Re: [Xen-users] ARM: Xen on Vexpress

[Julien Grall <julien.grall@xxxxxxxxxx>]

On 06/11/2014 04:49 PM, Jeenu Viswambharan wrote:
> On Wed, Jun 11, 2014 at 16:39:51, Julien Grall wrote:
>> On 06/11/2014 04:10 PM, Ian Campbell wrote:
>>> And just to be clear we are talking about the load address of the
>>> kernel within the dom0 IPA space, aren't we? Not the host address
>>> where the kernel is loaded to be passed to Xen (it doesn't matter
>>> what that is really).
>>
>>> I remembered to had a similar issue on the Arndale a while a go.
>>> Linux is unable to allocate memory because either:
>>>         1) Linux is considering your memory is part of highmem
>>>         2) virt-phys is again bogus?
>>
>> I think we can safely ignore the latter one as Xen 4.4 has a
>> workaround to avoid it (see commit 6c21cb3 which as been revered on
>> upstream).
>>
>> For the former one, Linux is checking the memory in
>> sanity_check_meminfo (arch/arm/mm/mmu.c). You might want to check if
>> you have in your log message such as "Ignoring RAM"/"Truncating RAM".
> 
> Yes, I did have them when compiled without HIGHMEM, but went away when I
> enabled it. What is more suited - highmem enabled or disabled?

Does your dom0 boot with highmem disabled?

> Did you manage to work this problem around?

It might be another issue. I don't have any modification in the kernel
for the Arndale.

Regards,

-- 
Julien Grall

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