diff mbox series

[12/13] btrfs: throttle truncate for delayed ref generation

Message ID 20200313212330.149024-13-josef@toxicpanda.com (mailing list archive)
State New, archived
Headers show
Series Throttle delayed refs based on time | expand

Commit Message

Josef Bacik March 13, 2020, 9:23 p.m. UTC 
Truncates can generate a lot of delayed refs, and if we're over our time
limit or we're already flushing we should just bail so the appropriate
action can be taken.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
---
 fs/btrfs/inode.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
diff mbox series

Patch

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index c9815ed03d21..c39794a95acb 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -4386,6 +4386,21 @@  int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
 			 * let the normal reservation dance happen higher up.
 			 */
 			if (should_throttle) {
+				struct btrfs_transaction *cur_trans =
+					trans->transaction;
+
+				/*
+				 * If we're over time, or we're flushing, go
+				 * ahead and break out so that we can let
+				 * everybody catch up.
+				 */
+				if (btrfs_should_throttle_delayed_refs(fs_info,
+					&cur_trans->delayed_refs, true) ||
+				    cur_trans->delayed_refs.flushing) {
+					ret = -EAGAIN;
+					break;
+				}
+
 				ret = btrfs_delayed_refs_rsv_refill(fs_info,
 							BTRFS_RESERVE_NO_FLUSH);
 				if (ret) {