Re: [Qemu-arm] [PATCH v4 29/49] tests/tcg/arm: disable -p 32768 mmap test

[Richard Henderson]

On 05/17/2018 02:24 PM, Alex Bennée wrote:
> 
> Richard Henderson <address@hidden> writes:
> 
>> On 05/17/2018 10:46 AM, Alex Bennée wrote:
>>> Broken since I updated to 18.04
>>>
>>> Signed-off-by: Alex Bennée <address@hidden>
>>> ---
>>>  tests/tcg/arm/Makefile.target | 8 ++++++++
>>>  1 file changed, 8 insertions(+)
>>
>> Meh.  Most of these fail for hosts with 64k pages.
>> So, sure, disable this one, but I don't think that
>> the others are useful either.
> 
> I'm not entirely sure what the point of -p is meant to be. Is it just a
> performance hack for linux-user to have bigger pages? We are not using
> softmmu but I guess it affects the PageDesc structures?

I think it was just meant for testing, but I really have no idea.

If we actually had better support for mismatched host/guest page sizes, then
one could view -p as a way to choose between legitimate guest page sizes.  E.g.
8k, 16k, 64k are all legitimate for aarch64.


r~