Kernel 4.7: PAGE_GUARDED and _PAGE_NO_CACHE

[Christian Zigotzky]

Aneesh,

Shall I bisect the kernel from the powerpc git?

git clone 
https://kernel.googlesource.com/pub/scm/linux/kernel/git/powerpc/linux

https://git.kernel.org/cgit/linux/kernel/git/powerpc/linux.git/log/

Shall I start with the following commit?

https://git.kernel.org/cgit/linux/kernel/git/powerpc/linux.git/commit/?id=8ffb4103f5e28d7e7890ed4774d8e009f253f56e

Thanks,

Christian

On 04 June 2016 at 4:42 PM, Aneesh Kumar K.V wrote:
>
> Are you looking for changes too kernel that will add ISA 3.0 MMU model
> without making changes to other part of kernel ?. I don't think we ever
> had a kernel patch which did the ISA 3.0 work like that. In order to add
> the new ISA support we did have to make changes to other part of the
> kernel.
>
> To debug your boot issue, I still haven't understood why the suggested
> changes are not working. Because for a  non cache guarded page the
> mapping didn't change at all. Hence I was asking for what the expected
> WIMG values are for your board.
>
> One other option is to bisect test the kernel and if you can isolate
> which patch is breaking the boot, we can possibly understand it better.
> ie, instead of reverting the entire merge, try a git bisect.
>
> -aneesh
>
>