From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Martin K. Petersen" Subject: Re: [DO NOT APPLY] sd take advantage of rotation speed Date: Wed, 25 Jun 2008 14:06:45 -0400 Message-ID: References: <20080619160342.GJ4392@parisc-linux.org> <20080625134705.GZ20851@kernel.dk> <4862552A.5010900@gmail.com> <48627184.9010609@panasas.com> <20080625165759.GC20851@kernel.dk> <20080625172015.GR4392@parisc-linux.org> <20080625172638.GE20851@kernel.dk> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from agminet01.oracle.com ([141.146.126.228]:33909 "EHLO agminet01.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752619AbYFYSHK (ORCPT ); Wed, 25 Jun 2008 14:07:10 -0400 In-Reply-To: <20080625172638.GE20851@kernel.dk> (Jens Axboe's message of "Wed\, 25 Jun 2008 19\:26\:39 +0200") Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Jens Axboe Cc: Matthew Wilcox , Boaz Harrosh , Ric Wheeler , linux-scsi@vger.kernel.org >>>>> "Jens" == Jens Axboe writes: Jens> Uhm, but it IS "a blatant layering violation", it's doing things Jens> from the wrong side up :-) I also disagree with mucking with the elevator directly in sd.c. The whole point of my I/O hints work is to expose the I/O topology in a generic fashion so that upper layers can take advantage of them. I'll post a new batch of those patches shortly... -- Martin K. Petersen Oracle Linux Engineering