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remarkable-linux/fs/btrfs
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Chris Mason 242e18c7c1 Btrfs: reduce lock contention on extent buffer locks 
The extent buffers have a refs_lock which we use to make coordinate freeing
the extent buffer with operations on the radix tree.  On tree roots and
other extent buffers that very cache hot, this can be highly contended.

These are also the extent buffers that are basically pinned in memory.
This commit adds code to cmpxchg our way through the ref modifications,
and as long as the result of the reference change is still pinned in
ram, we skip the expensive spinlock.

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 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2012-10-01 09:06:36 -07:00
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 NFS support for btrfs - v3 2008-09-25 11:04:06 -04:00
extent-tree.c Btrfs: fix cluster alignment for mount -o ssd 2013-02-01 14:24:24 -05:00
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
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 Btrfs: Create extent_buffer interface for large blocksizes 2008-09-25 11:03:56 -04:00
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: RAID5 and RAID6 2013-02-01 14:24:23 -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