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e48264e601b39df3c8c75f3e7ae896d15cbbebcc
linux/fs/btrfs
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Filipe Manana e48264e601 btrfs: avoid unnecessary memory allocation and copy at overwrite_item() 
There's no need to allocate memory and copy from both the destination and
source extent buffers to compare if the items are equal, we can instead
use memcmp_extent_buffer() which allows to do only one memory allocation
and copy instead of two.

So use memcmp_extent_buffer() instead of memcmp(), allowing us to avoid
one memory allocation, which can fail or be slow while under memory heavy
pressure, avoid the memory copying and reducing code.

Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2025-03-18 20:35:54 +01:00
..
tests
btrfs: tests: fix chunk map leak after failure to add it to the tree
2025-03-18 20:35:51 +01:00
accessors.c
move asm/unaligned.h to linux/unaligned.h
2024-10-02 17:23:23 -04:00
accessors.h
btrfs: update include and forward declarations in headers
2025-03-18 20:35:43 +01:00
acl.c
btrfs: remove unused included headers
2024-03-04 16:24:46 +01:00
acl.h
btrfs: update include and forward declarations in headers
2025-03-18 20:35:43 +01:00
async-thread.c
btrfs: async-thread: switch local variables need_order bool
2025-03-18 20:35:42 +01:00
async-thread.h
btrfs: add forward declarations and headers, part 1
2024-03-04 16:24:49 +01:00
backref.c
btrfs: unify ordering of btrfs_key initializations
2025-03-18 20:35:42 +01:00
backref.h
btrfs: remove detached list from struct btrfs_backref_cache
2025-01-13 14:53:15 +01:00
bio.c
btrfs: avoid unnecessary bio dereference at run_one_async_done()
2025-03-18 20:35:50 +01:00
bio.h
btrfs: fix error propagation of split bios
2024-10-23 18:17:43 +02:00
block-group.c
btrfs: codify pattern for adding block_group to bg_list
2025-03-18 20:35:51 +01:00
block-group.h
btrfs: constify more pointer parameters
2024-09-10 16:51:22 +02:00
block-rsv.c
btrfs: drop fs_info argument from btrfs_update_space_info_*()
2025-01-13 14:53:14 +01:00
block-rsv.h
btrfs: constify more pointer parameters
2024-09-10 16:51:22 +02:00
btrfs_inode.h
btrfs: make btrfs_iget_path() return a btrfs inode instead
2025-03-18 20:35:50 +01:00
compression.c
btrfs: defrag: extend ioctl to accept compression levels
2025-03-18 20:35:50 +01:00
compression.h
btrfs: defrag: extend ioctl to accept compression levels
2025-03-18 20:35:50 +01:00
ctree.c
btrfs: avoid redundant path slot assignment in btrfs_search_forward()
2025-03-18 20:35:52 +01:00
ctree.h
btrfs: update include and forward declarations in headers
2025-03-18 20:35:43 +01:00
defrag.c
btrfs: make btrfs_iget() return a btrfs inode instead
2025-03-18 20:35:50 +01:00
defrag.h
btrfs: pass struct btrfs_inode to btrfs_defrag_file()
2025-03-18 20:35:43 +01:00
delalloc-space.c
btrfs: drop fs_info argument from btrfs_update_space_info_*()
2025-01-13 14:53:14 +01:00
delalloc-space.h
btrfs: constify pointer parameters where applicable
2024-07-11 15:33:22 +02:00
delayed-inode.c
btrfs: do trivial BTRFS_PATH_AUTO_FREE conversions
2025-03-18 20:35:47 +01:00
delayed-inode.h
btrfs: pass struct btrfs_inode to btrfs_fill_inode()
2025-03-18 20:35:43 +01:00
delayed-ref.c
btrfs: update tree_insert() to use rb helpers
2025-01-13 14:53:18 +01:00
delayed-ref.h
