Re: arm: alloc_heap_pages allocates already allocated page

[Julien Grall <julien.grall@arm.com>]

On 07/02/2017 12:41, Vijay Kilari wrote:
> On Tue, Feb 7, 2017 at 4:58 PM, Julien Grall <julien.grall@arm.com> wrote:
>> On 07/02/2017 11:10, Vijay Kilari wrote:
>>>
>>> On Tue, Feb 7, 2017 at 3:37 PM, Julien Grall <julien.grall@arm.com> 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"

Can you please paste the full log from xen upstream (no debug, no ITS, 
no NUMA) and device tree memory node?

Also, please disable CONFIG_DEBUG_DEVICE_TREE it pollutes the logs and I 
don't think the option is necessary to solve this problem.

Cheers,

-- 
Julien Grall

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