Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753440AbZIAQMq (ORCPT ); Tue, 1 Sep 2009 12:12:46 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751733AbZIAQMp (ORCPT ); Tue, 1 Sep 2009 12:12:45 -0400 Received: from sj-iport-6.cisco.com ([171.71.176.117]:31313 "EHLO sj-iport-6.cisco.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751256AbZIAQMo (ORCPT ); Tue, 1 Sep 2009 12:12:44 -0400 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: ApoEAIfknEqrR7MV/2dsb2JhbADEaIhBAZAFBYQb X-IronPort-AV: E=Sophos;i="4.44,313,1249257600"; d="scan'208";a="379797447" From: Roland Dreier 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 Subject: Re: [PATCH] SCSI driver for VMware's virtual HBA. References: <1251415060.16297.58.camel@ank32.eng.vmware.com> <1251739735.16169.20.camel@ank32.eng.vmware.com> <1251741624.18828.83.camel@mulgrave.site> X-Message-Flag: Warning: May contain useful information Date: Tue, 01 Sep 2009 09:12:43 -0700 In-Reply-To: (Bart Van Assche's message of "Tue, 1 Sep 2009 13:12:24 +0200") Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.0.91 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-OriginalArrivalTime: 01 Sep 2009 16:12:44.0267 (UTC) FILETIME=[09D8E3B0:01CA2B1F] Authentication-Results: sj-dkim-1; header.From=rdreier@cisco.com; dkim=pass ( sig from cisco.com/sjdkim1004 verified; ); Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1296 Lines: 29 > - 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. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/