korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-24 20:54:10 +08:00
Code Issues Packages Projects Releases Wiki Activity

btrfs: introduce extent allocation policy

Browse Source 
This commit introduces extent allocation policy for btrfs. This policy
controls how btrfs allocate an extents from block groups.  There is no
functional change introduced with this commit.

Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Naohiro Aota 2020-02-25 12:56:16 +09:00 committed by David Sterba
parent 6aafb30384
commit cb2f96f8ab
1 changed files with 8 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
fs/btrfs/extent-tree.c
View File

@ -3427,6 +3427,10 @@ btrfs_release_block_group(struct btrfs_block_group *cache,
btrfs_put_block_group(cache);
}
enum btrfs_extent_allocation_policy {
BTRFS_EXTENT_ALLOC_CLUSTERED,
};
/*
* Structure used internally for find_free_extent() function. Wraps needed
* parameters.
@ -3478,6 +3482,9 @@ struct find_free_extent_ctl {
/* Found result */
u64 found_offset;
/* Allocation policy */
enum btrfs_extent_allocation_policy policy;
};
@ -3815,6 +3822,7 @@ static noinline int find_free_extent(struct btrfs_fs_info *fs_info,
ffe_ctl.have_caching_bg = false;
ffe_ctl.orig_have_caching_bg = false;
ffe_ctl.found_offset = 0;
ffe_ctl.policy = BTRFS_EXTENT_ALLOC_CLUSTERED;
ins->type = BTRFS_EXTENT_ITEM_KEY;
ins->objectid = 0;