From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tejun Heo Subject: Re: [PATCH #upstream-fixes] sata_mv: don't issue two DMA commands concurrently Date: Wed, 13 Aug 2008 21:21:44 +0900 Message-ID: <48A2D1D8.4040405@gmail.com> References: <489C19CE.6030708@ngs.ru> <489C4B6E.9070306@rtr.ca> <489C4F29.6020007@rtr.ca> <489C54D1.5080901@rtr.ca> <48A29E14.3090908@gmail.com> <48A2BBDC.2090201@ngs.ru> <48A2BC5D.5060801@gmail.com> <48A2C35C.7020400@ngs.ru> <48A2C460.6040504@gmail.com> <48A2C770.2040200@ngs.ru> <48A2CB1B.4000200@gmail.com> <48A2CE09.9090806@ngs.ru> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Return-path: Received: from ti-out-0910.google.com ([209.85.142.191]:40189 "EHLO ti-out-0910.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751040AbYHMMWm (ORCPT ); Wed, 13 Aug 2008 08:22:42 -0400 Received: by ti-out-0910.google.com with SMTP id b6so1529404tic.23 for ; Wed, 13 Aug 2008 05:22:40 -0700 (PDT) In-Reply-To: <48A2CE09.9090806@ngs.ru> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Artem Bokhan Cc: linux-ide@vger.kernel.org Artem Bokhan wrote: > When I run 'dd if=/dev/sda of=/dev/null skip=9700 bs=1M' and it meets > bad block, it takes about > '/sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0/0000:02:02.0/host4/target4:0:0/4:0:0:0/timeout > + about 10 seconds' to determine I/O error. Until that IO to device is > locked, as I understand. I want to reduce the time of lock as much as > possible. > > dd: reading `/dev/sda': Input/output error > 240+1 records in > 240+1 records out > 252575744 bytes (253 MB) copied, 13.7833 s, 18.3 MB/s Can you post timestamped dmesg? -- tejun