From: "Daniel P. Berrange" <berrange@redhat.com>
To: Gerd Hoffmann <kraxel@redhat.com>
Cc: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [RfC PATCH] usb/vmstate: add parent dev path
Date: Fri, 26 Aug 2011 11:25:05 +0100 [thread overview]
Message-ID: <20110826102505.GI3944@redhat.com> (raw)
In-Reply-To: <1314353480-14169-1-git-send-email-kraxel@redhat.com>
On Fri, Aug 26, 2011 at 12:11:20PM +0200, Gerd Hoffmann wrote:
> ... to make vmstate id string truely unique with multiple host
> controllers, i.e. move from "1/usb-ptr" to "0000:00:01.3/1/usb-ptr"
> (usb tabled connected to piix3 uhci).
>
> Obvious problem with that is that it breaks migration from and to older
> versions, thats why it is RfC. I don't see any way to fix the issue
> without breaking though. So the question is how to deal with that best?
How about keeping the original naming *only* for devices on the first
USB controller. Since it was impossible to start a QEMU process with
2 USB controllers, migration compatibility does not matter for the
naming of devices on the 2nd, 3rd, 4th.... controller.
Daniel
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next prev parent reply other threads:[~2011-08-26 10:25 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-26 10:11 [Qemu-devel] [RfC PATCH] usb/vmstate: add parent dev path Gerd Hoffmann
2011-08-26 10:25 ` Daniel P. Berrange [this message]
2011-08-26 10:46 ` Gerd Hoffmann
-- strict thread matches above, loose matches on Subject: below --
2012-03-13 12:34 Gerd Hoffmann
2012-03-13 12:42 ` Paolo Bonzini
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