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

[Christophe Leroy]

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 ?

Thanks
Christophe