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Diffstat (limited to 'fs/xfs/xfs_trans_ail.c')
-rw-r--r--fs/xfs/xfs_trans_ail.c34
1 files changed, 19 insertions, 15 deletions
diff --git a/fs/xfs/xfs_trans_ail.c b/fs/xfs/xfs_trans_ail.c
index 2ffc570..e799824 100644
--- a/fs/xfs/xfs_trans_ail.c
+++ b/fs/xfs/xfs_trans_ail.c
@@ -237,14 +237,15 @@ out:
}
/*
- * Function that does the work of pushing on the AIL
+ * xfsaild_push does the work of pushing on the AIL. Returning a timeout of
+ * zero indicates that the caller should sleep until woken.
*/
long
xfsaild_push(
struct xfs_ail *ailp,
xfs_lsn_t *last_lsn)
{
- long tout = 1000; /* milliseconds */
+ long tout = 0;
xfs_lsn_t last_pushed_lsn = *last_lsn;
xfs_lsn_t target = ailp->xa_target;
xfs_lsn_t lsn;
@@ -252,6 +253,7 @@ xfsaild_push(
int flush_log, count, stuck;
xfs_mount_t *mp = ailp->xa_mount;
struct xfs_ail_cursor *cur = &ailp->xa_cursors;
+ int push_xfsbufd = 0;
spin_lock(&ailp->xa_lock);
xfs_trans_ail_cursor_init(ailp, cur);
@@ -262,7 +264,7 @@ xfsaild_push(
*/
xfs_trans_ail_cursor_done(ailp, cur);
spin_unlock(&ailp->xa_lock);
- last_pushed_lsn = 0;
+ *last_lsn = 0;
return tout;
}
@@ -279,7 +281,6 @@ xfsaild_push(
* prevents use from spinning when we can't do anything or there is
* lots of contention on the AIL lists.
*/
- tout = 10;
lsn = lip->li_lsn;
flush_log = stuck = count = 0;
while ((XFS_LSN_CMP(lip->li_lsn, target) < 0)) {
@@ -308,6 +309,7 @@ xfsaild_push(
XFS_STATS_INC(xs_push_ail_pushbuf);
IOP_PUSHBUF(lip);
last_pushed_lsn = lsn;
+ push_xfsbufd = 1;
break;
case XFS_ITEM_PINNED:
@@ -322,12 +324,6 @@ xfsaild_push(
stuck++;
break;
- case XFS_ITEM_FLUSHING:
- XFS_STATS_INC(xs_push_ail_flushing);
- last_pushed_lsn = lsn;
- stuck++;
- break;
-
default:
ASSERT(0);
break;
@@ -371,19 +367,24 @@ xfsaild_push(
* move forward in the AIL.
*/
XFS_STATS_INC(xs_push_ail_flush);
- xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE);
+ xfs_log_force(mp, 0);
+ }
+
+ if (push_xfsbufd) {
+ /* we've got delayed write buffers to flush */
+ wake_up_process(mp->m_ddev_targp->bt_task);
}
if (!count) {
/* We're past our target or empty, so idle */
- tout = 1000;
+ last_pushed_lsn = 0;
} else if (XFS_LSN_CMP(lsn, target) >= 0) {
/*
* We reached the target so wait a bit longer for I/O to
* complete and remove pushed items from the AIL before we
* start the next scan from the start of the AIL.
*/
- tout += 20;
+ tout = 50;
last_pushed_lsn = 0;
} else if ((stuck * 100) / count > 90) {
/*
@@ -395,11 +396,14 @@ xfsaild_push(
* Backoff a bit more to allow some I/O to complete before
* continuing from where we were.
*/
- tout += 10;
+ tout = 20;
+ } else {
+ /* more to do, but wait a short while before continuing */
+ tout = 10;
}
*last_lsn = last_pushed_lsn;
return tout;
-} /* xfsaild_push */
+}
/*
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