Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751064AbVIWFmu (ORCPT ); Fri, 23 Sep 2005 01:42:50 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751087AbVIWFmt (ORCPT ); Fri, 23 Sep 2005 01:42:49 -0400 Received: from mx1.cdacindia.com ([203.199.132.35]:60338 "HELO mailx.cdac.ernet.in") by vger.kernel.org with SMTP id S1751064AbVIWFmt (ORCPT ); Fri, 23 Sep 2005 01:42:49 -0400 Message-ID: <4333944D.2060503@cdac.in> Date: Fri, 23 Sep 2005 11:06:13 +0530 From: Karthik Sarangan User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.2) Gecko/20040805 Netscape/7.2 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Joel Becker CC: linux-kernel@vger.kernel.org Subject: Re: O_DIRECT for block device References: <4332697C.7070409@cdac.in> <20050922084036.GI27375@ca-server1.us.oracle.com> <43329590.3050006@cdac.in> <20050922152028.GJ27375@ca-server1.us.oracle.com> In-Reply-To: <20050922152028.GJ27375@ca-server1.us.oracle.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 650 Lines: 21 Joel Becker wrote: > On Thu, Sep 22, 2005 at 04:59:20PM +0530, Karthik Sarangan wrote: > >>I tried your tip and the read works beautifully but the write returns -1 >>and errno = EBADF! > > > Did you open with O_RDWR? > > Joel > Alright I didn't, though using O_DIRECT | O_RDWR the second time solved it :-) I finally got 69MBps read and 49 MBps writes on my SCSI disk. Thanks for helping me out. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/