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authorDave Chinner <dchinner@redhat.com>2020-03-26 04:18:21 +0300
committerDarrick J. Wong <darrick.wong@oracle.com>2020-03-27 18:32:53 +0300
commit9590e9c68449055c97e954118699bc9d470d7e30 (patch)
treefdc13e76a6eb3aa5b30aab0eb749a7514a57ee83 /fs/xfs
parent7ec949212dba350f1dbc339d2db844db68b39725 (diff)
downloadlinux-9590e9c68449055c97e954118699bc9d470d7e30.tar.xz
xfs: re-order initial space accounting checks in xlog_write
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@redhat.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Diffstat (limited to 'fs/xfs')
-rw-r--r--fs/xfs/xfs_log.c31
1 files changed, 10 insertions, 21 deletions
diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c
index 33f089aa2a25..3a4fe4e2e736 100644
--- a/fs/xfs/xfs_log.c
+++ b/fs/xfs/xfs_log.c
@@ -2356,10 +2356,10 @@ xlog_write(
bool need_start_rec)
{
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;
@@ -2367,24 +2367,16 @@ xlog_write(
int data_cnt = 0;
int error = 0;
- *start_lsn = 0;
-
-
/*
- * 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 and unmount records need to be accounted for.
- * These come in as separate writes so are easy to detect.
- */
- if (!need_start_rec)
- ticket->t_curr_res -= sizeof(struct xlog_op_header);
if (ticket->t_curr_res < 0) {
xfs_alert_tag(log->l_mp, XFS_PTAG_LOGRES,
"ctx ticket reservation ran out. Need to up reservation");
@@ -2393,10 +2385,7 @@ xlog_write(
}
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;