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linux/fs/btrfs
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Goldwyn Rodrigues 3eb81bbf4e btrfs: simplify inode locking for RWF_NOWAIT 
commit 9cf35f6735 upstream.

This is similar to 942491c9e6 ("xfs: fix AIM7 regression"). Apparently
our current rwsem code doesn't like doing the trylock, then lock for
real scheme. This causes extra contention on the lock and can be
measured eg. by AIM7 benchmark.  So change our read/write methods to
just do the trylock for the RWF_NOWAIT case.

Fixes: edf064e7c6 ("btrfs: nowait aio support")
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ update changelog ]
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-17 19:48:32 +01:00
..
tests
btrfs: return error pointer from alloc_test_extent_buffer
2019-12-31 16:41:57 +01:00
acl.c
btrfs: cleanup btrfs_setxattr_trans and drop transaction parameter
2019-04-29 19:02:44 +02:00
async-thread.c
btrfs: get rid of unique workqueue helper functions
2020-01-09 10:20:06 +01:00
async-thread.h
btrfs: get rid of unique workqueue helper functions
2020-01-09 10:20:06 +01:00
backref.c
Btrfs: fix deadlock between fiemap and transaction commits
2019-07-30 18:25:12 +02:00
backref.h
btrfs: fiemap: preallocate ulists for btrfs_check_shared
2019-07-01 13:34:53 +02:00
block-group.c
btrfs: get rid of unique workqueue helper functions
2020-01-09 10:20:06 +01:00
block-group.h
btrfs: move struct io_ctl to free-space-cache.h
2019-09-09 14:59:15 +02:00
block-rsv.c
btrfs: use btrfs_try_granting_tickets in update_global_rsv
2019-09-09 14:59:19 +02:00
block-rsv.h
btrfs: migrate the global_block_rsv helpers to block-rsv.c
2019-07-02 12:30:55 +02:00
btrfs_inode.h
btrfs: remove assumption about csum type form btrfs_print_data_csum_error()
2019-07-01 13:35:02 +02:00
check-integrity.c
btrfs: reduce stack usage for btrfsic_process_written_block
2019-09-09 14:58:58 +02:00
check-integrity.h
btrfs: replace GPL boilerplate by SPDX -- headers
2018-04-12 16:29:46 +02:00
compression.c
btrfs: move cond_wake_up functions out of ctree
2019-09-09 14:59:15 +02:00
compression.h
btrfs: compression: replace set_level callbacks by a common helper
2019-09-09 14:59:11 +02:00
ctree.c
Btrfs: fix removal logic of the tree mod log that leads to use-after-free issues
2019-12-31 16:42:07 +01:00
ctree.h
Btrfs: fix missing data checksums after replaying a log tree
2019-12-31 16:41:58 +01:00
delalloc-space.c
Btrfs: fix qgroup double free after failure to reserve metadata for delalloc
2019-10-17 20:13:44 +02:00
delalloc-space.h
btrfs: migrate the delalloc space stuff to it's own home
2019-07-04 17:26:17 +02:00
delayed-inode.c
btrfs: get rid of unique workqueue helper functions
2020-01-09 10:20:06 +01:00
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: rename btrfs_space_info_add_old_bytes
2019-09-09 14:59:18 +02:00
delayed-ref.h
btrfs: migrate the delayed refs rsv code
2019-07-04 17:26:17 +02:00
dev-replace.c
btrfs: move cond_wake_up functions out of ctree
2019-09-09 14:59:15 +02:00
dev-replace.h
btrfs: get fs_info from trans in btrfs_run_dev_replace
2019-04-29 19:02:43 +02:00
dir-item.c
btrfs: remove unused parameter fs_info from btrfs_extend_item
