From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mike Christie Subject: Re: Ang: Re: [Stgt-devel] Re: [Iscsitarget-devel] stgt a new version of iscsi target? Date: Thu, 08 Dec 2005 14:09:32 -0600 Message-ID: <439892FC.8040900@cs.wisc.edu> References: <43972C2D.9060500@cs.wisc.edu> <43987F75.2000301@vlnb.net> <4398850D.8070102@cs.wisc.edu> <1134071290.3259.31.camel@mulgrave> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from sabe.cs.wisc.edu ([128.105.6.20]:4326 "EHLO sabe.cs.wisc.edu") by vger.kernel.org with ESMTP id S932301AbVLHUJ7 (ORCPT ); Thu, 8 Dec 2005 15:09:59 -0500 In-Reply-To: <1134071290.3259.31.camel@mulgrave> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: James Bottomley Cc: Vladislav Bolkhovitin , johan@capvert.se, iscsitarget-devel@lists.sourceforge.net, mingz@ele.uri.edu, stgt , Robert Whitehead , scst-devel@lists.sourceforge.net, linux-scsi@vger.kernel.org, Christoph Hellwig James Bottomley wrote: > On Thu, 2005-12-08 at 13:10 -0600, Mike Christie wrote: > >>cleanup. In the end some of the scsi people liked the idea of throwing >>the non-read/write command to userspace and to do this we just decided >>to start over but I have been cutting and pasting your code and cleaning >>it up as I add more stuff. > > > To be honest, I'd like to see all command processing at user level > (including read/write ... for block devices, it shouldn't be that > inefficient, since you're merely going to say remap an area from one > device to another; as long as no data transformation ever occurs, the > user never touches the data and it all remains in the kernel page > cache). Ok, Tomo and I briefly talked about this when we saw Jeff's post about doing block layer drivers in userspace on lkml. I think we were somewhat prepared for this given some of your other replies. So Vlad and other target guys what do you think? Vlad are you going to continue to maintain scst as kernel only, or is there some place we can work together on this on - if your feelings are not hurt too much that is :) ?