From: Dave Chinner <dchinner@xxxxxxxxxx>
Commit and unmount records records do not need start records to be
written, so rearrange the logic in xlog_write() to remove the need
to check for XLOG_TIC_INITED to determine if we should account for
the space used by a start record.
Signed-off-by: Dave Chinner <dchinner@xxxxxxxxxx>
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
fs/xfs/xfs_log.c | 38 ++++++++++++--------------------------
1 file changed, 12 insertions(+), 26 deletions(-)
diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c
index bf071552094a..116f59b16b04 100644
--- a/fs/xfs/xfs_log.c
+++ b/fs/xfs/xfs_log.c
@@ -2349,39 +2349,27 @@ xlog_write(
uint flags)
{
struct xlog_in_core *iclog = NULL;
- struct xfs_log_iovec *vecp;
- struct xfs_log_vec *lv;
+ struct xfs_log_vec *lv = log_vector;
+ struct xfs_log_iovec *vecp = lv->lv_iovecp;
+ int index = 0;
int len;
- int index;
int partial_copy = 0;
int partial_copy_len = 0;
int contwr = 0;
int record_cnt = 0;
int data_cnt = 0;
int error = 0;
- bool need_start_rec = true;
-
- *start_lsn = 0;
-
+ bool need_start_rec;
/*
- * Region headers and bytes are already accounted for.
- * We only need to take into account start records and
- * split regions in this function.
+ * If this is a commit or unmount transaction, we don't need a start
+ * record to be written. We do, however, have to account for the
+ * commit or unmount header that gets written. Hence we always have
+ * to account for an extra xlog_op_header here.
*/
- if (ticket->t_flags & XLOG_TIC_INITED) {
- ticket->t_curr_res -= sizeof(struct xlog_op_header);
+ ticket->t_curr_res -= sizeof(struct xlog_op_header);
+ if (ticket->t_flags & XLOG_TIC_INITED)
ticket->t_flags &= ~XLOG_TIC_INITED;
- }
-
- /*
- * Commit record headers need to be accounted for. These
- * come in as separate writes so are easy to detect.
- */
- if (flags & (XLOG_COMMIT_TRANS | XLOG_UNMOUNT_TRANS)) {
- ticket->t_curr_res -= sizeof(struct xlog_op_header);
- need_start_rec = false;
- }
if (ticket->t_curr_res < 0) {
xfs_alert_tag(log->l_mp, XFS_PTAG_LOGRES,
@@ -2390,11 +2378,9 @@ xlog_write(
xfs_force_shutdown(log->l_mp, SHUTDOWN_LOG_IO_ERROR);
}
+ need_start_rec = !(flags & (XLOG_COMMIT_TRANS | XLOG_UNMOUNT_TRANS));
len = xlog_write_calc_vec_length(ticket, log_vector, need_start_rec);
-
- index = 0;
- lv = log_vector;
- vecp = lv->lv_iovecp;
+ *start_lsn = 0;
while (lv && (!lv->lv_niovecs || index < lv->lv_niovecs)) {
void *ptr;
int log_offset;
--
2.25.1
