From 2a39e5980257c77f48b5c31f9fb483a72a03b213 Mon Sep 17 00:00:00 2001 From: Filipe Manana Date: Thu, 14 Aug 2014 12:25:14 +0100 Subject: [PATCH] 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: Filipe Manana Reviewed-by: David Sterba Signed-off-by: Chris Mason --- fs/btrfs/extent_io.h | 2 -- 1 file changed, 2 deletions(-) diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h index 1f608166fe67..844b4c5029cd 100644 --- a/fs/btrfs/extent_io.h +++ b/fs/btrfs/extent_io.h @@ -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; -- 2.39.5