Adding upstream version 6.9.9.upstream/6.9.9

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 11 insertions, 2 deletions

diff --git a/fs/btrfs/block-group.c b/fs/btrfs/block-group.c
index 1a66be33bb..60066822b5 100644
--- a/fs/btrfs/block-group.c
+++ b/fs/btrfs/block-group.c
@@ -1924,8 +1924,17 @@ void btrfs_reclaim_bgs_work(struct work_struct *work)
 next:
 		if (ret) {
 			/* Refcount held by the reclaim_bgs list after splice. */
-			btrfs_get_block_group(bg);
-			list_add_tail(&bg->bg_list, &retry_list);
+			spin_lock(&fs_info->unused_bgs_lock);
+			/*
+			 * This block group might be added to the unused list
+			 * during the above process. Move it back to the
+			 * reclaim list otherwise.
+			 */
+			if (list_empty(&bg->bg_list)) {
+				btrfs_get_block_group(bg);
+				list_add_tail(&bg->bg_list, &retry_list);
+			}
+			spin_unlock(&fs_info->unused_bgs_lock);
 		}
 		btrfs_put_block_group(bg);