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5ca1949b79
linux/fs/btrfs
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Filipe Manana 5ca1949b79 btrfs: remove pointless barrier from btrfs_sync_file() 
The memory barrier (smp_mb()) at btrfs_sync_file() is completely redundant
now that fs_info->last_trans_committed is read using READ_ONCE(), with the
helper btrfs_get_last_trans_committed(), and written using WRITE_ONCE()
with the helper btrfs_set_last_trans_committed().

This barrier was introduced in 2011, by commit a4abeea41a ("Btrfs: kill
trans_mutex"), but even back then it was not correct since the writer side
(in btrfs_commit_transaction()), did not issue a pairing memory barrier
after it updated fs_info->last_trans_committed.

So remove this barrier.

Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2023-10-12 16:44:18 +02:00
..
tests btrfs: abort transaction on generation mismatch when marking eb as dirty 2023-10-12 16:44:07 +02:00
accessors.c
accessors.h btrfs: qgroup: check generation when recording simple quota delta 2023-10-12 16:44:11 +02:00
acl.c fs: port acl to mnt_idmap 2023-01-19 09:24:28 +01:00
acl.h fs: port ->set_acl() to pass mnt_idmap 2023-01-19 09:24:27 +01:00
async-thread.c btrfs: merge ordered work callbacks in btrfs_work into one 2023-10-12 16:44:10 +02:00
async-thread.h btrfs: merge ordered work callbacks in btrfs_work into one 2023-10-12 16:44:10 +02:00
backref.c btrfs: switch btrfs_backref_cache::is_reloc to bool 2023-10-12 16:44:13 +02:00
backref.h btrfs: switch btrfs_backref_cache::is_reloc to bool 2023-10-12 16:44:13 +02:00
bio.c btrfs: merge ordered work callbacks in btrfs_work into one 2023-10-12 16:44:10 +02:00
bio.h btrfs: add an ordered_extent pointer to struct btrfs_bio 2023-06-19 13:59:36 +02:00
block-group.c btrfs: stop reserving excessive space for block group item insertions 2023-10-12 16:44:16 +02:00
block-group.h btrfs: rename add_new_free_space() to btrfs_add_new_free_space() 2023-08-21 14:52:12 +02:00
block-rsv.c btrfs: read raid stripe tree from disk 2023-10-12 16:44:09 +02:00
block-rsv.h btrfs: move btrfs_check_trunc_cache_free_space into block-rsv.c 2023-06-19 13:59:24 +02:00
btrfs_inode.h btrfs: add and use helpers for reading and writing last_log_commit 2023-10-12 16:44:17 +02:00
compression.c btrfs: rename errno identifiers to error 2023-10-12 16:44:07 +02:00
compression.h btrfs: pass an ordered_extent to btrfs_submit_compressed_write 2023-06-19 13:59:36 +02:00
ctree.c btrfs: move btrfs_realloc_node() from ctree.c into defrag.c 2023-10-12 16:44:14 +02:00
ctree.h btrfs: add and use helpers for reading and writing log_transid 2023-10-12 16:44:17 +02:00
defrag.c btrfs: add specific helper for range bit test exists 2023-10-12 16:44:14 +02:00
defrag.h btrfs: move btrfs_defrag_root() to defrag.{c,h} 2023-10-12 16:44:13 +02:00
delalloc-space.c btrfs: don't arbitrarily slow down delalloc if we're committing 2023-10-12 16:44:08 +02:00
delalloc-space.h
delayed-inode.c btrfs: remove redundant root argument from btrfs_delayed_update_inode() 2023-10-12 16:44:12 +02:00
delayed-inode.h btrfs: remove redundant root argument from btrfs_delayed_update_inode() 2023-10-12 16:44:12 +02:00
delayed-ref.c btrfs: stop reserving excessive space for block group item insertions 2023-10-12 16:44:16 +02:00
delayed-ref.h btrfs: stop reserving excessive space for block group item insertions 2023-10-12 16:44:16 +02:00
dev-replace.c btrfs: abort transaction on generation mismatch when marking eb as dirty 2023-10-12 16:44:07 +02:00
dev-replace.h
dir-item.c btrfs: abort transaction on generation mismatch when marking eb as dirty 2023-10-12 16:44:07 +02:00
dir-item.h btrfs: add fscrypt related dependencies to respective headers 2023-10-12 16:44:02 +02:00
discard.c btrfs: unexport btrfs_run_discard_work and make it static 2023-06-19 13:59:25 +02:00