btrfs: update include and forward declarations in headers
2025-03-18 20:35:43 +01:00
dev-replace.c
btrfs: return a literal instead of a variable in btrfs_init_dev_replace()
2025-03-18 20:35:49 +01:00
dev-replace.h
btrfs: add forward declarations and headers, part 1
2024-03-04 16:24:49 +01:00
dir-item.c
btrfs: use BTRFS_PATH_AUTO_FREE in btrfs_check_dir_item_collision()
2025-03-18 20:35:47 +01:00
dir-item.h
btrfs: update include and forward declarations in headers
2025-03-18 20:35:43 +01:00
direct-io.c
btrfs: pass struct btrfs_inode to can_nocow_extent()
2025-03-18 20:35:43 +01:00
direct-io.h
btrfs: update include and forward declarations in headers
2025-03-18 20:35:43 +01:00
discard.c
btrfs: make btrfs_discard_workfn() block_group ref explicit
2025-03-18 20:35:51 +01:00
discard.h
btrfs: update include and forward declarations in headers
2025-03-18 20:35:43 +01:00
disk-io.c
btrfs: don't clobber ret in btrfs_validate_super()
2025-03-18 20:35:54 +01:00
disk-io.h
btrfs: remove stray comment about SRCU
2025-01-13 14:53:21 +01:00
export.c
btrfs: make btrfs_iget() return a btrfs inode instead
2025-03-18 20:35:50 +01:00
export.h
btrfs: add forward declarations and headers, part 1
2024-03-04 16:24:49 +01:00
extent_io.c
btrfs: prepare extent_io.c for future large folio support
2025-03-18 20:35:53 +01:00
extent_io.h
btrfs: add __pure attribute to eb page and folio counters
2025-03-18 20:35:47 +01:00
extent_map.c
btrfs: do regular iput instead of delayed iput during extent map shrinking
2025-02-21 09:32:11 +01:00
extent_map.h
btrfs: make the extent map shrinker run asynchronously as a work queue job
2024-11-11 14:34:17 +01:00
extent-io-tree.c
btrfs: add __cold attribute to extent_io_tree_panic()
2025-03-18 20:35:42 +01:00
extent-io-tree.h
btrfs: introduce EXTENT_DIO_LOCKED
2024-09-10 16:51:20 +02:00
extent-tree.c
btrfs: harden block_group::bg_list against list_del() races
2025-03-18 20:35:51 +01:00
extent-tree.h
btrfs: update include and forward declarations in headers
2025-03-18 20:35:43 +01:00
fiemap.c
btrfs: correct typos in multiple comments across various files
2024-11-11 14:34:14 +01:00
fiemap.h
btrfs: move fiemap code into its own file
2024-07-11 15:33:20 +02:00
file-item.c
btrfs: use BTRFS_PATH_AUTO_FREE in btrfs_lookup_bio_sums()
2025-03-18 20:35:48 +01:00
file-item.h
btrfs: update include and forward declarations in headers
2025-03-18 20:35:43 +01:00
file.c
btrfs: prepare btrfs_page_mkwrite() for large folios
2025-03-18 20:35:53 +01:00
file.h
btrfs: update include and forward declarations in headers
2025-03-18 20:35:43 +01:00
free-space-cache.c
btrfs: make btrfs_iget_path() return a btrfs inode instead
2025-03-18 20:35:50 +01:00
free-space-cache.h
btrfs: add cancellation points to trim loops
2024-10-07 23:21:56 +02:00
free-space-tree.c
btrfs: use BTRFS_PATH_AUTO_FREE in load_free_space_tree()
2025-03-18 20:35:48 +01:00
free-space-tree.h
btrfs: add forward declarations and headers, part 2
2024-03-04 16:24:49 +01:00
fs.c
btrfs: update include and forward declarations in headers
2025-03-18 20:35:43 +01:00
fs.h
btrfs: add extra warning if delayed iput is added when it's not allowed
2025-03-18 20:35:52 +01:00
inode-item.c
btrfs: unify ordering of btrfs_key initializations
2025-03-18 20:35:42 +01:00
inode-item.h
btrfs: constify more pointer parameters
2024-09-10 16:51:22 +02:00
inode.c