2019-04-29 19:02:50 +02:00
disk-io.c
btrfs: get rid of unique workqueue helper functions
2020-01-09 10:20:06 +01:00
disk-io.h
btrfs: Make reada_tree_block_flagged private
2019-09-09 14:59:11 +02:00
export.c
btrfs: Remove 'objectid' member from struct btrfs_root
2018-10-15 17:23:25 +02:00
export.h
btrfs: replace GPL boilerplate by SPDX -- headers
2018-04-12 16:29:46 +02:00
extent_io.c
Btrfs: only associate the locked page with one async_chunk struct
2020-01-09 10:20:06 +01:00
extent_io.h
btrfs: Remove delalloc_end argument from extent_clear_unlock_delalloc
2019-09-09 14:58:59 +02:00
extent_map.c
btrfs: assert extent map tree lock in add_extent_mapping
2019-09-09 14:59:00 +02:00
extent_map.h
btrfs: Remove impossible condition from mergable_maps
2019-02-25 14:13:21 +01:00
extent-tree.c
btrfs: handle error in btrfs_cache_block_group
2020-01-12 12:21:30 +01:00
file-item.c
Btrfs: fix missing data checksums after replaying a log tree
2019-12-31 16:41:58 +01:00
file.c
btrfs: simplify inode locking for RWF_NOWAIT
2020-01-17 19:48:32 +01:00
free-space-cache.c
btrfs: check page->mapping when loading free space cache
2019-12-17 19:56:02 +01:00
free-space-cache.h
btrfs: move struct io_ctl to free-space-cache.h
2019-09-09 14:59:15 +02:00
free-space-tree.c
btrfs: move basic block_group definitions to their own header
2019-09-09 14:59:03 +02:00
free-space-tree.h
btrfs: move basic block_group definitions to their own header
2019-09-09 14:59:03 +02:00
inode-item.c
btrfs: Make btrfs_find_name_in_ext_backref return struct btrfs_inode_extref
2019-09-09 14:59:16 +02:00
inode-map.c
btrfs: qgroup: Always free PREALLOC META reserve in btrfs_delalloc_release_extents()
2019-10-15 18:50:07 +02:00
inode-map.h
btrfs: replace GPL boilerplate by SPDX -- headers
2018-04-12 16:29:46 +02:00
inode.c
Btrfs: only associate the locked page with one async_chunk struct
2020-01-09 10:20:06 +01:00
ioctl.c
Btrfs: fix hole extent items with a zero size after range cloning
2020-01-12 12:21:30 +01:00
Kconfig
btrfs: Fix build error while LIBCRC32C is module
2019-07-17 17:03:30 +02:00
locking.c
btrfs: move cond_wake_up functions out of ctree
2019-09-09 14:59:15 +02:00
locking.h
btrfs: Remove unused locking functions
2019-09-09 14:58:59 +02:00
lzo.c
btrfs: compression: replace set_level callbacks by a common helper
2019-09-09 14:59:11 +02:00
Makefile
btrfs: migrate the block group lookup code
2019-09-09 14:59:04 +02:00
misc.h
btrfs: move math functions to misc.h
2019-09-09 14:59:15 +02:00
ordered-data.c
btrfs: get rid of unique workqueue helper functions
2020-01-09 10:20:06 +01:00
ordered-data.h
btrfs: don't assume ordered sums to be 4 bytes
2019-07-01 13:35:00 +02:00
orphan.c
btrfs: replace GPL boilerplate by SPDX -- sources
2018-04-12 16:29:51 +02:00
print-tree.c
btrfs: switch extent_buffer write_locks from atomic to int
2019-07-02 12:30:47 +02:00
print-tree.h
btrfs: print-tree: debugging output enhancement
2018-04-20 19:18:16 +02:00
props.c
btrfs: rename the btrfs_calc_*_metadata_size helpers
2019-09-09 14:59:13 +02:00
props.h
btrfs: delete unused function btrfs_set_prop_trans
2019-04-29 19:02:54 +02:00
qgroup.c
btrfs: Fix error messages in qgroup_rescan_init
