From: Christoph Hellwig <hch@lst.de>
To: Anthony Liguori <anthony@codemonkey.ws>
Cc: Christoph Hellwig <hch@lst.de>,
Christian Borntraeger <borntraeger@de.ibm.com>,
Rusty Russell <rusty@rustcorp.com.au>,
qemu-devel@nongnu.org, kvm@vger.kernel.org,
Hannes Reinecke <hare@suse.de>
Subject: Re: [Qemu-devel] Re: [PATCH] virtio-blk: add SGI_IO passthru support
Date: Wed, 29 Apr 2009 12:48:54 +0200 [thread overview]
Message-ID: <20090429104854.GA7846@lst.de> (raw)
In-Reply-To: <49F730AD.8090705@codemonkey.ws>
On Tue, Apr 28, 2009 at 11:37:01AM -0500, Anthony Liguori wrote:
> Ah, excellent. I think that's a great thing to do. So do you think
> virtio-scsi would deprecate virtio-blk?
I don't think so. If you have an image format or a non-scsi blockdevice
underneath virtio-block avoids the encoding into SCSI CDBs and back and
should be faster.
> I've gotten a number of requests for exposing stuff like VPD through
> virtio-blk. There's also a surprising amount of software out there that
> assumes /dev/sdX or /dev/hdX naming.
They should be fixed for a while, we have lots of non-scsi, non-ide
block devices.
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@lst.de>
To: Anthony Liguori <anthony@codemonkey.ws>
Cc: kvm@vger.kernel.org, Rusty Russell <rusty@rustcorp.com.au>,
qemu-devel@nongnu.org,
Christian Borntraeger <borntraeger@de.ibm.com>,
Hannes Reinecke <hare@suse.de>, Christoph Hellwig <hch@lst.de>
Subject: Re: [Qemu-devel] Re: [PATCH] virtio-blk: add SGI_IO passthru support
Date: Wed, 29 Apr 2009 12:48:54 +0200 [thread overview]
Message-ID: <20090429104854.GA7846@lst.de> (raw)
In-Reply-To: <49F730AD.8090705@codemonkey.ws>
On Tue, Apr 28, 2009 at 11:37:01AM -0500, Anthony Liguori wrote:
> Ah, excellent. I think that's a great thing to do. So do you think
> virtio-scsi would deprecate virtio-blk?
I don't think so. If you have an image format or a non-scsi blockdevice
underneath virtio-block avoids the encoding into SCSI CDBs and back and
should be faster.
> I've gotten a number of requests for exposing stuff like VPD through
> virtio-blk. There's also a surprising amount of software out there that
> assumes /dev/sdX or /dev/hdX naming.
They should be fixed for a while, we have lots of non-scsi, non-ide
block devices.
next prev parent reply other threads:[~2009-04-29 10:51 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-27 8:26 [PATCH] virtio-blk: add SGI_IO passthru support Christoph Hellwig
2009-04-27 8:29 ` Christoph Hellwig
2009-04-27 8:29 ` [Qemu-devel] " Christoph Hellwig
2009-04-27 9:15 ` Avi Kivity
2009-04-27 9:15 ` [Qemu-devel] " Avi Kivity
2009-04-28 9:47 ` Christoph Hellwig
2009-04-28 9:47 ` Christoph Hellwig
2009-04-27 14:36 ` Anthony Liguori
2009-04-27 14:36 ` [Qemu-devel] " Anthony Liguori
2009-04-28 9:51 ` Christoph Hellwig
2009-04-28 9:51 ` Christoph Hellwig
2009-04-28 16:37 ` Anthony Liguori
2009-04-28 16:52 ` Christian Borntraeger
2009-04-28 16:52 ` Christian Borntraeger
2009-04-29 10:48 ` Christoph Hellwig [this message]
2009-04-29 10:48 ` Christoph Hellwig
2009-04-29 11:11 ` Paul Brook
2009-04-29 11:11 ` Paul Brook
2009-04-29 11:19 ` Christian Borntraeger
2009-04-29 11:19 ` Christian Borntraeger
2009-04-29 11:29 ` Paul Brook
2009-04-29 11:29 ` Paul Brook
2009-04-29 11:21 ` Christoph Hellwig
2009-04-29 11:21 ` Christoph Hellwig
2009-04-29 11:37 ` Paul Brook
2009-04-29 11:37 ` Paul Brook
2009-04-30 20:13 ` Christoph Hellwig
2009-04-30 20:13 ` Christoph Hellwig
2009-04-30 20:55 ` Nicholas A. Bellinger
2009-04-30 20:55 ` Nicholas A. Bellinger
2009-04-30 21:49 ` Paul Brook
2009-04-30 21:49 ` Paul Brook
2009-04-30 21:56 ` Javier Guerra
2009-04-30 21:56 ` Javier Guerra
2009-05-01 7:24 ` Christoph Hellwig
2009-05-01 7:24 ` Christoph Hellwig
2009-05-01 11:08 ` Jamie Lokier
2009-05-01 11:08 ` Jamie Lokier
2009-05-01 14:28 ` Christoph Hellwig
2009-05-01 14:28 ` Christoph Hellwig
2009-05-05 5:21 ` Rusty Russell
2009-05-05 5:21 ` Rusty Russell
2009-04-28 19:09 ` Christian Borntraeger
2009-04-28 19:09 ` Christian Borntraeger
2009-04-29 10:50 ` Christoph Hellwig
2009-04-29 10:50 ` Christoph Hellwig
2009-04-29 11:07 ` Christian Borntraeger
2009-04-29 11:07 ` Christian Borntraeger
2009-04-28 9:57 ` [PATCH 2/2] virtio-blk: add SG_IO " Christoph Hellwig
2009-04-28 9:57 ` [Qemu-devel] " Christoph Hellwig
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