The free space tree bitmap slab cache is created with SLAB_RED_ZONE but
that's a debugging flag and not always enabled. Also the other slabs are
created with at least SLAB_MEM_SPREAD that we want as well to average
the memory placement cost.

Reported-by: Vlastimil Babka <>
Fixes: 3acd48507dc4 ("btrfs: fix allocation of free space cache v1 bitmap 
CC: # 5.4+
Signed-off-by: David Sterba <>
 fs/btrfs/inode.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 35bfa0533f23..17ec5c4ae18c 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -9008,7 +9008,7 @@ int __init btrfs_init_cachep(void)
        btrfs_free_space_bitmap_cachep = 
                                                        PAGE_SIZE, PAGE_SIZE,
-                                                       SLAB_RED_ZONE, NULL);
+                                                       SLAB_MEM_SPREAD, NULL);
        if (!btrfs_free_space_bitmap_cachep)
                goto fail;

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