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Date: Thu, 19 Aug 2010 18:34:57 +0300
From: Avi Kivity <avi@redhat.com>
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Subject: Re: [Qemu-devel] Re: [PATCH] Fix bug for vcpu hotplug
References: <BC00F5384FCFC9499AF06F92E8B78A9E0B0007F9DC@shsmsx502.ccr.corp.intel.com>	<4C67D844.5060306@redhat.com>	<BC00F5384FCFC9499AF06F92E8B78A9E164C8CB831@shsmsx502.ccr.corp.intel.com>
	<4C6B8CC8.3040200@redhat.com> <4C6D4CA2.5060500@codemonkey.ws>
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To: Anthony Liguori <anthony@codemonkey.ws>
Cc: "Liu, Jinsong" <jinsong.liu@intel.com>, "Yang,
	Sheng" <sheng.yang@intel.com>, "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>, "kvm@vger.kernel.org" <kvm@vger.kernel.org>, "Li, Xin" <xin.li@intel.com>

  On 08/19/2010 06:24 PM, Anthony Liguori wrote:
> On 08/18/2010 02:33 AM, Avi Kivity wrote:
>>  On 08/18/2010 10:17 AM, Liu, Jinsong wrote:
>>> During test, we found qemu-kvm has a bug result in guestos shutdown 
>>> when vcpu hotadd.
>>> This patch is to fix the bug, allow hotplug for sysbus qdev.
>>>
>>> --- a/hw/qdev.c
>>> +++ b/hw/qdev.c
>>> @@ -108,6 +108,7 @@ DeviceState *qdev_create(BusState *bus, const 
>>> char *name)
>>>       if (!bus) {
>>>           if (!main_system_bus) {
>>>               main_system_bus = qbus_create(&system_bus_info, NULL, 
>>> "main-system-bus");
>>> +            main_system_bus->allow_hotplug = 1;
>>>           }
>>>           bus = main_system_bus;
>>>       }
>>
>>
>> Looks reasonable to me.
>
> Not really to me.
>
> SysBus does not support hotplugging and CPU hot plug shouldn't have 
> anything to do with qdev hotplug.
>
> Can you explain a bit more why this is needed?
>

On cpu hotplug an apic is added, and apics live on main_system_bus.

-- 
error compiling committee.c: too many arguments to function