window_free      2928 fs/btrfs/free-space-cache.c 	u64 window_free;
window_free      2949 fs/btrfs/free-space-cache.c 	window_free = entry->bytes;
window_free      2968 fs/btrfs/free-space-cache.c 		window_free += entry->bytes;
window_free      2973 fs/btrfs/free-space-cache.c 	if (window_free < bytes || max_extent < cont1_bytes)