Filipe Manana
2014-Aug-14 11:25 UTC
[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 <fdmanana@suse.com>
---
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 ce02cc9..5e91fb9 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;
--
1.9.1
--
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