xfs_dir2_data.c xfs: print name of verifier if it fails 2016-01-04 16:10:19 +11:00
xfs_dir2_leaf.c xfs: print name of verifier if it fails 2016-01-04 16:10:19 +11:00
xfs_dir2_node.c xfs: always set rvalp in xfs_dir2_node_trim_free 2016-03-15 11:44:18 +11:00
xfs_dir2_priv.h xfs: move type conversion functions to xfs_dir.h 2014-12-04 09:43:17 +11:00
xfs_dir2_sf.c xfs: kill xfs_dir2_inou_t 2016-07-20 11:48:31 +10:00
xfs_dquot_buf.c xfs: handle dquot buffer readahead in log recovery correctly 2016-01-12 07:04:01 +11:00
xfs_format.h xfs: remove the magic numbers in xfs_btree_block-related len macros 2016-07-20 10:43:11 +10:00
xfs_fs.h xfs: define XFS_IOC_FREEZE even if FIFREEZE is defined 2016-06-01 17:38:15 +10:00
xfs_ialloc.c xfs: rename flist/free_list to dfops 2016-08-03 11:19:29 +10:00
xfs_ialloc.h xfs: rename flist/free_list to dfops 2016-08-03 11:19:29 +10:00
xfs_ialloc_btree.c xfs: add function pointers for get/update keys to the btree 2016-08-03 11:03:38 +10:00
xfs_ialloc_btree.h xfs: allocate sparse inode chunks on full chunk allocation failure 2015-05-29 09:18:32 +10:00
xfs_inode_buf.c xfs: rework xfs_bmap_free callers to use xfs_defer_ops 2016-08-03 11:15:38 +10:00
xfs_inode_buf.h xfs: mode di_mode to vfs inode 2016-02-09 16:54:58 +11:00
xfs_inode_fork.c Merge branch 'xfs-4.7-inode-reclaim' into for-next 2016-05-20 10:34:00 +10:00
xfs_inode_fork.h xfs: factor out a helper to initialize a local format inode fork 2016-04-06 07:41:43 +10:00
xfs_log_format.h xfs: remove transaction types 2016-04-06 09:20:36 +10:00
xfs_log_recover.h xfs: support a crc verification only log record pass 2016-01-04 15:55:10 +11:00
xfs_log_rlimit.c xfs: move most of xfs_sb.h to xfs_format.h 2014-11-28 14:27:09 +11:00
xfs_quota_defs.h xfs: wire up Q_XGETNEXTQUOTA / get_nextdqblk 2016-02-08 11:27:38 +11:00
xfs_rtbitmap.c xfs: make several functions static 2016-06-01 17:38:15 +10:00
xfs_sb.c xfs: rework xfs_bmap_free callers to use xfs_defer_ops 2016-08-03 11:15:38 +10:00
xfs_sb.h xfs: remove unused function definitions 2016-02-08 14:58:07 +11:00
xfs_shared.h xfs: remove transaction types 2016-04-06 09:20:36 +10:00
xfs_symlink_remote.c xfs: print name of verifier if it fails 2016-01-04 16:10:19 +11:00
xfs_trans_resv.c xfs: change xfs_bmap_{finish,cancel,init,free} -> xfs_defer_* 2016-08-03 11:18:10 +10:00
xfs_trans_resv.h xfs: clean up XFS_MIN_FREELIST macros 2015-06-22 10:13:30 +10:00
xfs_trans_space.h xfs: clean up XFS_MIN_FREELIST macros 2015-06-22 10:13:30 +10:00
xfs_types.h xfs: move xfs_types.h to libxfs 2015-01-09 10:46:31 +11:00