Re: [Qemu-devel] [PATCH V8 00/11] Add support for binding guest numa nodes to host numa nodes

[Wanlong Gao]

On 08/21/2013 05:22 PM, Paolo Bonzini wrote:
> Il 21/08/2013 11:08, Wanlong Gao ha scritto:
>>>>> Also, do you still need a "-m" option if you use "-numa mem"?
>>>>
>>>> The "-m" options will be used to compute the memory size of each node
>>>> if the memory size of each node is not set by "-numa mem" option. This
>>>> is also be consistent with the original concept.
>>>
>>> Ok.  You didn't answer my exact question though---could you run the
>>> above command line without "-m 2048"?
>>
>> Sorry :(
> 
> No problem!
> 
>> Sure not. And if the memory size assigned by "-m" option is not equal
>> the total memory size assigned by "-numa mem,", the ACPI will write the
>> wrong table, then the guest kernel will detect this and ignore the wrong
>> ACPI numa table and assume that all of the memory are belong to one node.
> 
> Can you make the code print a warning in this case, or fail to start the
> VM (if there is "-numa mem" but the total doesn't match "-m"?

You mean this?  
http://lists.nongnu.org/archive/html/qemu-devel/2013-05/msg03065.html
I sent a patch previously to do this, if you like I can merge to this patch set.

> 
>> Would you like to run without "-m" option in mind?
> 
> This would definitely be nice to have, if it's not too complicated.
> Otherwise, the above idea will do.

Yeah, but more complicated since we should make "-numa mem,size" and "-m"
options both optional.

Thanks,
Wanlong Gao

> 
> Paolo
>