I've rebooted server and run backup to btrfs partition again. It seems that problem is gone, high sys load does not occur now. So it is some bug in btrfs... Before reboot server had 30 days uptime so its really not much. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
