diff mbox series

writeback: avoid to move skipped wb in offline_cgwbs list

Message ID 20240118203119.764016-1-shikemeng@huaweicloud.com (mailing list archive)
State New
Headers show
Series writeback: avoid to move skipped wb in offline_cgwbs list | expand

Commit Message

Kemeng Shi Jan. 18, 2024, 8:31 p.m. UTC 
There is no need to move skipped wb to local list. Only move wb which is
going to be cleanup to avoid unnecessary work.

Signed-off-by: Kemeng Shi <shikemeng@huaweicloud.com>
---
 mm/backing-dev.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index 039dc74b505a..681548f848c5 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -773,8 +773,6 @@  static void cleanup_offline_cgwbs_workfn(struct work_struct *work)
 	while (!list_empty(&offline_cgwbs)) {
 		wb = list_first_entry(&offline_cgwbs, struct bdi_writeback,
 				      offline_node);
-		list_move(&wb->offline_node, &processed);
-
 		/*
 		 * If wb is dirty, cleaning up the writeback by switching
 		 * attached inodes will result in an effective removal of any
@@ -790,6 +788,8 @@  static void cleanup_offline_cgwbs_workfn(struct work_struct *work)
 		if (!wb_tryget(wb))
 			continue;
 
+		list_move(&wb->offline_node, &processed);
+
 		spin_unlock_irq(&cgwb_lock);
 		while (cleanup_offline_cgwb(wb))
 			cond_resched();