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RE: [Xen-users] GPLPV under NetBSD dom0

To: "Dustin Marquess" <dmarquess@xxxxxxxxx>, "xen-users" <xen-users@xxxxxxxxxxxxxxxxxxx>
Subject: RE: [Xen-users] GPLPV under NetBSD dom0
From: "James Harper" <james.harper@xxxxxxxxxxxxxxxx>
Date: Fri, 30 Oct 2009 10:35:33 +1100
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Thread-index: AcpY5BXiWHhdaRJNTpuBR31/hzD/cQAC82aw
Thread-topic: [Xen-users] GPLPV under NetBSD dom0
> XenPCI --> XenPci_XenConfigDeviceSpecifyBuffers
> XenPCI     testing path = device/vbd/768/device-type
> XenPCI     testing disk vs disk
> XenPCI     condition = 0
> XenPCI --> XenPci_ChangeFrontendState
> XenPCI --> XenPci_DeviceWatchHandler
> XenPCI <-- XenPci_DeviceWatchHandler
> XenPCI --> XenPci_UpdateBackendState
> XenPCI     state unchanged
> XenPCI     Still waiting for 2 (currently 4)...

Looks like my state transition code isn't quite compatible with NetBSD's
backend code.

Just as a test, and you'll have to be fast, as soon as you see 'Still
waiting for 2 (currently 4)', manually set the backend state to 2, and
then back to 4, eg:

xenstore-write /local/domain/0/backend/vbd/<domid>/768 2
xenstore-write /local/domain/0/backend/vbd/<domid>/768 4

GPLPV expects to see the backend state go to 2 and then to 4, not direct
to 4. I need to investigate that a bit more as it has caused problems
before with other backends (tap:aio etc) before.

If that works let me know and I'll see what I can do.

James

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