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bb721703aa
linux/fs/btrfs
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Chris Mason bb721703aa Btrfs: reduce CPU contention while waiting for delayed extent operations 
We batch up operations to the extent allocation tree, which allows
us to deal with the recursive nature of using the extent allocation
tree to allocate extents to the extent allocation tree.

It also provides a mechanism to sort and collect extent
operations, which makes it much more efficient to record extents
that are close together.

The delayed extent operations must all be finished before the
running transaction commits, so we have code to make sure and run a few
of the batched operations when closing our transaction handles.

This creates a great deal of contention for the locks in the
delayed extent operation tree, and also contention for the lock on the
extent allocation tree itself.  All the extra contention just slows
down the operations and doesn't get things done any faster.

This commit changes things to use a wait queue instead.  As procs
want to run the delayed operations, one of them races in and gets
permission to hit the tree, and the others step back and wait for
progress to be made.

Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-02-01 14:24:25 -05:00
..
acl.c Btrfs: skip adding an acl attribute if we don't have to 2012-12-16 20:46:15 -05:00
async-thread.c Btrfs: call the ordered free operation without any locks held 2012-07-25 16:15:07 -04:00
async-thread.h btrfs: return void in functions without error conditions 2012-03-22 01:45:34 +01:00
backref.c Btrfs: merge inode_list in __merge_refs 2012-12-12 17:15:27 -05:00
backref.h Btrfs: extended inode refs support for send mechanism 2012-10-25 15:45:16 -04:00
btrfs_inode.h Btrfs: inline csums if we're fsyncing 2012-12-16 20:46:22 -05:00
check-integrity.c Btrfs: fix race in check-integrity caused by usage of bitfield 2012-12-16 20:46:13 -05:00
check-integrity.h Btrfs: add optional integrity check code 2011-12-21 19:14:09 +01:00
compat.h Btrfs: drop remaining LINUX_KERNEL_VERSION checks and compat code 2009-01-06 09:38:55 -05:00
compression.c Btrfs: add rw argument to merge_bio_hook() 2013-02-01 11:49:47 -05:00
compression.h btrfs: return void in functions without error conditions 2012-03-22 01:45:34 +01:00
ctree.c Revert "Btrfs: reorder tree mod log operations in deleting a pointer" 2012-12-18 19:35:32 -05:00
ctree.h Btrfs: Add a stripe cache to raid56 2013-02-01 14:24:23 -05:00
delayed-inode.c Btrfs: cleanup for btrfs_btree_balance_dirty 2012-12-12 17:15:28 -05:00
delayed-inode.h Btrfs: flush delayed inodes if we're short on space 2012-07-23 15:41:40 -04:00
delayed-ref.c Btrfs: allow delayed refs to be merged 2012-08-28 16:53:38 -04:00
delayed-ref.h Btrfs: reduce CPU contention while waiting for delayed extent operations 2013-02-01 14:24:25 -05:00
dev-replace.c Btrfs: add new sources for device replace code 2012-12-12 17:15:41 -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 hash overflow handling 2012-12-17 14:48:21 -05:00
disk-io.c Btrfs: RAID5 and RAID6 2013-02-01 14:24:23 -05:00
disk-io.h Btrfs: RAID5 and RAID6 2013-02-01 14:24:23 -05:00
export.c ->encode_fh() API change 2012-05-29 23:28:33 -04:00
export.h
extent_io.c Btrfs: reduce lock contention on extent buffer locks 2013-02-01 14:24:25 -05:00
extent_io.h Btrfs: add rw argument to merge_bio_hook() 2013-02-01 11:49:47 -05:00
extent_map.c Btrfs: log changed inodes based on the extent map tree 2012-12-16 20:46:24 -05:00
extent_map.h Btrfs: do not mark ems as prealloc if we are writing to them 2012-12-16 20:46:23 -05:00
