From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefan Priebe Subject: Testing sequential cutoff Date: Thu, 11 Sep 2014 06:44:51 +0200 Message-ID: <541128C3.5000702@profihost.ag> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail-ph.de-nserver.de ([85.158.179.214]:39998 "EHLO mail-ph.de-nserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751652AbaIKEoz (ORCPT ); Thu, 11 Sep 2014 00:44:55 -0400 Sender: linux-bcache-owner@vger.kernel.org List-Id: linux-bcache@vger.kernel.org To: "linux-bcache@vger.kernel.org" Hi, what is the correct way of testing sequential cutoff? I've: - writeback mode - sequential_cutoff to 1M I'm doning: dd if=/dev/zero of=/dev/bcache0 oflag=direct bs=16M count=200 After that dirty value is at 2.3G and bypassed is 29M. I tested this with 3.17-rc4 and 3.10 kernel same results. What's wrong here? Thanks! Greets, Stefan