discard.h btrfs: unexport btrfs_run_discard_work and make it static 2023-06-19 13:59:25 +02:00
disk-io.c btrfs: add and use helpers for reading and writing last_trans_committed 2023-10-12 16:44:17 +02:00
disk-io.h btrfs: abort transaction on generation mismatch when marking eb as dirty 2023-10-12 16:44:07 +02:00
export.c
export.h
extent_io.c btrfs: change test_range_bit to scan the whole range 2023-10-12 16:44:14 +02:00
extent_io.h btrfs: move extent_buffer::lock_owner to debug section 2023-10-12 16:44:05 +02:00
extent_map.c btrfs: fix incorrect splitting in btrfs_drop_extent_map_range 2023-08-18 14:38:10 +02:00
extent_map.h btrfs: pass the new logical address to split_extent_map 2023-06-19 13:59:33 +02:00
extent-io-tree.c btrfs: make sure we cache next state in find_first_extent_bit() 2023-10-12 16:44:15 +02:00
extent-io-tree.h btrfs: make wait_extent_bit() static 2023-10-12 16:44:15 +02:00
extent-tree.c btrfs: track data relocation with simple quota 2023-10-12 16:44:12 +02:00
extent-tree.h btrfs: qgroup: track metadata relocation COW with simple quota 2023-10-12 16:44:12 +02:00
file-item.c btrfs: abort transaction on generation mismatch when marking eb as dirty 2023-10-12 16:44:07 +02:00
file-item.h btrfs: scrub: avoid unnecessary csum tree search preparing stripes 2023-08-21 14:54:48 +02:00
file.c btrfs: remove pointless barrier from btrfs_sync_file() 2023-10-12 16:44:18 +02:00
file.h
free-space-cache.c btrfs: remove redundant root argument from btrfs_update_inode() 2023-10-12 16:44:12 +02:00
free-space-cache.h btrfs: move btrfs_check_trunc_cache_free_space into block-rsv.c 2023-06-19 13:59:24 +02:00
free-space-tree.c btrfs: abort transaction on generation mismatch when marking eb as dirty 2023-10-12 16:44:07 +02:00
free-space-tree.h btrfs: make clear_cache mount option to rebuild FST without disabling it 2023-05-10 14:51:27 +02:00
fs.c btrfs: sysfs: update fs features directory asynchronously 2023-02-13 17:50:35 +01:00
fs.h btrfs: add and use helpers for reading and writing last_trans_committed 2023-10-12 16:44:17 +02:00
inode-item.c btrfs: track owning root in btrfs_ref 2023-10-12 16:44:11 +02:00
inode-item.h btrfs: add fscrypt related dependencies to respective headers 2023-10-12 16:44:02 +02:00
inode.c btrfs: add and use helpers for reading and writing fs_info->generation 2023-10-12 16:44:17 +02:00
ioctl.c btrfs: add and use helpers for reading and writing last_trans_committed 2023-10-12 16:44:17 +02:00
ioctl.h fs: port ->fileattr_set() to pass mnt_idmap 2023-01-19 09:24:27 +01:00
Kconfig btrfs: check-integrity: remove CONFIG_BTRFS_FS_CHECK_INTEGRITY option 2023-10-12 16:44:05 +02:00
locking.c btrfs: add raid stripe tree definitions 2023-10-12 16:44:09 +02:00
locking.h btrfs: do not block starts waiting on previous transaction commit 2023-09-08 14:10:49 +02:00
lru_cache.c btrfs: send: cache utimes operations for directories if possible 2023-02-15 19:38:50 +01:00
lru_cache.h btrfs: remove btrfs_lru_cache_is_full() inline function 2023-04-17 18:01:18 +02:00
lzo.c btrfs: disable allocation warnings for compression workspaces 2023-06-19 13:59:34 +02:00
Makefile btrfs: add support for inserting raid stripe extents 2023-10-12 16:44:09 +02:00
messages.c btrfs: rename errno identifiers to error 2023-10-12 16:44:07 +02:00
messages.h btrfs: rename errno identifiers to error 2023-10-12 16:44:07 +02:00
misc.h minmax: add in_range() macro 2023-08-24 16:20:18 -07:00
ordered-data.c btrfs: open code btrfs_ordered_inode_tree in btrfs_inode 2023-10-12 16:44:16 +02:00
ordered-data.h btrfs: open code btrfs_ordered_inode_tree in btrfs_inode 2023-10-12 16:44:16 +02:00
orphan.c
orphan.h
print-tree.c btrfs: new inline ref storing owning subvol of data extents 2023-10-12 16:44:11 +02:00
print-tree.h btrfs: print-tree: pass const extent buffer pointer 2023-06-19 13:59:22 +02:00
props.c btrfs: move btrfs_name_hash to dir-item.h 2023-10-12 16:44:02 +02:00
props.h
