AcoSail/kernel_optimize_test
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df44971468
kernel_optimize_test/fs/btrfs
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Nikolay Borisov df44971468 btrfs: Remove unnecessary tree locking code in qgroup_rescan_leaf 
In qgroup_rescan_leaf a copy is made of the target leaf by calling
btrfs_clone_extent_buffer. The latter allocates a new buffer and
attaches a new set of pages and copies the content of the source buffer.
The new scratch buffer is only used to iterate it's items, it's not
published anywhere and cannot be accessed by a third party.

Hence, it's not necessary to perform any locking on it whatsoever.
Furthermore, remove the extra extent_buffer_get call since the new
buffer is always allocated with a reference count of 1 which is
sufficient here.  No functional changes.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2018-12-17 14:51:31 +01:00
..
tests btrfs: tests: Use BTRFS_MAX_EXTENT_SIZE to replace the intermediate number 2018-12-17 14:51:30 +01:00
acl.c btrfs: remove unnecessary curly braces in btrfs_get_acl 2018-08-06 13:12:41 +02:00
async-thread.c
async-thread.h
backref.c btrfs: Remove needless tree locking in iterate_inode_extrefs 2018-12-17 14:51:30 +01:00
backref.h
btrfs_inode.h btrfs: Add function to distinguish between data and btree inode 2018-12-17 14:51:27 +01:00
check-integrity.c Btrfs: use args in the correct order for kcalloc in btrfsic_read_block 2018-10-15 17:23:30 +02:00
check-integrity.h
compression.c btrfs: Remove extent_io_ops::writepage_end_io_hook 2018-12-17 14:51:28 +01:00
compression.h btrfs: compression: Add linux/sizes.h for compression.h 2018-05-29 18:13:00 +02:00
ctree.c btrfs: Remove extra reference count bumps in btrfs_compare_trees 2018-12-17 14:51:30 +01:00
ctree.h Btrfs: prevent ioctls from interfering with a swap file 2018-12-17 14:51:29 +01:00
dedupe.h
delayed-inode.c Btrfs: kill btrfs_clear_path_blocking 2018-10-15 17:23:38 +02:00
delayed-inode.h Btrfs: delayed-inode: use rb_first_cached for ins_root and del_root 2018-10-15 17:23:33 +02:00
delayed-ref.c btrfs: delayed-ref: extract find_first_ref_head from find_ref_head 2018-10-17 19:21:00 +02:00
delayed-ref.h btrfs: delayed-ref: pass delayed_refs directly to btrfs_delayed_ref_lock 2018-10-15 17:23:41 +02:00
dev-replace.c Btrfs: prevent ioctls from interfering with a swap file 2018-12-17 14:51:29 +01:00
dev-replace.h btrfs: open code btrfs_after_dev_replace_commit 2018-10-15 17:23:37 +02:00
dir-item.c btrfs: Remove root parameter from btrfs_insert_dir_item 2018-10-15 17:23:25 +02:00
disk-io.c Btrfs: prevent ioctls from interfering with a swap file 2018-12-17 14:51:29 +01:00
disk-io.h btrfs: unify end_io callbacks of async_submit_bio 2018-08-06 13:12:55 +02:00
export.c btrfs: Remove 'objectid' member from struct btrfs_root 2018-10-15 17:23:25 +02:00
export.h
extent_io.c btrfs: Remove extent_io_ops::split_extent_hook callback 2018-12-17 14:51:29 +01:00
extent_io.h btrfs: Remove extent_io_ops::split_extent_hook callback 2018-12-17 14:51:29 +01:00
extent_map.c Btrfs: extent_map: use rb_first_cached 2018-10-15 17:23:33 +02:00
extent_map.h Btrfs: extent_map: use rb_first_cached 2018-10-15 17:23:33 +02:00
extent-tree.c btrfs: Refactor find_free_extent loops update into find_free_extent_update_loop 2018-12-17 14:51:26 +01:00
file-item.c btrfs: simplify pointer chasing of local fs_info variables 2018-08-06 13:12:43 +02:00
