From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hannes Reinecke Subject: [LSF/VM TOPIC] Handling of invalid requests in virtual HBAs Date: Thu, 01 Apr 2010 10:15:46 +0200 Message-ID: <4BB45632.5020700@suse.de> 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]:60174 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753979Ab0DAIPs (ORCPT ); Thu, 1 Apr 2010 04:15:48 -0400 Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: lsf10-pc@lists.linuxfoundation.org Cc: SCSI Mailing List Hi all, [Topic] Handling of invalid requests in virtual HBAs [Abstract] This discussion will focus on the problem of correct request handling w= ith virtual HBAs. =46or KVM I have implemented a 'megasas' HBA emulation which serves as = a backend for the megaraid_sas linux driver. It is now possible to connect several disks from different (physical) H= BAs to that HBA emulation, each having different logical capabilities wrt transfers= ize, sgl size, sgl length etc. The goal of this discussion is how to determine the 'best' capability s= etting for the virtual HBA and how to handle hotplug scenarios, where a disk might be = plugged in which has incompatible settings from the one the virtual HBA is using c= urrently. 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: Markus Rex, 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