leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
199257a78b
linux/fs/btrfs
History
Qu Wenruo 199257a78b btrfs: defrag: don't use merged extent map for their generation check 
For extent maps, if they are not compressed extents and are adjacent by
logical addresses and file offsets, they can be merged into one larger
extent map.

Such merged extent map will have the higher generation of all the
original ones.

But this brings a problem for autodefrag, as it relies on accurate
extent_map::generation to determine if one extent should be defragged.

For merged extent maps, their higher generation can mark some older
extents to be defragged while the original extent map doesn't meet the
minimal generation threshold.

Thus this will cause extra IO.

So solve the problem, here we introduce a new flag, EXTENT_FLAG_MERGED,
to indicate if the extent map is merged from one or more ems.

And for autodefrag, if we find a merged extent map, and its generation
meets the generation requirement, we just don't use this one, and go
back to defrag_get_extent() to read extent maps from subvolume trees.

This could cause more read IO, but should result less defrag data write,
so in the long run it should be a win for autodefrag.

Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2022-02-23 17:43:13 +01:00
..
tests btrfs: selftests: dump extent io tree if extent-io-tree test failed 2022-01-07 14:18:27 +01:00
acl.c overlayfs update for 5.15 2021-09-02 09:21:27 -07:00
async-thread.c btrfs: fix memory ordering between normal and ordered work functions 2021-11-16 16:50:23 +01:00
async-thread.h Btrfs: fix crash during unmount due to race with delayed inode workers 2020-03-23 17:01:51 +01:00
backref.c btrfs: stop accessing ->extent_root directly 2022-01-03 15:09:49 +01:00
backref.h btrfs: remove ignore_offset argument from btrfs_find_all_roots() 2021-08-23 13:19:01 +02:00
block-group.c btrfs: skip reserved bytes warning on unmount after log cleanup failure 2022-01-31 16:06:50 +01:00
block-group.h btrfs: fix deadlock between chunk allocation and chunk btree modifications 2021-10-26 19:08:07 +02:00
block-rsv.c btrfs: reserve extra space for the free space tree 2022-01-07 14:18:25 +01:00
block-rsv.h btrfs: init root block_rsv at init root time 2022-01-03 15:09:48 +01:00
btrfs_inode.h btrfs: only copy dir index keys when logging a directory 2022-01-03 15:09:42 +01:00
check-integrity.c btrfs: check-integrity: stop storing the block device name in btrfsic_dev_state 2021-10-26 19:08:07 +02:00
check-integrity.h btrfs: remove btrfsic_submit_bh() 2020-03-23 17:01:39 +01:00
compression.c btrfs: remove unnecessary parameter type from compression_decompress_bio 2022-01-07 14:18:27 +01:00
compression.h btrfs: determine stripe boundary at bio allocation time in btrfs_submit_compressed_write 2021-10-26 19:08:04 +02:00
ctree.c btrfs: refactor unlock_up 2022-01-07 14:18:26 +01:00
ctree.h btrfs: skip reserved bytes warning on unmount after log cleanup failure 2022-01-31 16:06:50 +01:00
delalloc-space.c btrfs: change root to fs_info for btrfs_reserve_metadata_bytes 2022-01-03 15:09:45 +01:00
delalloc-space.h btrfs: make btrfs_delalloc_reserve_space take btrfs_inode 2020-07-27 12:55:36 +02:00
delayed-inode.c btrfs: add an inode-item.h 2022-01-07 14:18:23 +01:00
delayed-inode.h btrfs: make btrfs_delayed_update_inode take btrfs_inode 2020-12-08 15:54:10 +01:00
delayed-ref.c btrfs: reserve extra space for the free space tree 2022-01-07 14:18:25 +01:00
