From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jens Axboe Subject: Re: [DO NOT APPLY] sd take advantage of rotation speed Date: Wed, 25 Jun 2008 20:01:50 +0200 Message-ID: <20080625180149.GG20851@kernel.dk> 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> <20080625173444.GS4392@parisc-linux.org> <1214415830.5674.30.camel@localhost.localdomain> <20080625175303.GT4392@parisc-linux.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from brick.kernel.dk ([87.55.233.238]:16358 "EHLO kernel.dk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751401AbYFYSBw (ORCPT ); Wed, 25 Jun 2008 14:01:52 -0400 Content-Disposition: inline In-Reply-To: <20080625175303.GT4392@parisc-linux.org> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Matthew Wilcox Cc: James Bottomley , Boaz Harrosh , Ric Wheeler , linux-scsi@vger.kernel.org On Wed, Jun 25 2008, Matthew Wilcox wrote: > On Wed, Jun 25, 2008 at 12:43:50PM -0500, James Bottomley wrote: > > On Wed, 2008-06-25 at 11:34 -0600, Matthew Wilcox wrote: > > > On Wed, Jun 25, 2008 at 07:26:39PM +0200, Jens Axboe wrote: > > > > Uhm, but it IS "a blatant layering violation", it's doing things from > > > > the wrong side up :-) > > > > > > That's just "doing things from a spot Jens doesn't approve of". A > > > layering violation would be SCSI knowing how elevators work. > > > > When it was setting particular elevators, it was a layering violation > > (as I said at the time). If it's just setting a seek cost hint, that's > > acceptable. > > You're both being silly. Interacting with a subsystem via its exposed > interfaces is not a layering violation. Dude, get a grip, your line is reasoning is getting silly. By that logic, as long as something is exported you can use it from wherever you want? Uhm right. -- Jens Axboe