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-rw-r--r--fs/xfs/libxfs/xfs_alloc.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/fs/xfs/libxfs/xfs_alloc.c b/fs/xfs/libxfs/xfs_alloc.c
index bc3367b8b7bb..857a53e58b94 100644
--- a/fs/xfs/libxfs/xfs_alloc.c
+++ b/fs/xfs/libxfs/xfs_alloc.c
@@ -2042,6 +2042,7 @@ xfs_alloc_space_available(
xfs_extlen_t alloc_len, longest;
xfs_extlen_t reservation; /* blocks that are still reserved */
int available;
+ xfs_extlen_t agflcount;
if (flags & XFS_ALLOC_FLAG_FREEING)
return true;
@@ -2054,8 +2055,13 @@ xfs_alloc_space_available(
if (longest < alloc_len)
return false;
- /* do we have enough free space remaining for the allocation? */
- available = (int)(pag->pagf_freeblks + pag->pagf_flcount -
+ /*
+ * Do we have enough free space remaining for the allocation? Don't
+ * account extra agfl blocks because we are about to defer free them,
+ * making them unavailable until the current transaction commits.
+ */
+ agflcount = min_t(xfs_extlen_t, pag->pagf_flcount, min_free);
+ available = (int)(pag->pagf_freeblks + agflcount -
reservation - min_free - args->minleft);
if (available < (int)max(args->total, alloc_len))
return false;