Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933903Ab0HFMEH (ORCPT ); Fri, 6 Aug 2010 08:04:07 -0400 Received: from bombadil.infradead.org ([18.85.46.34]:42057 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754479Ab0HFMED (ORCPT ); Fri, 6 Aug 2010 08:04:03 -0400 Date: Fri, 6 Aug 2010 08:03:58 -0400 From: Christoph Hellwig To: Christian Ehrhardt Cc: Josef Bacik , hch@infradead.org, Andrew Morton , "linux-kernel@vger.kernel.org" , linux-fsdevel@vger.kernel.org, linux-btrfs@vger.kernel.org Subject: Re: PATCH 3/6 - direct-io: do not merge logically non-contiguous requests Message-ID: <20100806120358.GA31601@infradead.org> References: <4C5BE8DB.5030503@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4C5BE8DB.5030503@linux.vnet.ibm.com> User-Agent: Mutt/1.5.20 (2009-08-17) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 409 Lines: 8 Something is deeply wrong here. Raw block device access has a 1:1 mapping between logical and physical block numbers. They really should never be non-contiguous. -- 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/