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From: Christian Borntraeger <borntraeger@de.ibm.com>
To: Hannes Reinecke <hare@suse.de>
Cc: kvm@vger.kernel.org, virtualization@lists.linux-foundation.org
Subject: Re: [RFC] [PATCH] SCSI passthrough for virtio-blk
Date: Fri, 29 Aug 2008 13:01:44 +0200	[thread overview]
Message-ID: <200808291301.44242.borntraeger@de.ibm.com> (raw)
In-Reply-To: <48B7C159.5010800@suse.de>

Am Freitag, 29. August 2008 schrieb Hannes Reinecke:
> So when using '-drive file=/dev/sgXX,if=virtio,format=host_device' you
> can happily call any sg_XX command on the resulting vdX device. Quite
> neat, methinks. And it's even backwards compatible, so each of these
> patches should work without the other one applied.

Does not work here. If the host does not support the pass-through, the device 
drivers waits for an response. I tried  sdparm /dev/vda with a patched kernel 
and an unpatched userspace.

I think you should use a feature bit to avoid problems.

Christian

  reply	other threads:[~2008-08-29 11:01 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-08-29  9:28 [RFC] [PATCH] SCSI passthrough for virtio-blk Hannes Reinecke
2008-08-29 11:01 ` Christian Borntraeger [this message]
2008-08-29 11:47   ` Hannes Reinecke
2008-08-29 12:00     ` Christian Borntraeger
2008-08-29 12:04       ` Hannes Reinecke
2008-08-29 12:48         ` Christian Borntraeger
2008-08-29 13:18         ` Christian Borntraeger

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