Re: [Qemu-devel] sh : performance problem

[Shin-ichiro KAWASAKI <kawasaki@juno.dti.ne.jp>]

Lionel Landwerlin wrote:
> Le lundi 02 mars 2009 à 01:10 +0900, Shin-ichiro KAWASAKI a écrit :
>> Lionel Landwerlin wrote:
>>> Le dimanche 01 mars 2009 à 15:05 +0900, Shin-ichiro KAWASAKI a écrit :
>>>> Hi, Lionel.
>>>> Thank you for the response!
>>>>
>>>> Lionel Landwerlin wrote:
>>>>> Le vendredi 27 février 2009 à 01:28 +0900, Shin-ichiro KAWASAKI a
>>>>> écrit :
>>>>>
>>>>> Hi Shin-ichiro,
>>>>>
>>>>> I'm interested by your patch, but it does not apply on top of the r6215
>>>>> (qemu svn) + qemu-sh patches
>>>>> ( http://git.kernel.org/?p=virt/qemu/lethal/qemu-sh.git;a=summary) 
>>>>>
>>>>> Should I try on the last qemu svn ?
>>>> Yes.  When I send patch to qemu-devel ml, I make diff against
>>>> qemu main repository.  Could you try on it?
>>> Yes, I will.
>>>
>>> Do you know when the qemu-sh patches will be integrated to qemu ?
>> Nope.
>>
>> Sometimes the main developers afford some time for sh kindly, then
>> some of the patches in the qemu-sh staging repository are already
>> integrated.  But some patches are left. I guess they are busy on
>> other CPU archs.
>>
>> Especially, it's not a good time to apply patches which is not so
>> serious, because version cutting work is going now.
>>
>> Regards,
>> Shin-ichiro KAWASAKI
>>
>>
> 
> There is also one thing that is annoying me.
> 
> With the algorithm you proposed in your patch, you're not able anymore
> to raise the MMU_ITLB_MULTIPLE and MMU_DTLB_MULTIPLE exceptions. This
> makes the MMU emulation different from the real processor (even if
> thoses cases aren't even handled in Linux and probably others OS).
> 
> For example you can probably not map the same physical area with
> differents virtual page sizes.

Right.  I'll consider on it for next version of the patch.
Thank you!

Regards,
Shin-ichiro KAWASAKI