From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Hellwig Subject: Re: [Qemu-devel] [PATCH 0/4] megaraid_sas HBA emulation Date: Wed, 28 Oct 2009 09:40:22 +0100 Message-ID: <20091028084022.GB17601@lst.de> References: <4AE71116.6080809@suse.de> <4AE72419.60608@redhat.com> <20091028091129.n46xqd1lww8oosc8@imap.suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Gerd Hoffmann , qemu-devel@nongnu.org, kvm@vger.kernel.org, virtualization@lists.linux-foundation.org To: Hannes Reinecke Return-path: Received: from verein.lst.de ([213.95.11.210]:40036 "EHLO verein.lst.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932682AbZJ1Ikj (ORCPT ); Wed, 28 Oct 2009 04:40:39 -0400 Content-Disposition: inline In-Reply-To: <20091028091129.n46xqd1lww8oosc8@imap.suse.de> Sender: kvm-owner@vger.kernel.org List-ID: On Wed, Oct 28, 2009 at 09:11:29AM +0100, Hannes Reinecke wrote: > The problem is I don't have any documentation for the LSI parallel > SCSI controller. So I don't know if and in what shape I/O is passed > down, nor anything else. And as the SCSI disk emulation is really > tied into the LSI parallel SCSI controller, any change in the former > is likely to break the latter. scsi-disk is not tied into the lsi/symbios driver. It's also used by the esp driver and usb-mcd. But it's a complete mess, and all my attempts to untangle it have so far failed with my brain hurting for a long time after. From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1N3456-0002PU-Eq for qemu-devel@nongnu.org; Wed, 28 Oct 2009 04:40:36 -0400 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1N3451-0002Nc-TA for qemu-devel@nongnu.org; Wed, 28 Oct 2009 04:40:35 -0400 Received: from [199.232.76.173] (port=43862 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1N3451-0002NW-HR for qemu-devel@nongnu.org; Wed, 28 Oct 2009 04:40:31 -0400 Received: from verein.lst.de ([213.95.11.210]:36476) by monty-python.gnu.org with esmtps (TLS-1.0:DHE_RSA_3DES_EDE_CBC_SHA1:24) (Exim 4.60) (envelope-from ) id 1N3451-0001YY-0B for qemu-devel@nongnu.org; Wed, 28 Oct 2009 04:40:31 -0400 Date: Wed, 28 Oct 2009 09:40:22 +0100 From: Christoph Hellwig Subject: Re: [Qemu-devel] [PATCH 0/4] megaraid_sas HBA emulation Message-ID: <20091028084022.GB17601@lst.de> References: <4AE71116.6080809@suse.de> <4AE72419.60608@redhat.com> <20091028091129.n46xqd1lww8oosc8@imap.suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20091028091129.n46xqd1lww8oosc8@imap.suse.de> List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Hannes Reinecke Cc: virtualization@lists.linux-foundation.org, Gerd Hoffmann , kvm@vger.kernel.org, qemu-devel@nongnu.org On Wed, Oct 28, 2009 at 09:11:29AM +0100, Hannes Reinecke wrote: > The problem is I don't have any documentation for the LSI parallel > SCSI controller. So I don't know if and in what shape I/O is passed > down, nor anything else. And as the SCSI disk emulation is really > tied into the LSI parallel SCSI controller, any change in the former > is likely to break the latter. scsi-disk is not tied into the lsi/symbios driver. It's also used by the esp driver and usb-mcd. But it's a complete mess, and all my attempts to untangle it have so far failed with my brain hurting for a long time after.