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authorQu Wenruo <wqu@suse.com>2019-03-01 10:47:59 +0800
committerDavid Sterba <dsterba@suse.com>2019-04-29 19:02:18 +0200
commit43eb5f2975848743e5b14c5bef20f40d404a7a04 (patch)
tree5f1e88f2b2f823221851a64feee831bed4bd204c /fs/btrfs/extent_io.c
parentbtrfs: switch extent_io_tree::track_uptodate to bool (diff)
downloadlinux-dev-43eb5f2975848743e5b14c5bef20f40d404a7a04.tar.xz
linux-dev-43eb5f2975848743e5b14c5bef20f40d404a7a04.zip
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.c')
-rw-r--r--fs/btrfs/extent_io.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 139f2fe3092f..cfd2b237fd66 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -233,7 +233,8 @@ void __cold extent_io_exit(void)
}
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)
{
tree->fs_info = fs_info;
tree->state = RB_ROOT;
@@ -241,6 +242,7 @@ void extent_io_tree_init(struct btrfs_fs_info *fs_info,
tree->dirty_bytes = 0;
spin_lock_init(&tree->lock);
tree->private_data = private_data;
+ tree->owner = owner;
}
static struct extent_state *alloc_extent_state(gfp_t mask)