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btrfs: Pack struct btrfs_device

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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@gmail.com>
Reviewed-by: Zach Brown <zab@redhat.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
This commit is contained in:
Dulshani Gunawardhana 2013-10-31 09:57:33 +05:30 committed by Chris Mason
parent 95e94d14b4
commit 3c45bfc152
1 changed files with 10 additions and 10 deletions
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20
fs/btrfs/volumes.h
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@ -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 */