From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hannes Reinecke Subject: Re: [LSF/MM TOPIC] [ATTEND] SR-IOV Management Date: Wed, 01 Feb 2012 10:27:39 +0100 Message-ID: <4F29058B.6020904@suse.de> References: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from cantor2.suse.de ([195.135.220.15]:50508 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753519Ab2BAJ1l (ORCPT ); Wed, 1 Feb 2012 04:27:41 -0500 In-Reply-To: Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Chad Dupuis Cc: lsf-pc@lists.linux-foundation.org, linux-scsi@vger.kernel.org On 01/31/2012 08:02 PM, Chad Dupuis wrote: > With more and more storage controller hardware supporting SR-IOV in > next > couple of years it seems to make sense at this point to discuss, from= a > storage stack perspective, managing how we instantiate and manage > SR-IOV > virtual functions (VFs). Currently for hardware that does support > SR-IOV, > the management of that functionality is managed entirely by the > hardware > device driver. However, a more dynamic management to how VFs are > created > and destroyed (assuming the hardware supports it) may be more desirab= le > since the most common use case, assigning VFs to virtual guests, also > tends to be very dynamic and fluid. We also need to consider how VFs > interact with complimentary technology such as NPIV in Fibre Channel. >=20 > I'd like to propose that we discuss the following issues to see if a > consensus can be reached about how to deal with them: >=20 > * VF instantiation > * VF/NPIV port pairing > * Namespace management > * LUN presentation >=20 Actually, SR-IOV on FC should be easy to handle; it maps quite easily on NPIV (which probably was the intention :-). However, for SAS things get really tricky, as we don't have virtual SAS IDs. Some vendor was actually planning on doing ACLs in firmware (shudder). And then there is the pci-stub mess. So yes, definitely something to discuss here. Cheers, Hannes --=20 Dr. Hannes Reinecke zSeries & Storage hare@suse.de +49 911 74053 688 SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 N=FCrnberg GF: J. Hawn, J. Guild, F. Imend=F6rffer, HRB 16746 (AG N=FCrnberg) -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html