[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Qemu-devel] Re: [PATCH] virtio-blk: add SGI_IO passthru support

From: Paul Brook
Subject: Re: [Qemu-devel] Re: [PATCH] virtio-blk: add SGI_IO passthru support
Date: Wed, 29 Apr 2009 12:11:19 +0100
User-agent: KMail/1.9.9

On Wednesday 29 April 2009, Christoph Hellwig wrote:
> 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.

Is this actually measurably faster, or just infinitesimally faster in theory?

I can maybe see that virtio-blk is slightly simpler for dumb drivers, though 
even then a basic scsi host is pretty straightforward and I find it hard to 
believe there's much real benefit.


reply via email to

[Prev in Thread] Current Thread [Next in Thread]