> I think that a simple solution to this is to just remove the first invocation.
This was checked in as c/s 19754.
Unluckily, this breaks device assignment for pv guest: xend would not invoke
setupOneDevice() for pv guest at all.
The attached patch fixes the issue. Please have a look.
From: Simon Horman [mailto:horms@xxxxxxxxxxxx]
Sent: 2009?6?15? 9:53
To: Cui, Dexuan
Subject: Re: [Xen-devel] RE: [Xen-changelog] [xen-unstable] xend: hot-plug PCI
devices at boot-time
On Fri, Jun 12, 2009 at 02:35:02PM +0800, Cui, Dexuan wrote:
> On Fri, Jun 12, 2009 at 14:34, Simon Horman wrote:
> > On Fri, Jun 12, 2009 at 01:51:10PM +0800, Cui, Dexuan wrote:
> > > Hi Simon,
> > > After this changeset, I find there are some new issues in the xend:
> > > I noticed in xend.log, setupOneDevice() is invoked twice,
> > > but actually I only statically assign 1 device to hvm guest.
> > >
> > > After looking into the xend code, I find in XendDomainInfo.py:
> > > _initDomain() -> _createDevices(), we invoke
> > > self._createDevice(devclass, config) that eventually invokes
> > > setupOneDevice() -- this is the first time;
> > > And later, still in _createDevices(), we invoke
> > > pci_device_configure_boot() -> pci_device_configure() ->
> > > dev_control.reconfigureDevice(devid, dev_config) ->
> > > xend/server/pciif.py:reconfigureDevice() -> setupOneDevice()
> > > -- this is the second time. Can you remove the duplicate invocation?
> > Sure, I will look into it ASAP.
> > Can I confirm which version of xen-unstable.hg and qemu-xen-unstable.git
> > you are using?
> I'm using the latest xen-unstable 19740, Dom0 898, ioemu
I think that a simple solution to this is to just remove the
xend: pass-through: Only call setupOneDevice() once per device
As observed by Dexuan Cui, when PCI devices are passed through at
domain-creation-time setupOneDevice() will be called twice.
Once via setupDevice() and once via econfigureDevice() which
is called in pci_device_configure().
This patch removes the first of these.
Cc: Dexuan Cui <dexuan.cui@xxxxxxxxx>
Cc: Masaki Kanno <kanno.masaki@xxxxxxxxxxxxxx>
Signed-off-by: Simon Horman <horms@xxxxxxxxxxxx>
--- xen-unstable.hg.orig/tools/python/xen/xend/server/pciif.py 2009-06-15
+++ xen-unstable.hg/tools/python/xen/xend/server/pciif.py 2009-06-15
@@ -436,8 +436,6 @@ class PciController(DevController):
' same guest with %s'
raise VmError(err_msg % (s, dev.name))
- for (domain, bus, slot, func) in pci_dev_list:
- self.setupOneDevice(domain, bus, slot, func)
wPath = '/local/domain/0/backend/pci/%u/0/aerState' % (self.getDomid())
self.aerStateWatch = xswatch(wPath, self._handleAerStateWatch)
log.debug('pci: register aer watch %s', wPath)
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