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-rw-r--r--fs/xfs/libxfs/xfs_alloc.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/xfs/libxfs/xfs_alloc.c b/fs/xfs/libxfs/xfs_alloc.c
index be7e3fc..effb64c 100644
--- a/fs/xfs/libxfs/xfs_alloc.c
+++ b/fs/xfs/libxfs/xfs_alloc.c
@@ -128,6 +128,8 @@ xfs_alloc_ag_max_usable(
blocks++; /* finobt root block */
if (xfs_sb_version_hasrmapbt(&mp->m_sb))
blocks++; /* rmap root block */
+ if (xfs_sb_version_hasreflink(&mp->m_sb))
+ blocks++; /* refcount root block */
return mp->m_sb.sb_agblocks - blocks;
}