From: Christian Borntraeger <borntraeger@de.ibm.com>
To: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>,
Rusty Russell <rusty@rustcorp.com.au>,
qemu-devel@nongnu.org, kvm@vger.kernel.org
Subject: Re: [Qemu-devel] Re: [PATCH] virtio-blk: add SGI_IO passthru support
Date: Tue, 28 Apr 2009 21:09:52 +0200 [thread overview]
Message-ID: <200904282109.52905.borntraeger@de.ibm.com> (raw)
In-Reply-To: <20090428095154.GB4137@lst.de>
Am Tuesday 28 April 2009 11:51:54 schrieb Christoph Hellwig:
> Not quite yet. Eventually I want to support a virtio-scsi kind of
> transport which would use the same virtio-blk protocol but only send
> scsi commands. We'd need a different driver on the Linux side for
> it that registers to the scsi layer. On the QEMU side it could either
> do pass-through to a real scsi device using SG_IO or use the existing
Yes, virtio-scsi is also something we were thinking of. The last time we discussed this idea of SCSI passthrough internally, we stumbled over error recovery. Who is responsible for the error recovery? The host, the guest, or both? Are there problems, which will trigger error recovery in the guest and host midlayer at the same time? To be honest, my scsi knowledge is very limited, so I dont know if that is a real problem.
Christian
next prev parent reply other threads:[~2009-04-28 19:10 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20090427082606.GA32604@lst.de>
2009-04-27 8:29 ` [Qemu-devel] [PATCH] virtio-blk: add SGI_IO passthru support Christoph Hellwig
2009-04-27 9:15 ` Avi Kivity
2009-04-28 9:47 ` Christoph Hellwig
2009-04-27 14:36 ` [Qemu-devel] " Anthony Liguori
2009-04-28 9:51 ` Christoph Hellwig
2009-04-28 16:37 ` Anthony Liguori
2009-04-28 16:52 ` Christian Borntraeger
2009-04-29 10:48 ` Christoph Hellwig
2009-04-29 11:11 ` Paul Brook
2009-04-29 11:19 ` Christian Borntraeger
2009-04-29 11:29 ` Paul Brook
2009-04-29 11:21 ` Christoph Hellwig
2009-04-29 11:37 ` Paul Brook
2009-04-30 20:13 ` Christoph Hellwig
2009-04-30 20:55 ` Nicholas A. Bellinger
2009-04-30 21:49 ` Paul Brook
2009-04-30 21:56 ` Javier Guerra
2009-05-01 7:24 ` Christoph Hellwig
2009-05-01 11:08 ` Jamie Lokier
2009-05-01 14:28 ` Christoph Hellwig
2009-05-05 5:21 ` Rusty Russell
2009-04-28 19:09 ` Christian Borntraeger [this message]
2009-04-29 10:50 ` Christoph Hellwig
2009-04-29 11:07 ` Christian Borntraeger
2009-04-28 9:57 ` [Qemu-devel] [PATCH 2/2] virtio-blk: add SG_IO " Christoph Hellwig
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