extent-tree.c Btrfs: reduce CPU contention while waiting for delayed extent operations 2013-02-01 14:24:25 -05:00
file-item.c Btrfs: fix wrong file extent length 2012-12-12 17:15:21 -05:00
file.c Btrfs: do not call file_update_time in aio_write 2012-12-16 20:46:27 -05:00
free-space-cache.c Btrfs: RAID5 and RAID6 2013-02-01 14:24:23 -05:00
free-space-cache.h btrfs: remove all unused functions 2011-05-06 12:34:03 +02:00
hash.h btrfs: extended inode refs 2012-10-09 09:14:45 -04:00
inode-item.c btrfs: extended inode refs 2012-10-09 09:14:45 -04:00
inode-map.c Btrfs: improve the noflush reservation 2012-12-11 13:31:31 -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: RAID5 and RAID6 2013-02-01 14:24:23 -05:00
ioctl.c Btrfs: fix a bug of per-file nocow 2012-12-17 14:48:21 -05:00
ioctl.h Btrfs: add support for device replace ioctls 2012-12-16 20:46:06 -05:00
Kconfig Btrfs: RAID5 and RAID6 2013-02-01 14:24:23 -05:00
locking.c Btrfs: fix a misplaced address operator in a condition 2012-08-28 16:53:23 -04:00
locking.h btrfs: return void in functions without error conditions 2012-03-22 01:45:34 +01:00
lzo.c btrfs: remove the second argument of k[un]map_atomic() 2012-03-20 21:48:21 +08:00
Makefile Btrfs: RAID5 and RAID6 2013-02-01 14:24:23 -05:00
math.h Btrfs: cleanup duplicated division functions 2012-12-11 13:31:30 -05:00
ordered-data.c Btrfs: cleanup for btrfs_wait_order_range 2012-12-12 17:15:19 -05:00
ordered-data.h Btrfs: make ordered extent be flushed by multi-task 2012-12-11 13:31:38 -05:00
orphan.c btrfs: replace many BUG_ONs with proper error handling 2012-03-22 11:52:54 +01:00
print-tree.c Btrfs: introduce a btrfs_dev_replace_item type 2012-12-12 17:15:38 -05:00
print-tree.h
qgroup.c Btrfs: fix memory leak in btrfs_quota_enable() 2012-10-25 15:45:43 -04:00
raid56.c Btrfs: add a plugging callback to raid56 writes 2013-02-01 14:24:24 -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: introduce GET_READ_MIRRORS functionality for btrfs_map_block() 2012-12-12 17:15:43 -05:00
relocation.c Btrfs: cleanup for btrfs_btree_balance_dirty 2012-12-12 17:15:28 -05:00
root-tree.c Btrfs: rename root_times_lock to root_item_lock 2012-12-16 20:46:21 -05:00
scrub.c Btrfs: RAID5 and RAID6 2013-02-01 14:24:23 -05:00
send.c Btrfs: rename root_times_lock to root_item_lock 2012-12-16 20:46:21 -05:00
send.h Btrfs: write_buf is now callable outside send.c 2012-10-04 09:39:55 -04:00
struct-funcs.c Btrfs: rewrite BTRFS_SETGET_FUNCS 2012-07-23 16:28:06 -04:00
super.c Btrfs: use slabs for auto defrag allocation 2012-12-16 20:46:11 -05:00
sysfs.c btrfs: Remove unused sysfs code 2011-06-17 14:54:18 -04:00
transaction.c Btrfs: reduce CPU contention while waiting for delayed extent operations 2013-02-01 14:24:25 -05:00
transaction.h Btrfs: improve the noflush reservation 2012-12-11 13:31:31 -05:00
tree-defrag.c btrfs: drop unused parameter from btrfs_release_path 2011-05-02 13:57:22 +02:00
tree-log.c Btrfs: use tokens where we can in the tree log 2012-12-16 20:46:26 -05:00
tree-log.h btrfs: return void in functions without error conditions 2012-03-22 01:45:34 +01:00
ulist.c Btrfs: make aux field of ulist 64 bit 2012-10-01 15:18:53 -04:00
ulist.h Btrfs: make aux field of ulist 64 bit 2012-10-01 15:18:53 -04:00
version.h Update Btrfs files for in-kernel usage 2008-09-25 15:41:59 -04:00
volumes.c Btrfs: RAID5 and RAID6 2013-02-01 14:24:23 -05:00
volumes.h Btrfs: RAID5 and RAID6 2013-02-01 14:24:23 -05:00
xattr.c Btrfs: only log the inode item if we can get away with it 2012-12-16 20:46:21 -05:00
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