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From: | Anthony Liguori |
Subject: | [Qemu-devel] Re: A new direction for vmchannel? |
Date: | Fri, 23 Jan 2009 14:58:56 -0600 |
User-agent: | Thunderbird 2.0.0.19 (X11/20090105) |
Gleb Natapov wrote:
On Fri, Jan 23, 2009 at 08:45:33AM -0600, Anthony Liguori wrote:Thoughts?Looks good, but I am not to much familiar with p9. Will it provide us with stream semantics?
Sure. It has read and write operations. You just have to implement them in the same sort of way you'd implement them for a character device.
How much work is needed to support this in Windows (what is your estimation)?
If you structure your guest applications to use a library, sort of like libsysfs, then on Windows, you could implement a 9P client in userspace. I have a 9P client that can be used for this. You just need some way to get the stream to userspace. You could write a virtio windows driver that exposed the stream down to userspace. You could also use an alternative transport for Windows (like a serial port).
Will migration be transparent to in guest users?
There's no better migration story for vmchannel backends implemented outside of QEMU. For the ones in QEMU, migration should be transparent.
Regards, Anthony Liguori
-- Gleb.
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