4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Josef Bacik <jbacik@xxxxxx> commit 553cceb49681d60975d00892877d4c871bf220f9 upstream. We need to clear the max_extent_size when we clear bits from a bitmap since it could have been from the range that contains the max_extent_size. CC: stable@xxxxxxxxxxxxxxx # 4.4+ Reviewed-by: Liu Bo <bo.liu@xxxxxxxxxxxxxxxxx> Signed-off-by: Josef Bacik <jbacik@xxxxxx> Signed-off-by: David Sterba <dsterba@xxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- fs/btrfs/free-space-cache.c | 2 ++ 1 file changed, 2 insertions(+) --- a/fs/btrfs/free-space-cache.c +++ b/fs/btrfs/free-space-cache.c @@ -1693,6 +1693,8 @@ static inline void __bitmap_clear_bits(s bitmap_clear(info->bitmap, start, count); info->bytes -= bytes; + if (info->max_extent_size > ctl->unit) + info->max_extent_size = 0; } static void bitmap_clear_bits(struct btrfs_free_space_ctl *ctl,
