From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mike Christie Subject: Re: [RFC] SCSI target for IBM Power5 LPAR Date: Wed, 07 Sep 2005 12:17:30 -0500 Message-ID: <431F20AA.1090101@cs.wisc.edu> References: <20050906212801.GB14057@cs.umn.edu> <20050907104932.GA14200@lst.de> <20050907124504.GA13614@cs.umn.edu> <20050907215816C.fujita.tomonori@lab.ntt.co.jp> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20050907215816C.fujita.tomonori@lab.ntt.co.jp> Sender: linux-kernel-owner@vger.kernel.org To: FUJITA Tomonori Cc: boutcher@cs.umn.edu, hch@lst.de, vst@vlnb.net, linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org, linuxppc64-dev@ozlabs.org, santil@us.ibm.com, lxiep@us.ibm.com List-Id: linux-scsi@vger.kernel.org FUJITA Tomonori wrote: > month. We discussed it with Christoph and decided that it would be > better to start from scratch because of the design differences. Some of the things we are trying to improve upon are things that are better supported in 2.6. Some differences: - We will support controller hotplug. - We allow any type of device (dm, scsi, ide, LVM@ etc) as storage. And we do not want hook into SCSI-ml's upper layer drivers and deal with that refcounting if we can help it so we push a lot of code to userspace and only do reads and writes in the kernel. - We also hope to support any block layer target. - As mentioned before, scatterlists by using the block layer's support. There may be more that I am forgetting, but originally we started out by trying to clean up the SCST code for 2.6 and make it resemble SCSI-ml's hotplug model. As we did this it looked like some code could live in userspace and it would end up being a rewrite becuase there was so much to do so we started a new project. We hope to work with Vlad and the SCST developers.