btrfs: use btrfs_read_extent_buffer() in do_walk_down()

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Currently if our extent buffer isn't uptodate we will drop the lock,
free it, and then call read_tree_block() for the bytenr.  This is
inefficient, we already have the extent buffer, we can simply call
btrfs_read_extent_buffer().

Merge these two cases down into one if statement, if we are not uptodate
we can drop the lock, trigger readahead, and do the read using
btrfs_read_extent_buffer(), and carry on.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

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Josef Bacik 2024-05-07 14:12:04 -04:00 • committed by David Sterba

parent 133b3da835

commit 3fdf5798fa

1 changed files with 4 additions and 11 deletions

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fs/btrfs/extent-tree.c

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