[16/58] libxfs: fix min freelist length calculation
diff mbox

Message ID 20151007045638.30457.6662.stgit@birch.djwong.org
State New
Headers show

Commit Message

Darrick J. Wong Oct. 7, 2015, 4:56 a.m. UTC
If rmapbt is disabled, it is incorrect to require 1 extra AGFL block
for the rmapbt (due to the + 1); the entire clause needs to be gated
on the feature flag.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
---
 fs/xfs/libxfs/xfs_alloc.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)



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Patch
diff mbox

diff --git a/fs/xfs/libxfs/xfs_alloc.c b/fs/xfs/libxfs/xfs_alloc.c
index 6fd9d3e..d7b9d43 100644
--- a/fs/xfs/libxfs/xfs_alloc.c
+++ b/fs/xfs/libxfs/xfs_alloc.c
@@ -1978,8 +1978,10 @@  xfs_alloc_min_freelist(
 	min_free += min_t(unsigned int, pag->pagf_levels[XFS_BTNUM_CNTi] + 1,
 				       mp->m_ag_maxlevels);
 	/* space needed reverse mapping used space btree */
-	min_free += min_t(unsigned int, pag->pagf_levels[XFS_BTNUM_RMAPi] + 1,
-				       mp->m_ag_maxlevels);
+	if (xfs_sb_version_hasrmapbt(&mp->m_sb))
+		min_free += min_t(unsigned int,
+				  pag->pagf_levels[XFS_BTNUM_RMAPi] + 1,
+				  mp->m_ag_maxlevels);
 
 	return min_free;
 }