From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?GB2312?B?0Lu42Q==?= Subject: ordered I/O with multipath Date: Wed, 8 Apr 2009 12:59:49 +0800 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit To: linux-fsdevel@vger.kernel.org Return-path: Received: from wf-out-1314.google.com ([209.85.200.171]:52718 "EHLO wf-out-1314.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752568AbZDHE7u (ORCPT ); Wed, 8 Apr 2009 00:59:50 -0400 Received: by wf-out-1314.google.com with SMTP id 29so3132609wff.4 for ; Tue, 07 Apr 2009 21:59:49 -0700 (PDT) Sender: linux-fsdevel-owner@vger.kernel.org List-ID: Hi, Some journal filesystem use barrier i/o to ensure the order of the committing data. But if the filesystem is on the top of volume manager which support the raid and multipath. The barrier i/o might not be handled correctly. How does journal filesystem deal with this? -- Xie Gang