2020-01-12 12:21:29 +01:00
qgroup.h
btrfs: qgroup: Move reserved data accounting from btrfs_delayed_ref_head to btrfs_qgroup_extent_record
2019-02-25 14:13:39 +01:00
raid56.c
btrfs: get rid of unique workqueue helper functions
2020-01-09 10:20:06 +01:00
raid56.h
btrfs: constify map parameter for nr_parity_stripes and nr_data_stripes
2019-07-01 13:34:58 +02:00
rcu-string.h
btrfs: replace GPL boilerplate by SPDX -- headers
2018-04-12 16:29:46 +02:00
reada.c
btrfs: get rid of unique workqueue helper functions
2020-01-09 10:20:06 +01:00
ref-verify.c
btrfs: fix uninitialized ret in ref-verify
2019-10-03 15:00:56 +02:00
ref-verify.h
btrfs: ref-verify: Use btrfs_ref to refactor btrfs_ref_tree_mod()
2019-04-29 19:02:49 +02:00
relocation.c
btrfs: do not leak reloc root if we fail to read the fs root
2019-12-31 16:42:04 +01:00
root-tree.c
btrfs: rename the btrfs_calc_*_metadata_size helpers
2019-09-09 14:59:13 +02:00
scrub.c
btrfs: get rid of unique workqueue helper functions
2020-01-09 10:20:06 +01:00
send.c
btrfs: send: remove WARN_ON for readonly mount
2019-12-31 16:41:59 +01:00
send.h
btrfs: replace GPL boilerplate by SPDX -- headers
2018-04-12 16:29:46 +02:00
space-info.c
Btrfs: fix race leading to metadata space leak after task received signal
2019-10-25 19:11:34 +02:00
space-info.h
btrfs: rename btrfs_space_info_add_old_bytes
2019-09-09 14:59:18 +02:00
struct-funcs.c
btrfs: tie extent buffer and it's token together
2019-09-09 14:59:16 +02:00
super.c
btrfs: move sysfs declarations out of ctree.h
2019-09-09 14:59:06 +02:00
sysfs.c
btrfs: sysfs: move helper macros to sysfs.c
2019-09-09 14:59:08 +02:00
sysfs.h
btrfs: sysfs: move helper macros to sysfs.c
2019-09-09 14:59:08 +02:00
transaction.c
btrfs: move cond_wake_up functions out of ctree
2019-09-09 14:59:15 +02:00
transaction.h
Btrfs: fix deadlock between fiemap and transaction commits
2019-07-30 18:25:12 +02:00
tree-checker.c
Btrfs: make tree checker detect checksum items with overlapping ranges
2019-12-31 16:41:55 +01:00
tree-checker.h
btrfs: get fs_info from eb in btrfs_check_chunk_valid
2019-04-29 19:02:39 +02:00
tree-defrag.c
btrfs: open code now trivial btrfs_set_lock_blocking
2019-02-25 14:13:27 +01:00
tree-log.c
btrfs: skip log replay on orphaned roots
2019-12-31 16:42:03 +01:00
tree-log.h
btrfs: get fs_info from trans in btrfs_set_log_full_commit
2019-04-29 19:02:41 +02:00
ulist.c
btrfs: replace GPL boilerplate by SPDX -- sources
2018-04-12 16:29:51 +02:00
ulist.h
btrfs: replace GPL boilerplate by SPDX -- headers
2018-04-12 16:29:46 +02:00
uuid-tree.c
btrfs: handle ENOENT in btrfs_uuid_tree_iterate
2019-12-31 16:42:05 +01:00
volumes.c
btrfs: get rid of unique workqueue helper functions
2020-01-09 10:20:06 +01:00
volumes.h
btrfs: Remove btrfs_bio::flags member
2019-12-17 19:56:06 +01:00
xattr.c
Btrfs: fix failure to persist compression property xattr deletion on fsync
2019-06-17 16:37:17 +02:00
xattr.h
btrfs: cleanup btrfs_setxattr_trans and drop transaction parameter
2019-04-29 19:02:44 +02:00
zlib.c
btrfs: compression: replace set_level callbacks by a common helper
2019-09-09 14:59:11 +02:00
zstd.c
btrfs: move cond_wake_up functions out of ctree
2019-09-09 14:59:15 +02:00