file.c for-4.20-rc4-tag 2018-11-28 08:38:20 -08:00
free-space-cache.c Btrfs: fix deadlock on tree root leaf when finding free extent 2018-11-06 16:42:32 +01:00
free-space-cache.h
free-space-tree.c btrfs: Remove fs_info from btrfs_del_root 2018-08-06 13:13:00 +02:00
free-space-tree.h btrfs: Remove fs_info argument from add_to_free_space_tree 2018-05-28 18:07:36 +02:00
inode-item.c
inode-map.c btrfs: prune unused includes 2018-08-06 13:12:43 +02:00
inode-map.h
inode.c Btrfs: support swap files 2018-12-17 14:51:29 +01:00
ioctl.c Btrfs: prevent ioctls from interfering with a swap file 2018-12-17 14:51:29 +01:00
Kconfig
locking.c btrfs: replace waitqueue_actvie with cond_wake_up 2018-05-28 18:23:09 +02:00
locking.h
lzo.c btrfs: lzo: Harden inline lzo compressed extent decompression 2018-05-30 16:46:43 +02:00
Makefile
math.h
ordered-data.c Btrfs: remove no longer used stuff for tracking pending ordered extents 2018-12-17 14:51:25 +01:00
ordered-data.h Btrfs: remove no longer used stuff for tracking pending ordered extents 2018-12-17 14:51:25 +01:00
orphan.c
print-tree.c btrfs: annotate unlikely branches after V0 extent type removal 2018-08-06 13:12:41 +02:00
print-tree.h
props.c btrfs: property: Set incompat flag if lzo/zstd compression is set 2018-05-17 14:18:25 +02:00
props.h
qgroup.c btrfs: Remove unnecessary tree locking code in qgroup_rescan_leaf 2018-12-17 14:51:31 +01:00
qgroup.h btrfs: qgroup: Avoid calling qgroup functions if qgroup is not enabled 2018-10-15 17:23:40 +02:00
raid56.c btrfs: raid56: catch errors from full_stripe_write 2018-08-06 13:12:45 +02:00
raid56.h
rcu-string.h
reada.c btrfs: prune unused includes 2018-08-06 13:12:43 +02:00
ref-verify.c btrfs: Remove 'objectid' member from struct btrfs_root 2018-10-15 17:23:25 +02:00
ref-verify.h
relocation.c Btrfs: prevent ioctls from interfering with a swap file 2018-12-17 14:51:29 +01:00
root-tree.c btrfs: Remove fs_info from btrfs_add_root_ref 2018-08-06 13:13:00 +02:00
scrub.c btrfs: open code btrfs_dev_replace_stats_inc 2018-10-15 17:23:37 +02:00
send.c Btrfs: send, fix infinite loop due to directory rename dependencies 2018-11-21 17:03:50 +01:00
send.h
struct-funcs.c btrfs: prune unused includes 2018-08-06 13:12:43 +02:00
super.c Btrfs: ensure path name is null terminated at btrfs_control_ioctl 2018-11-14 18:26:20 +01:00
sysfs.c btrfs: prune unused includes 2018-08-06 13:12:43 +02:00
sysfs.h btrfs: sysfs: Use enum/define value for feature array definitions 2018-05-28 18:23:39 +02:00
transaction.c Btrfs: remove no longer used stuff for tracking pending ordered extents 2018-12-17 14:51:25 +01:00
transaction.h Btrfs: remove no longer used stuff for tracking pending ordered extents 2018-12-17 14:51:25 +01:00
tree-checker.c btrfs: tree-checker: Don't check max block group size as current max chunk size limit is unreliable 2018-12-04 15:05:30 +01:00
tree-checker.h
tree-defrag.c
tree-log.c Btrfs: remove no longer used logged range variables when logging extents 2018-12-17 14:51:25 +01:00
tree-log.h btrfs: change btrfs_pin_log_trans to return void 2018-10-15 17:23:27 +02:00
ulist.c
ulist.h
uuid-tree.c btrfs: Remove fs_info argument from btrfs_uuid_tree_rem 2018-05-30 16:46:53 +02:00
volumes.c Btrfs: rename and export get_chunk_map 2018-12-17 14:51:29 +01:00
volumes.h Btrfs: rename and export get_chunk_map 2018-12-17 14:51:29 +01:00
xattr.c
xattr.h
zlib.c
zstd.c