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Commit 2a39e598 authored by Filipe Manana's avatar Filipe Manana Committed by Chris Mason
Browse files

Btrfs: shrink further sizeof(struct extent_buffer) 



The map_start and map_len fields aren't used anywhere, so just remove
them. On a x86_64 system, this reduced sizeof(struct extent_buffer)
from 296 bytes to 280 bytes, and therefore 14 extent_buffer structs can
now fit into a page instead of 13.

Signed-off-by: default avatarFilipe Manana <fdmanana@suse.com>
Reviewed-by: default avatarDavid Sterba <dsterba@suse.cz>
Signed-off-by: default avatarChris Mason <clm@fb.com>
parent 4395e0c4

fs/btrfs/extent_io.h

+0 −2
Original line number Diff line number Diff line
@@ -125,8 +125,6 @@ struct extent_state { 
struct extent_buffer {

	u64 start;

	unsigned long len;

	unsigned long map_start;

	unsigned long map_len;

	unsigned long bflags;

	struct btrfs_fs_info *fs_info;

	spinlock_t refs_lock;