Mike Wray wrote:
Compared to which field is it off by 1?
The VMX code creates its own event channel using
channel.eventChannel(), which will
allocate new ports. Possibly it should be reusing the existing control
channel port
instead? This might account for the off-by-one as ports are allocated
sequentially.
That seems to be the problem. If I add some logging, I see:
[2005-06-17 12:06:07 xend] INFO (channel:32) created event channel:
<EventChannel dom1:0:19 dom2:5:2>
[2005-06-17 12:06:07 xend] INFO (channel:32) created event channel:
<EventChannel dom1:0:20 dom2:5:3>
The first one is created here:
File "/usr/lib/python/xen/xend/XendDomain.py", line 276, in domain_create
dominfo = XendDomainInfo.create(self.dbmap, config)
File "/usr/lib/python/xen/xend/XendDomainInfo.py", line 159, in create
vm.construct(config)
File "/usr/lib/python/xen/xend/XendDomainInfo.py", line 501, in construct
self.construct_image()
File "/usr/lib/python/xen/xend/XendDomainInfo.py", line 547, in
construct_image
self.create_channel()
File "/usr/lib/python/xen/xend/XendDomainInfo.py", line 680, in
create_channel
self.store_channel = self.eventChannel("store_channel")
File "/usr/lib/python/xen/xend/XendDomainInfo.py", line 674, in
eventChannel
return EventChannel.restoreFromDB(db, 0, self.id)
File "/usr/lib/python/xen/xend/server/channel.py", line 59, in
restoreFromDB
evtchn = cls.interdomain(dom1, dom2, port1=port1, port2=port2)
The second is created here:
File "/usr/lib/python/xen/xend/XendDomain.py", line 276, in domain_create
dominfo = XendDomainInfo.create(self.dbmap, config)
File "/usr/lib/python/xen/xend/XendDomainInfo.py", line 159, in create
vm.construct(config)
File "/usr/lib/python/xen/xend/XendDomainInfo.py", line 502, in construct
self.configure()
File "/usr/lib/python/xen/xend/XendDomainInfo.py", line 884, in configure
self.create_devices()
File "/usr/lib/python/xen/xend/XendDomainInfo.py", line 704, in
create_devices
self.image.createDeviceModel()
File "/usr/lib/python/xen/xend/image.py", line 300, in createDeviceModel
self.device_channel = channel.eventChannel(0, self.vm.getDomain())
File "/usr/lib/python/xen/xend/server/channel.py", line 116, in
eventChannel
return EventChannel.interdomain(dom1, dom2, port1=port1, port2=port2)
Things get more interesting, because self.device_channel['port1'] for
the second channel returns 19 instead of 20.
Are there assumptions in the code that there must be only one
interdomain event channel between two domains?
-Arun
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