Filipe David Borba Manana 5a4267ca20 Btrfs: try harder to avoid btree node splits ... When attempting to move items from our target leaf to its neighbor leaves (right and left), we only need to free data_size - free_space bytes from our leaf in order to add the new item (which has size of data_size bytes). Therefore attempt to move items to the right and left leaves if they have at least data_size - free_space bytes free, instead of data_size bytes free. After 5 runs of the following test, I got a smaller number of btree node splits overall: sysbench --test=fileio --file-num=512 --file-total-size=5G \ --file-test-mode=seqwr --num-threads=512 \ --file-block-size=8192 --max-requests=100000 --file-io-mode=sync Before this change: * 6171 splits (average of 5 test runs) * 61.508Mb/sec of throughput (average of 5 test runs) After this change: * 6036 splits (average of 5 test runs) * 63.533Mb/sec of throughput (average of 5 test runs) An ideal test would not just have multiple threads/processes writing to a file (insertion of file extent items) but also do other operations that result in insertion of items with varied sizes, like file/directory creations, creation of links, symlinks, xattrs, etc. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>		2014-01-28 13:19:46 -08:00
..
tests	Btrfs: add a sanity test for a vacant extent at the front of a file	2013-11-11 21:58:19 -05:00
acl.c	Btrfs: fix incorrect inode acl reset	2013-11-11 22:02:51 -05:00
async-thread.c	Btrfs: fix __btrfs_start_workers retval	2013-11-20 20:42:11 -05:00
async-thread.h	Btrfs: eliminate races in worker stopping code	2013-10-04 16:02:13 -04:00
backref.c	btrfs: bootstrap generic btrfs_find_item interface	2014-01-28 13:19:36 -08:00
backref.h	Btrfs: allocate prelim_ref with a slab allocater	2013-09-01 08:16:27 -04:00
btrfs_inode.h	Btrfs: improve inode hash function/inode lookup	2013-11-11 21:55:19 -05:00
check-integrity.c	Btrfs: fix check-integrity to look at the referenced data properly	2014-01-28 13:19:21 -08:00
check-integrity.h	block: submit_bio_wait() conversions	2013-11-24 16:33:41 -07:00
compression.c	btrfs: Fix checkpatch.pl warning of spacing issues	2013-11-11 22:12:31 -05:00
compression.h	btrfs: make static code static & remove dead code	2013-05-06 15:55:23 -04:00
ctree.c	Btrfs: try harder to avoid btree node splits	2014-01-28 13:19:46 -08:00
ctree.h	Btrfs: make btrfs_debug match pr_debug handling related to DEBUG	2014-01-28 13:19:39 -08:00
delayed-inode.c	btrfs: Replace kmalloc with kmalloc_array	2013-11-11 22:12:22 -05:00
delayed-inode.h	[readdir] convert btrfs	2013-06-29 12:57:00 +04:00
delayed-ref.c	Btrfs: skip merge part for delayed data refs	2014-01-28 13:19:23 -08:00
delayed-ref.h	Btrfs: introduce a head ref rbtree	2014-01-28 13:19:22 -08:00
dev-replace.c	btrfs: fix typo in the log message	2013-11-20 20:44:47 -05:00
dev-replace.h	Btrfs: add new sources for device replace code	2012-12-12 17:15:41 -05:00
dir-item.c	Btrfs: fix verification of dir_item	2013-11-11 22:10:36 -05:00
disk-io.c	btrfs: expand btrfs_find_item() to include find_orphan_item functionality	2014-01-28 13:19:37 -08:00
disk-io.h	Btrfs: add a sanity test for btrfs_split_item	2013-11-11 21:51:02 -05:00
export.c	btrfs: remove fs/btrfs/compat.h	2013-11-11 22:03:19 -05:00
export.h	NFS support for btrfs - v3	2008-09-25 11:04:06 -04:00
extent_io.c	btrfs: remove unused variables from extent_io.c	2014-01-28 13:19:33 -08:00
extent_io.h	Btrfs: Simplify the logic in alloc_extent_buffer() for existing extent buffer case	2013-11-11 21:59:11 -05:00
extent_map.c	btrfs: make static code static & remove dead code	2013-05-06 15:55:23 -04:00
extent_map.h	btrfs: Enclose macros with complex values within parenthesis	2013-11-11 22:12:06 -05:00
extent-tree.c	btrfs: fix static checker warnings	2014-01-28 13:19:44 -08:00
file-item.c	btrfs: Use WARN_ON()'s return value in place of WARN_ON(1)	2013-11-11 22:11:53 -05:00
file.c	Btrfs: fix ordered extent check in btrfs_punch_hole	2014-01-28 13:19:42 -08:00
