Pack the structure btrfs_device in volumes.h to eliminate holes detected
by pahole, thus reducing binary memory footprint.
Signed-off-by: Dulshani Gunawardhana <dulshani.gunawardhana89@xxxxxxxxx>
Reviewed-by: Zach Brown <zab@xxxxxxxxxx>
---
fs/btrfs/volumes.h | 20 ++++++++++----------
1 file changed, 10 insertions(+), 10 deletions(-)
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index b72f540..8d939ea 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -43,9 +43,8 @@ struct btrfs_device {
/* WRITE_SYNC bios */
struct btrfs_pending_bios pending_sync_bios;
- int running_pending;
u64 generation;
-
+ int running_pending;
int writeable;
int in_fs_metadata;
int missing;
@@ -53,11 +52,11 @@ struct btrfs_device {
int is_tgtdev_for_dev_replace;
spinlock_t io_lock;
+ /* the mode sent to blkdev_get */
+ fmode_t mode;
struct block_device *bdev;
- /* the mode sent to blkdev_get */
- fmode_t mode;
struct rcu_string *name;
@@ -78,16 +77,21 @@ struct btrfs_device {
/* optimal io width for this device */
u32 io_width;
+ /* type and info about this device */
+ u64 type;
/* minimal io size for this device */
u32 sector_size;
- /* type and info about this device */
- u64 type;
/* physical drive uuid (or lvm uuid) */
u8 uuid[BTRFS_UUID_SIZE];
+ /* for sending down flush barriers */
+ int nobarriers;
+ struct bio *flush_bio;
+ struct completion flush_wait;
+
/* per-device scrub information */
struct scrub_ctx *scrub_device;
@@ -103,10 +107,6 @@ struct btrfs_device {
struct radix_tree_root reada_zones;
struct radix_tree_root reada_extents;
- /* for sending down flush barriers */
- struct bio *flush_bio;
- struct completion flush_wait;
- int nobarriers;
/* disk I/O failure stats. For detailed description refer to
* enum btrfs_dev_stat_values in ioctl.h */
--
1.8.1.2
--
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