btrfs: prepare btrfs_launcher_folio() for large folios support
2025-03-18 20:35:52 +01:00
ioctl.c
btrfs: simplify the return value handling in search_ioctl()
2025-03-18 20:35:51 +01:00
ioctl.h
btrfs: pass struct btrfs_inode to btrfs_sync_inode_flags_to_i_flags()
2025-03-18 20:35:49 +01:00
Kconfig
btrfs: split out CONFIG_BTRFS_EXPERIMENTAL from CONFIG_BTRFS_DEBUG
2024-11-11 14:34:12 +01:00
locking.c
btrfs: update include and forward declarations in headers
2025-03-18 20:35:43 +01:00
locking.h
btrfs: add assertions and comment about path expectations to btrfs_cross_ref_exist()
2025-01-13 14:53:16 +01:00
lru_cache.c
btrfs: fix typos found by codespell
2023-12-15 23:00:04 +01:00
lru_cache.h
btrfs: cleanup recursive include of the same header
2024-07-11 15:33:22 +02:00
lzo.c
btrfs: lzo: drop unused paramter level from lzo_alloc_workspace()
2024-11-11 14:34:16 +01:00
Makefile
btrfs: selftests: add delayed ref self test cases
2025-01-13 14:53:13 +01:00
messages.c
btrfs: disable rate limiting when debug enabled
2024-10-01 19:29:41 +02:00
messages.h
btrfs: constify fs_info parameter in __btrfs_panic()
2023-12-15 20:27:02 +01:00
misc.h
btrfs: constify pointer parameters where applicable
2024-07-11 15:33:22 +02:00
ordered-data.c
btrfs: introduce a read path dedicated extent lock helper
2025-03-18 20:35:48 +01:00
ordered-data.h
btrfs: introduce a read path dedicated extent lock helper
2025-03-18 20:35:48 +01:00
orphan.c
btrfs: BTRFS_PATH_AUTO_FREE in orphan.c
2024-09-10 16:51:22 +02:00
orphan.h
btrfs: add forward declarations and headers, part 1
2024-03-04 16:24:49 +01:00
print-tree.c
btrfs: avoid using fixed char array size for tree names
2024-08-02 22:44:27 +02:00
print-tree.h
btrfs: update include and forward declarations in headers
2025-03-18 20:35:43 +01:00
props.c
btrfs: props: switch prop_handler::extract to struct btrfs_inode
2025-03-18 20:35:44 +01:00
props.h
btrfs: pass struct btrfs_inode to btrfs_inode_inherit_props()
2025-03-18 20:35:44 +01:00
qgroup.c
btrfs: unify ordering of btrfs_key initializations
2025-03-18 20:35:42 +01:00
qgroup.h
btrfs: update include and forward declarations in headers
2025-03-18 20:35:43 +01:00
raid56.c
btrfs: make assert_rbio() to only check CONFIG_BTRFS_ASSERT
2024-11-11 14:34:12 +01:00
raid56.h
btrfs: add forward declarations and headers, part 2
2024-03-04 16:24:49 +01:00
raid-stripe-tree.c
btrfs: don't use btrfs_set_item_key_safe on RAID stripe-extents
2025-01-14 15:52:22 +01:00
raid-stripe-tree.h
btrfs: update include and forward declarations in headers
2025-03-18 20:35:43 +01:00
rcu-string.h
btrfs: add forward declarations and headers, part 1
2024-03-04 16:24:49 +01:00
ref-verify.c
btrfs: ref-verify: fix use-after-free after invalid ref action
2024-11-29 16:52:29 +01:00
ref-verify.h
btrfs: add forward declarations and headers, part 1
2024-03-04 16:24:49 +01:00
reflink.c
btrfs: use struct btrfs_inode inside btrfs_remap_file_range_prep()
2025-03-18 20:35:44 +01:00
reflink.h
btrfs: add forward declarations and headers, part 1
2024-03-04 16:24:49 +01:00
relocation.c
btrfs: remove unnecessary fs_info argument from delete_block_group_cache()
2025-03-18 20:35:50 +01:00
relocation.h
btrfs: add forward declarations and headers, part 1
2024-03-04 16:24:49 +01:00
root-tree.c
btrfs: root-tree: remove unnecessary calls to btrfs_mark_buffer_dirty()
2025-01-13 14:53:20 +01:00
root-tree.h