free-space-cache.c	btrfs: remove unused variable from setup_cluster_no_bitmap	2014-01-28 13:19:33 -08:00
free-space-cache.h	Btrfs: remove path arg from btrfs_truncate_free_space_cache	2013-11-11 21:51:33 -05:00
hash.h	btrfs: extended inode refs	2012-10-09 09:14:45 -04:00
inode-item.c	btrfs: cleanup: removed unused 'btrfs_get_inode_ref_index'	2014-01-28 13:19:39 -08:00
inode-map.c	btrfs: Use WARN_ON()'s return value in place of WARN_ON(1)	2013-11-11 22:11:53 -05:00
inode-map.h	Btrfs: Support reading/writing on disk free ino cache	2011-04-25 16:46:11 +08:00
inode.c	Btrfs: fix very slow inode eviction and fs unmount	2014-01-28 13:19:44 -08:00
ioctl.c	btrfs: add ioctl to export size of global metadata reservation	2014-01-28 13:19:28 -08:00
Kconfig	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs	2013-11-22 08:38:55 -08:00
locking.c	btrfs: make static code static & remove dead code	2013-05-06 15:55:23 -04:00
locking.h	Btrfs: remove btrfs_try_spin_lock	2013-03-14 14:57:10 -04:00
lzo.c	Btrfs: return -1 when lzo compression makes data bigger	2013-09-01 07:57:19 -04:00
Makefile	Btrfs: add tests for btrfs_get_extent	2013-11-11 21:57:30 -05:00
math.h	Btrfs: cleanup duplicated division functions	2012-12-11 13:31:30 -05:00
ordered-data.c	Btrfs: avoid unnecessary ordered extent cache resets	2014-01-28 13:19:46 -08:00
ordered-data.h	Btrfs: don't wait for the completion of all the ordered extents	2013-11-11 22:13:44 -05:00
orphan.c	btrfs: expand btrfs_find_item() to include find_orphan_item functionality	2014-01-28 13:19:37 -08:00
print-tree.c	btrfs: drop unused parameter from btrfs_item_nr	2013-11-11 21:50:48 -05:00
print-tree.h	btrfs: make static code static & remove dead code	2013-05-06 15:55:23 -04:00
qgroup.c	btrfs: fix unused variables in qgroup.c	2014-01-28 13:19:35 -08:00
raid56.c	btrfs: remove fs/btrfs/compat.h	2013-11-11 22:03:19 -05:00
raid56.h	Btrfs: RAID5 and RAID6	2013-02-01 14:24:23 -05:00
rcu-string.h	Btrfs: use rcu to protect device->name	2012-06-14 21:29:16 -04:00
reada.c	Btrfs: fix reada debug code compilation	2013-05-06 15:54:55 -04:00
relocation.c	Btrfs: improve forever loop when doing balance relocation	2014-01-28 13:19:43 -08:00
root-tree.c	btrfs: expand btrfs_find_item() to include find_root_ref functionality	2014-01-28 13:19:36 -08:00
scrub.c	btrfs: remove unused variable from scrub_fixup_nodatasum	2014-01-28 13:19:34 -08:00
send.c	Btrfs: incompatible format change to remove hole extents	2014-01-28 13:19:21 -08:00
send.h	btrfs: make static code static & remove dead code	2013-05-06 15:55:23 -04:00
struct-funcs.c	Btrfs: rewrite BTRFS_SETGET_FUNCS	2012-07-23 16:28:06 -04:00
super.c	Btrfs: don't clear the default compression type	2013-12-12 07:11:19 -08:00
sysfs.c	btrfs: fix leaks during sysfs teardown	2014-01-28 13:19:45 -08:00
sysfs.h	btrfs: publish allocation data in sysfs	2014-01-28 13:19:29 -08:00
transaction.c	Btrfs: introduce a head ref rbtree	2014-01-28 13:19:22 -08:00
transaction.h	Btrfs: fix BUG_ON() casued by the reserved space migration	2013-11-11 21:54:28 -05:00
tree-defrag.c	Btrfs: cleanup dead code of defragment	2013-11-11 21:59:45 -05:00
tree-log.c	btrfs: expand btrfs_find_item() to include find_orphan_item functionality	2014-01-28 13:19:37 -08:00
tree-log.h	btrfs: make static code static & remove dead code	2013-05-06 15:55:23 -04:00
ulist.c	Btrfs: fix crash regarding to ulist_add_merge	2013-07-02 11:50:59 -04:00
ulist.h	Btrfs: add a rb_tree to improve performance of ulist search	2013-05-06 15:54:44 -04:00
uuid-tree.c	Btrfs: remove unused max_key arg from btrfs_search_forward	2013-11-11 21:54:57 -05:00
volumes.c	btrfs: fix bio_size_ok() for max_sectors > 0xffff	2013-11-20 20:48:44 -05:00
volumes.h	btrfs: Pack struct btrfs_device	2013-11-11 22:11:26 -05:00
xattr.c	btrfs: make static code static & remove dead code	2013-05-06 15:55:23 -04:00
xattr.h	fs/vfs/security: pass last path component to LSM on inode creation	2011-02-01 11:12:29 -05:00
zlib.c	btrfs: fix message printing	2012-10-09 09:19:57 -04:00