Commit 46fefe41 authored Jun 16, 2014 by Filipe Manana Committed by Chris Mason Jun 19, 2014

Btrfs: remove unused wait queue in struct extent_buffer



The lock_wq wait queue is not used anywhere, therefore just remove it.
On a x86_64 system, this reduced sizeof(struct extent_buffer) from 320
bytes down to 296 bytes, which means a 4Kb page can now be used for
13 extent buffers instead of 12.

Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com>
Signed-off-by: Chris Mason <clm@fb.com>

parent ea4ebde0

fs/btrfs/extent_io.h

+0 −1

Original line number	Diff line number	Diff line
		@@ -158,7 +158,6 @@ struct extent_buffer {
		* to unlock
		*/
		wait_queue_head_t read_lock_wq;
		wait_queue_head_t lock_wq;
		struct page *pages[INLINE_EXTENT_BUFFER_PAGES];
		#ifdef CONFIG_BTRFS_DEBUG
		struct list_head leak_list;

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