qgroup.c btrfs: qgroup: only set QUOTA_ENABLED when done reading qgroups 2023-10-12 16:44:12 +02:00
qgroup.h btrfs: qgroup: check generation when recording simple quota delta 2023-10-12 16:44:11 +02:00
raid56.c btrfs: scrub: avoid unnecessary csum tree search preparing stripes 2023-08-21 14:54:48 +02:00
raid56.h btrfs: raid56: remove unused BTRFS_RBIO_REBUILD_MISSING 2023-08-21 14:52:12 +02:00
raid-stripe-tree.c btrfs: tracepoints: add events for raid stripe tree 2023-10-12 16:44:10 +02:00
raid-stripe-tree.h btrfs: zoned: support RAID0/1/10 on top of raid stripe tree 2023-10-12 16:44:09 +02:00
rcu-string.h
ref-verify.c btrfs: new inline ref storing owning subvol of data extents 2023-10-12 16:44:11 +02:00
ref-verify.h
reflink.c btrfs: remove redundant root argument from btrfs_update_inode() 2023-10-12 16:44:12 +02:00
reflink.h
relocation.c btrfs: change test_range_bit to scan the whole range 2023-10-12 16:44:14 +02:00
relocation.h btrfs: relocation: constify parameters where possible 2023-10-12 16:44:13 +02:00
root-tree.c btrfs: qgroup: add new quota mode for simple quotas 2023-10-12 16:44:10 +02:00
root-tree.h btrfs: drop __must_check annotations 2023-10-12 16:44:04 +02:00
scrub.c btrfs: add and use helpers for reading and writing last_trans_committed 2023-10-12 16:44:17 +02:00
scrub.h btrfs: scrub: remove scrub_bio structure 2023-04-17 18:01:24 +02:00
send.c btrfs: remove btrfs_crc32c wrapper 2023-10-12 16:44:02 +02:00
send.h
space-info.c btrfs: adjust overcommit logic when very close to full 2023-10-12 16:44:16 +02:00
space-info.h btrfs: pass a space_info argument to btrfs_reserve_metadata_bytes() 2023-10-12 16:44:05 +02:00
subpage.c btrfs: stop setting PageError in the data I/O path 2023-06-19 13:59:35 +02:00
subpage.h btrfs: stop setting PageError in the data I/O path 2023-06-19 13:59:35 +02:00
super.c btrfs: add and use helpers for reading and writing last_trans_committed 2023-10-12 16:44:17 +02:00
super.h
sysfs.c btrfs: add and use helpers for reading and writing fs_info->generation 2023-10-12 16:44:17 +02:00
sysfs.h btrfs: sysfs: update fs features directory asynchronously 2023-02-13 17:50:35 +01:00
transaction.c btrfs: add and use helpers for reading and writing last_trans_committed 2023-10-12 16:44:17 +02:00
transaction.h btrfs: add and use helpers for reading and writing log_transid 2023-10-12 16:44:17 +02:00
tree-checker.c btrfs: add and use helpers for reading and writing last_trans_committed 2023-10-12 16:44:17 +02:00
tree-checker.h btrfs: move btrfs_verify_level_key into tree-checker.c 2023-06-19 13:59:25 +02:00
tree-log.c btrfs: add and use helpers for reading and writing log_transid 2023-10-12 16:44:17 +02:00
tree-log.h btrfs: change for_rename argument of btrfs_record_unlink_dir() to bool 2023-06-19 13:59:26 +02:00
tree-mod-log.c btrfs: avoid tree mod log ENOMEM failures when we don't need to log 2023-06-19 13:59:38 +02:00
tree-mod-log.h
ulist.c btrfs: reformat remaining kdoc style comments 2023-10-12 16:44:04 +02:00
ulist.h
uuid-tree.c btrfs: abort transaction on generation mismatch when marking eb as dirty 2023-10-12 16:44:07 +02:00
uuid-tree.h
verity.c btrfs: remove redundant root argument from btrfs_update_inode() 2023-10-12 16:44:12 +02:00
verity.h
volumes.c btrfs: support cloned-device mount capability 2023-10-12 16:44:17 +02:00
volumes.h btrfs: support cloned-device mount capability 2023-10-12 16:44:17 +02:00
xattr.c btrfs: remove redundant root argument from btrfs_update_inode() 2023-10-12 16:44:12 +02:00
xattr.h
zlib.c btrfs: disable allocation warnings for compression workspaces 2023-06-19 13:59:34 +02:00
zoned.c btrfs: zoned: support RAID0/1/10 on top of raid stripe tree 2023-10-12 16:44:09 +02:00
zoned.h btrfs: zoned: reserve zones for an active metadata/system block group 2023-08-21 14:52:19 +02:00
zstd.c btrfs: reformat remaining kdoc style comments 2023-10-12 16:44:04 +02:00