Only read the LSN we need to push to with the ilock held, and then release
it before we do the log force to improve concurrency.
This also removes the only direct caller of _xfs_trans_commit, thus
allowing it to be merged into the plain xfs_trans_commit again.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Index: xfs/fs/xfs/xfs_file.c
===================================================================
--- xfs.orig/fs/xfs/xfs_file.c 2011-09-18 16:34:03.995780628 -0400
+++ xfs/fs/xfs/xfs_file.c 2011-09-19 10:47:07.679732387 -0400
@@ -137,6 +137,7 @@ xfs_file_fsync(
struct xfs_trans *tp;
int error = 0;
int log_flushed = 0;
+ xfs_lsn_t lsn = 0;
trace_xfs_file_fsync(ip);
@@ -214,9 +215,9 @@ xfs_file_fsync(
*/
xfs_trans_ijoin(tp, ip);
xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
- xfs_trans_set_sync(tp);
- error = _xfs_trans_commit(tp, 0, &log_flushed);
+ error = xfs_trans_commit(tp, 0);
+ lsn = ip->i_itemp->ili_last_lsn;
xfs_iunlock(ip, XFS_ILOCK_EXCL);
} else {
/*
@@ -227,14 +228,14 @@ xfs_file_fsync(
* disk yet, the inode will be still be pinned. If it is,
* force the log.
*/
- if (xfs_ipincount(ip)) {
- error = _xfs_log_force_lsn(mp,
- ip->i_itemp->ili_last_lsn,
- XFS_LOG_SYNC, &log_flushed);
- }
+ if (xfs_ipincount(ip))
+ lsn = ip->i_itemp->ili_last_lsn;
xfs_iunlock(ip, XFS_ILOCK_SHARED);
}
+ if (!error && lsn)
+ error = _xfs_log_force_lsn(mp, lsn, XFS_LOG_SYNC, &log_flushed);
+
/*
* If we only have a single device, and the log force about was
* a no-op we might have to flush the data device cache here.
Index: xfs/fs/xfs/xfs_trans.c
===================================================================
--- xfs.orig/fs/xfs/xfs_trans.c 2011-09-18 16:31:44.255777336 -0400
+++ xfs/fs/xfs/xfs_trans.c 2011-09-19 10:46:47.181231805 -0400
@@ -1790,9 +1790,7 @@ xfs_trans_commit_cil(
}
/*
- * xfs_trans_commit
- *
- * Commit the given transaction to the log a/synchronously.
+ * Commit the given transaction to the log.
*
* XFS disk error handling mechanism is not based on a typical
* transaction abort mechanism. Logically after the filesystem
@@ -1804,10 +1802,9 @@ xfs_trans_commit_cil(
* Do not reference the transaction structure after this call.
*/
int
-_xfs_trans_commit(
+xfs_trans_commit(
struct xfs_trans *tp,
- uint flags,
- int *log_flushed)
+ uint flags)
{
struct xfs_mount *mp = tp->t_mountp;
xfs_lsn_t commit_lsn = -1;
@@ -1866,7 +1863,7 @@ _xfs_trans_commit(
if (sync) {
if (!error) {
error = _xfs_log_force_lsn(mp, commit_lsn,
- XFS_LOG_SYNC, log_flushed);
+ XFS_LOG_SYNC, NULL);
}
XFS_STATS_INC(xs_trans_sync);
} else {
Index: xfs/fs/xfs/xfs_trans.h
===================================================================
--- xfs.orig/fs/xfs/xfs_trans.h 2011-09-18 16:31:44.271777154 -0400
+++ xfs/fs/xfs/xfs_trans.h 2011-09-19 10:46:47.081232193 -0400
@@ -487,10 +487,7 @@ void xfs_trans_log_efd_extent(xfs_trans
struct xfs_efd_log_item *,
xfs_fsblock_t,
xfs_extlen_t);
-int _xfs_trans_commit(xfs_trans_t *,
- uint flags,
- int *);
-#define xfs_trans_commit(tp, flags) _xfs_trans_commit(tp, flags, NULL)
+int xfs_trans_commit(xfs_trans_t *, uint flags);
void xfs_trans_cancel(xfs_trans_t *, int);
int xfs_trans_ail_init(struct xfs_mount *);
void xfs_trans_ail_destroy(struct xfs_mount *);
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