Re: [RFC PATCH 00/17] virtual-bus

From: Andi Kleen
Date: Wed Apr 01 2009 - 12:59:43 EST


On Wed, Apr 01, 2009 at 10:19:49AM -0400, Gregory Haskins wrote:
> >>
> >
> > But surely you must have some specific use case in mind? Something
> > that it does better than the various methods that are available
> > today. Or rather there must be some problem you're trying
> > to solve. I'm just not sure what that problem exactly is.
> >
> Performance. We are trying to create a high performance IO infrastructure.

Ok. So the goal is to bypass user space qemu completely for better
performance. Can you please put this into the initial patch
description?

> So the administrator can then set these attributes as
> desired to manipulate the configuration of the instance of the device,
> on a per device basis.

How would the guest learn of any changes in there?

I think the interesting part would be how e.g. a vnet device
would be connected to the outside interfaces.

> So the admin would instantiate this "vdisk" device and do:
>
> 'echo /path/to/my/exported/disk.dat > /sys/vbus/devices/foo/src_path'

So it would act like a loop device? Would you reuse the loop device
or write something new?

How about VFS mount name spaces?

-Andi
--
ak@xxxxxxxxxxxxxxx -- Speaking for myself only.
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