From mboxrd@z Thu Jan 1 00:00:00 1970 From: Roland Dreier Subject: Re: [PATCH] SCSI driver for VMware's virtual HBA. Date: Tue, 01 Sep 2009 09:12:43 -0700 Message-ID: References: <1251415060.16297.58.camel@ank32.eng.vmware.com> <1251739735.16169.20.camel@ank32.eng.vmware.com> <1251741624.18828.83.camel@mulgrave.site> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: In-Reply-To: (Bart Van Assche's message of "Tue, 1 Sep 2009 13:12:24 +0200") Sender: linux-kernel-owner@vger.kernel.org To: Bart Van Assche Cc: James Bottomley , akataria@vmware.com, Robert Love , Randy Dunlap , Mike Christie , linux-scsi@vger.kernel.org, LKML , Andrew Morton , Dmitry Torokhov , Rolf Eike Beer , Maxime Austruy List-Id: linux-scsi@vger.kernel.org > - Reuse the existing SRP initiator (ib_srp). Currently there are two > SRP initiators present in the Linux kernel -- one that uses the RDMA > verbs API (ib_srp) and one that only works with IBM's i/pSeries > hypervisor (ibmvscsi). This would be sane, although the difference in management APIs etc made this seem like quite a bit of work when I looked at it (hence the existence of both ibmvscsi and ib_srp). > - Reuse the ib_ipoib kernel module to provide an IP stack on top of > the new RDMA driver instead of having to maintain a separate network > driver for this hardware (ibmveth). I don't think this really makes sense, because IPoIB is not really handling ethernet (it is a different L2 ethernet encapsulation), and I think the commonality with ibmveth is going to be minimal. I'm not really sure we should be trying to force drivers to share just because they are paravirtualized -- if there is real commonality, then sure put it in common code, but different hypervisors are probably as different as different hardware. - R.