btrfs: qgroup: fix qgroup prealloc rsv leak in subvolume operations
2024-04-02 19:18:23 +02:00
scrub.c
btrfs: unify ordering of btrfs_key initializations
2025-03-18 20:35:42 +01:00
scrub.h
btrfs: add forward declarations and headers, part 1
2024-03-04 16:24:49 +01:00
send.c
btrfs: make btrfs_iget() return a btrfs inode instead
2025-03-18 20:35:50 +01:00
send.h
btrfs: pass btrfs_root pointers to send ioctl parameters
2025-03-18 20:35:49 +01:00
space-info.c
btrfs: update include and forward declarations in headers
2025-03-18 20:35:43 +01:00
space-info.h
btrfs: zoned: reclaim unused zone by zone resetting
2025-01-13 14:53:14 +01:00
subpage.c
btrfs: replace PAGE_SIZE with folio_size for subpage.[ch]
2025-03-18 20:35:52 +01:00
subpage.h
btrfs: replace PAGE_SIZE with folio_size for subpage.[ch]
2025-03-18 20:35:52 +01:00
super.c
btrfs: make btrfs_iget() return a btrfs inode instead
2025-03-18 20:35:50 +01:00
super.h
btrfs: change BTRFS_MOUNT_* flags to 64bit type
2024-07-19 17:20:23 +02:00
sysfs.c
btrfs: allow debug builds to accept 2K block size
2025-03-18 20:35:49 +01:00
sysfs.h
btrfs: update include and forward declarations in headers
2025-03-18 20:35:43 +01:00
transaction.c
btrfs: explicitly ref count block_group on new_bgs list
2025-03-18 20:35:51 +01:00
transaction.h
btrfs: move abort_should_print_stack() to transaction.h
2025-01-13 14:53:17 +01:00
tree-checker.c
btrfs: validate system chunk array at btrfs_validate_super()
2025-01-13 14:53:18 +01:00
tree-checker.h
btrfs: validate system chunk array at btrfs_validate_super()
2025-01-13 14:53:18 +01:00
tree-log.c
btrfs: avoid unnecessary memory allocation and copy at overwrite_item()
2025-03-18 20:35:54 +01:00
tree-log.h
btrfs: avoid transaction commit on any fsync after subvolume creation
2024-07-11 15:33:24 +02:00
tree-mod-log.c
btrfs: drop unused parameter path from btrfs_tree_mod_log_rewind()
2024-11-11 14:34:15 +01:00
tree-mod-log.h
btrfs: drop unused parameter path from btrfs_tree_mod_log_rewind()
2024-11-11 14:34:15 +01:00
ulist.c
btrfs: preallocate ulist memory for qgroup rsv
2024-07-11 15:33:26 +02:00
ulist.h
btrfs: preallocate ulist memory for qgroup rsv
2024-07-11 15:33:26 +02:00
uuid-tree.c
btrfs: uuid-tree: remove unnecessary call to btrfs_mark_buffer_dirty()
2025-01-13 14:53:20 +01:00
uuid-tree.h
btrfs: move uuid tree related code to uuid-tree.[ch]
2024-09-10 16:51:12 +02:00
verity.c
btrfs: pass struct btrfs_inode to btrfs_sync_inode_flags_to_i_flags()
2025-03-18 20:35:49 +01:00
verity.h
btrfs: add forward declarations and headers, part 1
2024-03-04 16:24:49 +01:00
volumes.c
btrfs: unify ordering of btrfs_key initializations
2025-03-18 20:35:42 +01:00
volumes.h
btrfs: update include and forward declarations in headers
2025-03-18 20:35:43 +01:00
xattr.c
btrfs: xattr: remove unnecessary call to btrfs_mark_buffer_dirty()
2025-01-13 14:53:20 +01:00
xattr.h
btrfs: update include and forward declarations in headers
2025-03-18 20:35:43 +01:00
zlib.c
btrfs: zstd: enable negative compression levels mount option
2025-03-18 20:35:41 +01:00
zoned.c
btrfs: zoned: exit btrfs_can_activate_zone if BTRFS_FS_NEED_ZONE_FINISH is set
2025-03-18 20:35:42 +01:00
zoned.h
btrfs: zoned: reclaim unused zone by zone resetting
2025-01-13 14:53:14 +01:00
zstd.c
btrfs: zstd: remove local variable for storing page offsets
2025-03-18 20:35:42 +01:00