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(parent: 71c086b) | patch
btrfs: add comment for optimization in free_extent_buffer()
authorFilipe Manana <fdmanana@suse.com>
Mon, 2 Jun 2025 12:46:23 +0000 (13:46 +0100)
committerDavid Sterba <dsterba@suse.com>
Mon, 21 Jul 2025 21:53:30 +0000 (23:53 +0200)
commit2697b6159744e5afae0f7715da9f830ba6f9e45a
treee8f38fb2dbcbc2a0bd38ce2b7fb0f44cdab04c3dtree
parent71c086b30d4373a01bd5627f54516a72891a026acommit | diff
btrfs: add comment for optimization in free_extent_buffer()

There's this special atomic compare and exchange logic which serves to
avoid locking the extent buffers refs_lock spinlock and therefore reduce
lock contention, so add a comment to make it more obvious.

Reviewed-by: Boris Burkov <boris@bur.io>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
fs/btrfs/extent_io.c diff | blob | blame | history
Linux 6.x block layer and io_uring tree(s)