Re: [PATCH v7 16/23] powerpc/e500: Switch to 64 bits PGD on 85xx (32 bits)

[Guenter Roeck <linux@roeck-us.net>]

On 8/8/24 02:36, Christophe Leroy wrote:
> 
> 
> Le 07/08/2024 à 16:51, Guenter Roeck a écrit :
>> On 8/7/24 03:11, Christophe Leroy wrote:
>>> Hi,
>>>
>>> Le 31/07/2024 à 18:35, Guenter Roeck a écrit :
>>>> On 7/31/24 08:36, LEROY Christophe wrote:
>>>>>
>>>>> Hi Guenter,
>>>>> Thanks for this report. I'm afk this week, i"ll have a look at it in more détails next week.
>>>>> But to be sûre, does that Oops match the bisected commit ? Because pmd_leaf()  for e500 doesn't exist yet so pmd_write() shouldnt be called.
>>>>> I did validate all my changes with mpc8544 on qemu when i implemented this séries, using map_hugetlb mm selftest. What test tool are you using ?
>>>>
>>>> Nothing special; it is just a qemu boot test with various module test and debug options enabled,
>>>> using a root file system generated with buildroot.
>>>
>>> I still don't get anything with mpc85xx_defconfig.
>>>
>>> Can you tell with debug options you use and which module tests ?
>>>
>>
>> Please see https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fserver.roeck-us.net%2Fqemu%2Fppc-v6.11-rc2%2F&data=05%7C02%7Cchristophe.leroy%40csgroup.eu%7Cfd337af1375448bcda1508dcb6f06644%7C8b87af7d86474dc78df45f69a2011bb5%7C0%7C0%7C638586390853555531%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=7kihrxw5%2FrCI6TzmxGM56tEmghc1Bj7b1czXuM0%2BVrk%3D&reserved=0.
>>
> 
> Thanks,
> 
> CONFIG_SLUB_DEBUG_ON is what exhibits the problem.
> 
> I sent out a patch: https://patchwork.ozlabs.org/project/linuxppc-dev/patch/1cdaacb391cbd3e0240f0e0faf691202874e9422.1723109462.git.christophe.leroy@csgroup.eu/
> 
> With that patch I can successfully boot your config.
> 
> Can you give it a test ?
> 

Done; the patch fixes the problem for me.

Thanks!
Guenter