Currently btrfs_inode have size equal 1136 bytes. (On x86_64). struct btrfs_inode store several vars releated to compression code, all states use 1 or 2 bits.
Lets declare bitfields for compression releated vars, to reduce sizeof btrfs_inode to 1128 bytes. Signed-off-by: Timofey Titovets <nefelim...@gmail.com> --- fs/btrfs/btrfs_inode.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/fs/btrfs/btrfs_inode.h b/fs/btrfs/btrfs_inode.h index 9eb0c92ee4b4..9d29d7e68757 100644 --- a/fs/btrfs/btrfs_inode.h +++ b/fs/btrfs/btrfs_inode.h @@ -181,13 +181,13 @@ struct btrfs_inode { /* * Cached values of inode properties */ - unsigned prop_compress; /* per-file compression algorithm */ + unsigned prop_compress : 2; /* per-file compression algorithm */ /* * Force compression on the file using the defrag ioctl, could be * different from prop_compress and takes precedence if set */ - unsigned defrag_compress; - unsigned change_compress; + unsigned defrag_compress : 2; + unsigned change_compress : 1; struct btrfs_delayed_node *delayed_node; -- 2.15.1 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html