Re: [Xen-devel] arm: alloc_heap_pages allocates already allocated page

[Vijay Kilari <vijay.kilari@xxxxxxxxx>]

On Tue, Feb 7, 2017 at 4:58 PM, Julien Grall <julien.grall@xxxxxxx> wrote:
> On 07/02/2017 11:10, Vijay Kilari wrote:
>>
>> On Tue, Feb 7, 2017 at 3:37 PM, Julien Grall <julien.grall@xxxxxxx> wrote:
>>>
>>> On 07/02/2017 08:18, Vijay Kilari wrote:
>>>>
>>>>    I am seeing below panic with NUMA during DT mappings in
>>>> alloc_heap_pages()
>>>> BUG_ON(pg[i].count_info != PGC_state_free);
>>>> However, this issue is not there with 4.7 version. The same NUMA board
>>>> boots fine.
>>>
>>>
>>>
>>> I am a bit confused by what you are saying. Xen on ARM does not yet
>>> support
>>> NUMA. I also know you are working on NUMA support. So does the BUG happen
>>> on
>>> upstream xen or upstream xen + your patches?
>>
>>
>> I was testing with Andre ITS patches (RFC version 1) + my NUMA patches
>> + upstream xen.
>> However now I tested with upstream xen + Andre ITS patches (staging
>> branch) on NUMA board.
>
>
> The RFC v1 is quite an old version. Please give a try using the latest
> version [1].
>
>> I see panic (similar to what I see with my patches). Log are here.
>
>
> Well the panic is different now. An ASSERT in list_del is hit this time.
> This looks like a memory corruption to me.
>
>>
>> http://pastebin.com/QJqUBvD9
>>
>> The same plain upstream xen + Andre ITS patches boots fine with non-NUMA
>> board.
>
>
> I know that DOM0 cannot boot without ITS on your platform. But as you don't
> reach DOM0, have you tried to boot without the ITS series on NUMA board?

Yes, without ITS patches it is previously (first) reported panic at
"Xen BUG at page_alloc.c:827"

>
> Regards,
>
> [1] https://lists.xen.org/archives/html/xen-devel/2017-01/msg03276.html
>
> --
> Julien Grall

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