delayed-ref.h btrfs: make btrfs_ref::real_root optional 2021-10-26 19:08:06 +02:00
dev-replace.c btrfs: remove reada infrastructure 2022-01-07 14:18:26 +01:00
dev-replace.h btrfs: zoned: mark block groups to copy for device-replace 2021-02-09 02:46:07 +01:00
dir-item.c btrfs: drop the _nr from the item helpers 2022-01-03 15:09:43 +01:00
discard.c btrfs: fix typos in comments 2021-06-22 14:11:57 +02:00
discard.h btrfs: cleanup btrfs_discard_update_discardable usage 2020-12-08 15:54:02 +01:00
disk-io.c btrfs: output more debug messages for uncommitted transaction 2022-01-07 14:18:27 +01:00
disk-io.h btrfs: track the csum, extent, and free space trees in a rb tree 2022-01-03 15:09:50 +01:00
export.c btrfs: locking: rip out path->leave_spinning 2020-12-08 15:54:02 +01:00
export.h btrfs: export helpers for subvolume name/id resolution 2020-03-23 17:01:42 +01:00
extent_io.c btrfs: fix argument list that the kdoc format and script verified 2022-01-07 14:18:27 +01:00
extent_io.h btrfs: cleanup for extent_write_locked_range() 2021-10-26 19:08:04 +02:00
extent_map.c btrfs: defrag: don't use merged extent map for their generation check 2022-02-23 17:43:13 +01:00
extent_map.h btrfs: defrag: don't use merged extent map for their generation check 2022-02-23 17:43:13 +01:00
extent-io-tree.h btrfs: use fixed width int type for extent_state::state 2020-12-08 15:54:13 +01:00
extent-tree.c btrfs: zoned: fix chunk allocation condition for zoned allocator 2022-01-07 14:18:26 +01:00
file-item.c btrfs: stop accessing ->csum_root directly 2022-01-03 15:09:49 +01:00
file.c btrfs: fix deadlock due to page faults during direct IO reads and writes 2021-11-09 13:46:07 +01:00
free-space-cache.c btrfs: add inode to truncate control 2022-01-07 14:18:24 +01:00
free-space-cache.h btrfs: change name and type of private member of btrfs_free_space_ctl 2022-01-03 15:09:50 +01:00
free-space-tree.c btrfs: track the csum, extent, and free space trees in a rb tree 2022-01-03 15:09:50 +01:00
free-space-tree.h
inode-item.c btrfs: make should_throttle loop local in btrfs_truncate_inode_items 2022-01-07 14:18:25 +01:00
inode-item.h btrfs: add inode to truncate control 2022-01-07 14:18:24 +01:00
inode.c btrfs: respect the max size in the header when activating swap file 2022-01-07 14:18:27 +01:00
ioctl.c btrfs: defrag: don't use merged extent map for their generation check 2022-02-23 17:43:13 +01:00
Kconfig btrfs: disable build on platforms having page size 256K 2021-06-22 14:11:57 +02:00
locking.c btrfs: fix typos in comments 2021-06-22 14:11:57 +02:00
locking.h btrfs: assert that extent buffers are write locked instead of only locked 2021-10-26 19:08:02 +02:00
lzo.c btrfs: prevent copying too big compressed lzo segment 2022-02-15 19:59:09 +01:00
Makefile btrfs: remove reada infrastructure 2022-01-07 14:18:26 +01:00
misc.h btrfs: use correct header for div_u64 in misc.h 2021-09-07 14:29:50 +02:00
ordered-data.c btrfs: zoned: fix double counting of split ordered extent 2021-09-07 14:30:41 +02:00
ordered-data.h btrfs: remove uptodate parameter from btrfs_dec_test_first_ordered_pending 2021-08-23 13:19:02 +02:00
orphan.c
print-tree.c btrfs: drop the _nr from the item helpers 2022-01-03 15:09:43 +01:00
print-tree.h btrfs: print the actual offset in btrfs_root_name 2021-01-07 17:25:05 +01:00
props.c btrfs: change root to fs_info for btrfs_reserve_metadata_bytes 2022-01-03 15:09:45 +01:00
props.h
qgroup.c btrfs: fix deadlock between quota disable and qgroup rescan worker 2022-01-31 16:05:44 +01:00
