Keir Fraser-3 wrote:
>
> On 17/05/2010 06:57, "James (song wei)" <jsong@xxxxxxxxxx> wrote:
>
>>
>> If doing save or snapshot at the time of kernel loading of a HVN vm,
>> event_channel haven't been initialized, so that make this saving with
>> xenstore. a string named "suspend" not "suspended" will be sent to xend
>> from checkpoint thread.
>> But in the shutdown function with parameter "suspend" think this request
>> should shutdown this hvm guest, but obviously, this is not the
>> expectation
>> of save or snapshot.
>
>>>I don't really understand this patch comment, and the solution just looks
>>>like a poor hack which noone in future will be able to fathom.
>
> Keir,
> Sorry for not descripting this issue clearly. When I do save at the
> beginning of HVM guest booting(first stage - loading kernel), I found
> guest os destoryed after saving completely. So I see the code and get this
> flow:
> xc_save()( here, call this function, when loading the kernel at the time
> of guest booting. Event channel haven't been initialized,so that go to
> compat_suspend() path in suspend()(save.c) -->> then, notify the thread
> named saveInputHandler in xend with a string "suspend". so that
> dominfo.shutdown is invoked.
> So, VM shutdown after do saving operator.
>
> -James (Song Wei)
>>
>> Signed-off-by:James (Song Wei) <jsong@xxxxxxxxxx>
>> diff -r baccadfd9418 tools/python/xen/xend/XendDomainInfo.py
>> --- a/tools/python/xen/xend/XendDomainInfo.py Fri May 14 08:05:05 2010
>> +0100
>> +++ b/tools/python/xen/xend/XendDomainInfo.py Mon May 17 13:56:15 2010
>> +0800
>> @@ -530,7 +530,7 @@
>> self.storeDom("control/shutdown", reason)
>>
>> # HVM domain shuts itself down only if it has PV drivers
>> - if self.info.is_hvm():
>> + if self.info.is_hvm() and reason != 'suspend':
>> hvm_pvdrv = xc.hvm_get_param(self.domid,
>> HVM_PARAM_CALLBACK_IRQ)
>> hvm_s_state = xc.hvm_get_param(self.domid,
>> HVM_PARAM_ACPI_S_STATE)
>> if not hvm_pvdrv or hvm_s_state != 0:
>
>
>
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> http://lists.xensource.com/xen-devel
>
>
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