1 files changed, 12 insertions, 11 deletions

diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index b9557795eb74..de32f0fe47c8 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -1792,22 +1792,23 @@ xfs_inactive_ifree(
         int                     error;
 
         /*
-         * The ifree transaction might need to allocate blocks for record
-         * insertion to the finobt. We don't want to fail here at ENOSPC, so
-         * allow ifree to dip into the reserved block pool if necessary.
-         *
-         * Freeing large sets of inodes generally means freeing inode chunks,
-         * directory and file data blocks, so this should be relatively safe.
-         * Only under severe circumstances should it be possible to free enough
-         * inodes to exhaust the reserve block pool via finobt expansion while
-         * at the same time not creating free space in the filesystem.
+         * We try to use a per-AG reservation for any block needed by the finobt
+         * tree, but as the finobt feature predates the per-AG reservation
+         * support a degraded file system might not have enough space for the
+         * reservation at mount time.  In that case try to dip into the reserved
+         * pool and pray.
          *
          * Send a warning if the reservation does happen to fail, as the inode
          * now remains allocated and sits on the unlinked list until the fs is
          * repaired.
          */
-        error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ifree,
-                        XFS_IFREE_SPACE_RES(mp), 0, XFS_TRANS_RESERVE, &tp);
+        if (unlikely(mp->m_inotbt_nores)) {
+                error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ifree,
+                                XFS_IFREE_SPACE_RES(mp), 0, XFS_TRANS_RESERVE,
+                                &tp);
+        } else {
+                error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ifree, 0, 0, 0, &tp);
+        }
         if (error) {
                 if (error == -ENOSPC) {
                         xfs_warn_ratelimited(mp,