From: Pavel Begunkov <asml.silence@xxxxxxxxx>
[ Upstream commit 8fc058597a283e9a37720abb0e8d68e342b9387d ]
btrfs_discard_workfn() drops discard_ctl->lock just to take it again in
a moment in btrfs_discard_schedule_work(). Avoid that and also reuse
ktime.
Reviewed-by: Josef Bacik <josef@xxxxxxxxxxxxxx>
Signed-off-by: Pavel Begunkov <asml.silence@xxxxxxxxx>
Reviewed-by: David Sterba <dsterba@xxxxxxxx>
Signed-off-by: David Sterba <dsterba@xxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
fs/btrfs/discard.c | 43 +++++++++++++++++++++++--------------------
1 file changed, 23 insertions(+), 20 deletions(-)
diff --git a/fs/btrfs/discard.c b/fs/btrfs/discard.c
index d1a5380e8827d..9e1a06144e32d 100644
--- a/fs/btrfs/discard.c
+++ b/fs/btrfs/discard.c
@@ -328,28 +328,15 @@ void btrfs_discard_queue_work(struct btrfs_discard_ctl *discard_ctl,
btrfs_discard_schedule_work(discard_ctl, false);
}
-/**
- * btrfs_discard_schedule_work - responsible for scheduling the discard work
- * @discard_ctl: discard control
- * @override: override the current timer
- *
- * Discards are issued by a delayed workqueue item. @override is used to
- * update the current delay as the baseline delay interval is reevaluated on
- * transaction commit. This is also maxed with any other rate limit.
- */
-void btrfs_discard_schedule_work(struct btrfs_discard_ctl *discard_ctl,
- bool override)
+static void __btrfs_discard_schedule_work(struct btrfs_discard_ctl *discard_ctl,
+ u64 now, bool override)
{
struct btrfs_block_group *block_group;
- const u64 now = ktime_get_ns();
-
- spin_lock(&discard_ctl->lock);
if (!btrfs_run_discard_work(discard_ctl))
- goto out;
-
+ return;
if (!override && delayed_work_pending(&discard_ctl->work))
- goto out;
+ return;
block_group = find_next_block_group(discard_ctl, now);
if (block_group) {
@@ -382,7 +369,24 @@ void btrfs_discard_schedule_work(struct btrfs_discard_ctl *discard_ctl,
mod_delayed_work(discard_ctl->discard_workers,
&discard_ctl->work, delay);
}
-out:
+}
+
+/*
+ * btrfs_discard_schedule_work - responsible for scheduling the discard work
+ * @discard_ctl: discard control
+ * @override: override the current timer
+ *
+ * Discards are issued by a delayed workqueue item. @override is used to
+ * update the current delay as the baseline delay interval is reevaluated on
+ * transaction commit. This is also maxed with any other rate limit.
+ */
+void btrfs_discard_schedule_work(struct btrfs_discard_ctl *discard_ctl,
+ bool override)
+{
+ const u64 now = ktime_get_ns();
+
+ spin_lock(&discard_ctl->lock);
+ __btrfs_discard_schedule_work(discard_ctl, now, override);
spin_unlock(&discard_ctl->lock);
}
@@ -487,9 +491,8 @@ static void btrfs_discard_workfn(struct work_struct *work)
spin_lock(&discard_ctl->lock);
discard_ctl->block_group = NULL;
+ __btrfs_discard_schedule_work(discard_ctl, now, false);
spin_unlock(&discard_ctl->lock);
-
- btrfs_discard_schedule_work(discard_ctl, false);
}
/**
--
2.27.0
