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 <[email protected]> --- fs/btrfs/btrfs_inode.h | 14 +++++++------- fs/btrfs/ctree.h | 4 ++-- fs/btrfs/tree-log.c | 4 ++-- 3 files changed, 11 insertions(+), 11 deletions(-) diff --git a/fs/btrfs/btrfs_inode.h b/fs/btrfs/btrfs_inode.h index 8fed212..c9a2444 100644 --- a/fs/btrfs/btrfs_inode.h +++ b/fs/btrfs/btrfs_inode.h @@ -109,14 +109,17 @@ struct btrfs_inode { u64 last_trans; /* - * log transid when this inode was last modified + * transid that last logged this inode */ - u64 last_sub_trans; + u64 logged_trans; /* - * transid that last logged this inode + * log transid when this inode was last modified */ - u64 logged_trans; + 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 diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index c45a10a..76b6bff 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -1742,8 +1742,8 @@ struct btrfs_root { atomic_t log_writers; atomic_t log_commit[2]; atomic_t log_batch; - unsigned long log_transid; - unsigned long last_log_commit; + int log_transid; + int last_log_commit; pid_t log_start_pid; u64 objectid; diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c index c9f2479..c27e2c9 100644 --- a/fs/btrfs/tree-log.c +++ b/fs/btrfs/tree-log.c @@ -2362,7 +2362,7 @@ static int update_log_root(struct btrfs_trans_handle *trans, } static int wait_log_commit(struct btrfs_trans_handle *trans, - struct btrfs_root *root, unsigned long transid) + struct btrfs_root *root, int transid) { DEFINE_WAIT(wait); int index = transid % 2; @@ -2434,7 +2434,7 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans, int ret; struct btrfs_root *log = root->log_root; struct btrfs_root *log_root_tree = root->fs_info->log_root_tree; - unsigned long log_transid = 0; + int log_transid = 0; struct blk_plug plug; mutex_lock(&root->log_mutex); -- 1.8.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