qgroup.h btrfs: fix lock inversion problem when doing qgroup extent tracing 2021-07-22 15:50:07 +02:00
raid56.c btrfs: remove btrfs_raid_bio::fs_info member 2021-10-26 19:08:03 +02:00
raid56.h btrfs: remove btrfs_raid_bio::fs_info member 2021-10-26 19:08:03 +02:00
rcu-string.h btrfs: rcu-string: Replace zero-length array with flexible-array member 2020-03-23 17:01:53 +01:00
ref-verify.c btrfs: stop accessing ->extent_root directly 2022-01-03 15:09:49 +01:00
ref-verify.h
reflink.c btrfs: drop the _nr from the item helpers 2022-01-03 15:09:43 +01:00
reflink.h Btrfs: move all reflink implementation code into its own file 2020-03-23 17:01:54 +01:00
relocation.c btrfs: add an inode-item.h 2022-01-07 14:18:23 +01:00
root-tree.c btrfs: change root to fs_info for btrfs_reserve_metadata_bytes 2022-01-03 15:09:45 +01:00
scrub.c btrfs: scrub: cleanup the argument list of scrub_stripe() 2022-01-07 14:18:27 +01:00
send.c btrfs: send: in case of IO error log it 2022-02-09 18:53:26 +01:00
send.h btrfs: send: prepare for v2 protocol 2021-10-29 12:38:43 +02:00
space-info.c btrfs: fix argument list that the kdoc format and script verified 2022-01-07 14:18:27 +01:00
space-info.h btrfs: change root to fs_info for btrfs_reserve_metadata_bytes 2022-01-03 15:09:45 +01:00
struct-funcs.c btrfs: add special case to setget helpers for 64k pages 2021-08-23 13:18:58 +02:00
subpage.c btrfs: handle page locking in btrfs_page_end_writer_lock with no writers 2021-10-26 19:08:05 +02:00
subpage.h btrfs: rework page locking in __extent_writepage() 2021-10-26 19:08:05 +02:00
super.c btrfs: remove reada infrastructure 2022-01-07 14:18:26 +01:00
sysfs.c btrfs: sysfs: add devinfo/fsid to retrieve actual fsid from the device 2022-01-07 14:18:25 +01:00
sysfs.h btrfs: split and refactor btrfs_sysfs_remove_devices_dir 2020-10-07 12:12:21 +02:00
transaction.c btrfs: get rid of warning on transaction commit when using flushoncommit 2022-02-09 18:53:26 +01:00
transaction.h btrfs: fix use-after-free after failure to create a snapshot 2022-01-31 16:06:09 +01:00
tree-checker.c btrfs: tree-checker: check item_size for dev_item 2022-01-31 16:06:04 +01:00
tree-checker.h
tree-defrag.c btrfs: remove unnecessary extent root check in btrfs_defrag_leaves 2022-01-03 15:09:48 +01:00
tree-log.c btrfs: skip reserved bytes warning on unmount after log cleanup failure 2022-01-31 16:06:50 +01:00
tree-log.h btrfs: change error handling for btrfs_delete_*_in_log 2021-10-26 19:08:05 +02:00
tree-mod-log.c btrfs: fix race when picking most recent mod log operation for an old root 2021-04-20 19:27:17 +02:00
tree-mod-log.h btrfs: add and use helper to get lowest sequence number for the tree mod log 2021-04-19 17:25:17 +02:00
ulist.c
ulist.h
uuid-tree.c btrfs: drop the _nr from the item helpers 2022-01-03 15:09:43 +01:00
verity.c btrfs: drop the _nr from the item helpers 2022-01-03 15:09:43 +01:00
volumes.c btrfs: remove reada infrastructure 2022-01-07 14:18:26 +01:00
volumes.h btrfs: remove reada infrastructure 2022-01-07 14:18:26 +01:00
xattr.c btrfs: drop the _nr from the item helpers 2022-01-03 15:09:43 +01:00
xattr.h
zlib.c Revert "btrfs: compression: drop kmap/kunmap from zlib" 2021-10-29 13:03:05 +02:00
zoned.c btrfs: zoned: fix chunk allocation condition for zoned allocator 2022-01-07 14:18:26 +01:00
zoned.h btrfs: zoned: fix chunk allocation condition for zoned allocator 2022-01-07 14:18:26 +01:00
zstd.c lib: zstd: Add kernel-specific API 2021-11-08 16:55:21 -08:00