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Btrfs: use signed integer instead of unsigned long integer for log transid

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The log trans id is initialized to be 0 every time we create a log tree,
and the log tree need be re-created after a new transaction is started,
it means the log trans id is unlikely to be a huge number, so we can use
signed integer instead of unsigned long integer to save a bit space.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fb.com>
This commit is contained in:
Miao Xie
2014-02-20 18:08:56 +08:00
committed by Josef Bacik
parent 7483e1a446
commit bb14a59b61
3 changed files with 12 additions and 12 deletions
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16
fs/btrfs/btrfs_inode.h
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@@ -108,16 +108,19 @@ struct btrfs_inode {
*/
u64 last_trans;
/*
* log transid when this inode was last modified
*/
u64 last_sub_trans;
/*
* transid that last logged this inode
*/
u64 logged_trans;
/*
* log transid when this inode was last modified
*/
int last_sub_trans;
/* a local copy of root's last_log_commit */
int last_log_commit;
/* total number of bytes pending delalloc, used by stat to calc the
* real block usage of the file
*/
@@ -155,9 +158,6 @@ struct btrfs_inode {
/* flags field from the on disk inode */
u32 flags;
/* a local copy of root's last_log_commit */
unsigned long last_log_commit;
/*
* Counters to keep track of the number of extent item's we may use due
* to delalloc and such. outstanding_extents is the number of extent