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author | Qu Wenruo <wqu@suse.com> | 2019-03-01 10:47:59 +0800 |
---|---|---|
committer | David Sterba <dsterba@suse.com> | 2019-04-29 19:02:18 +0200 |
commit | 43eb5f2975848743e5b14c5bef20f40d404a7a04 (patch) | |
tree | 5f1e88f2b2f823221851a64feee831bed4bd204c /fs/btrfs/extent_io.h | |
parent | 7b4397386fbdc606eb053bc2a1cfd985aea59916 (diff) | |
download | linux-43eb5f2975848743e5b14c5bef20f40d404a7a04.tar.bz2 |
btrfs: Introduce extent_io_tree::owner to distinguish different io_trees
Btrfs has the following different extent_io_trees used:
- fs_info::free_extents[2]
- btrfs_inode::io_tree - for both normal inodes and the btree inode
- btrfs_inode::io_failure_tree
- btrfs_transaction::dirty_pages
- btrfs_root::dirty_log_pages
If we want to trace changes in those trees, it will be pretty hard to
distinguish them.
Instead of using hard-to-read pointer address, this patch will introduce
a new member extent_io_tree::owner to track the owner.
This modification needs all the callers of extent_io_tree_init() to
accept a new parameter @owner.
This patch provides the basis for later trace events.
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/extent_io.h')
-rw-r--r-- | fs/btrfs/extent_io.h | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h index bd5c12599057..aef7a46b1e61 100644 --- a/fs/btrfs/extent_io.h +++ b/fs/btrfs/extent_io.h @@ -106,12 +106,27 @@ struct extent_io_ops { int mirror); }; +enum { + IO_TREE_FS_INFO_FREED_EXTENTS0, + IO_TREE_FS_INFO_FREED_EXTENTS1, + IO_TREE_INODE_IO, + IO_TREE_INODE_IO_FAILURE, + IO_TREE_RELOC_BLOCKS, + IO_TREE_TRANS_DIRTY_PAGES, + IO_TREE_ROOT_DIRTY_LOG_PAGES, + IO_TREE_SELFTEST, +}; + struct extent_io_tree { struct rb_root state; struct btrfs_fs_info *fs_info; void *private_data; u64 dirty_bytes; bool track_uptodate; + + /* Who owns this io tree, should be one of IO_TREE_* */ + u8 owner; + spinlock_t lock; const struct extent_io_ops *ops; }; @@ -241,7 +256,8 @@ typedef struct extent_map *(get_extent_t)(struct btrfs_inode *inode, int create); void extent_io_tree_init(struct btrfs_fs_info *fs_info, - struct extent_io_tree *tree, void *private_data); + struct extent_io_tree *tree, unsigned int owner, + void *private_data); int try_release_extent_mapping(struct page *page, gfp_t mask); int try_release_extent_buffer(struct page *page); int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |