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From: Christian Hoff <christian.hoff@de.ibm.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: BORNTRAE@linux.vnet.ibm.com,
	James Bottomley <JBottomley@parallels.com>,
	kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-scsi@vger.kernel.org, mst@redhat.com,
	rusty@rustcorp.com.au
Subject: Re: Pe: [PATCH v5 1/3] virtio-scsi: first version
Date: Thu, 9 Feb 2012 13:18:21 +0100	[thread overview]
Message-ID: <OFDF7B0B80.B44589BA-ONC125799F.00410C52-C125799F.00439AD0@de.ibm.com> (raw)
In-Reply-To: <4F3390FB.80107@redhat.com>

Paolo Bonzini wrote:
> James, will you include virtio-scsi in 3.4?

The key arguments from my side for inclusion of virtio-scsi are:
- Support for SCSI multipathing, which can optionally be done on the host 
operating system.
- We can now use other SCSI(non-block) devices and make them accessible to 
the guest. For example we were able to virtualize a SCSI FCP tape using 
virtio-scsi. One of the biggest constraints of virtio-block is that it is 
limited to block devices, while virtio-scsi presents you with a more 
generic solution.

So I consider virtio-scsi to be the cleaner approach to do virtualization 
of SCSI commands. This is supported by the fact that virtio-block has a 
maintenance problem and has to change its protocol from time to time to 
support new features introduced by a new version of the SCSI standard.

So please consider including virtio-scsi into the mainline kernel tree. 
This is good and conceptually clean code, and it has proven to work very 
well in our internal testing.

Mit freundlichen Grüßen / Kind regards

Christian Hoff

Student - Applied Computer Science


Phone:
49-16098976-950
 IBM Deutschland

E-Mail:
christian.hoff@de.ibm.com
 Am Fichtenberg 1


 71083 Herrenberg


 Germany


IBM Deutschland GmbH / Vorsitzender des Aufsichtsrats: Martin Jetter
Geschäftsführung: Martina Koederitz (Vorsitzende), Reinhard Reschke, 
Dieter Scholz, Gregor Pillen, Joachim Heel, Christian Noll
Sitz der Gesellschaft: Ehningen / Registergericht: Amtsgericht Stuttgart, 
HRB 14562 / WEEE-Reg.-Nr. DE 99369940 


  reply	other threads:[~2012-02-09 12:18 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-02-06  9:51 Pe: [PATCH v5 1/3] virtio-scsi: first version Christian Hoff
2012-02-07  9:54 ` Paolo Bonzini
2012-02-07 11:10   ` Michael S. Tsirkin
2012-02-07 11:26     ` Paolo Bonzini
2012-02-07 11:56   ` Christian Borntraeger
2012-02-07 12:31     ` Paolo Bonzini
2012-02-07 13:18       ` Christian Borntraeger
2012-02-07 13:59         ` Christian Hoff
2012-02-07 14:28           ` Paolo Bonzini
2012-02-08 13:37             ` Christian Hoff
2012-02-09  9:25               ` Paolo Bonzini
2012-02-09 12:18                 ` Christian Hoff [this message]
2012-02-12 20:16                 ` James Bottomley
2012-02-12 23:41                   ` Rusty Russell
2012-02-13  7:05                   ` Christian Borntraeger
2012-02-13  7:57                     ` Dor Laor
2012-02-13 12:40                       ` Nicholas A. Bellinger
2012-02-13 12:54                         ` Dor Laor
2012-02-13 13:00                           ` Michael S. Tsirkin
2012-02-13 13:13                             ` ronnie sahlberg
2012-02-13 13:17                               ` Paolo Bonzini
2012-02-13 13:18                               ` Michael S. Tsirkin
2012-02-13 15:12                                 ` Hannes Reinecke
2012-02-13 20:42                                   ` ronnie sahlberg
2012-02-13 20:53                                     ` ronnie sahlberg
2012-02-13 22:59                                       ` Michael S. Tsirkin
2012-02-13 23:30                                         ` ronnie sahlberg
2012-02-13 23:33                                           ` Michael S. Tsirkin
2012-02-14  0:49                                             ` ronnie sahlberg
2012-02-14  1:11                                               ` Michael S. Tsirkin
2012-02-14  9:57                                                 ` Paolo Bonzini
2012-02-13 11:08                     ` Bart Van Assche
2012-02-13  9:19                   ` Paolo Bonzini
2012-02-14  0:07                     ` Rusty Russell

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