Re: [RFC PATCH v1 00/57] Boot-time page size selection for arm64

Ryan Roberts
2024-10-17T12:37:22Z

On 17/10/2024 13:27, Petr Tesarik wrote:
> On Mon, 14 Oct 2024 11:55:11 +0100
> Ryan Roberts <ryan.roberts@arm.com> wrote:
>
>> [...]
>> The series is arranged as follows:
>>
>> - patch 1: Add macros required for converting non-arch code to support
>> boot-time page size selection
>> - patches 2-36: Remove PAGE_SIZE compile-time constant assumption from all
>> non-arch code
>
> I have just tried to recompile the openSUSE kernel with these patches
> applied, and I'm running into this:
>
> CC arch/arm64/hyperv/hv_core.o
> In file included from ../arch/arm64/hyperv/hv_core.c:14:0:
> ../include/linux/hyperv.h:158:5: error: variably modified ‘reserved2’ at file scope
> u8 reserved2[PAGE_SIZE - 68];
> ^~~~~~~~~
>
> It looks like one more place which needs a patch, right?

As mentioned in the cover letter, so far I've only converted enough to get the
defconfig *image* building (i.e. no modules). If you are compiling a different
config or compiling the modules for defconfig, you will likely run into these
types of issues.

That said, I do have some patches to fix Hyper-V, which Michael Kelley was kind
enough to send me.

I understand that Suse might be able to help with wider performance testing - if
that's the reason you are trying to compile, you could send me your config and
I'll start working on fixing up other drivers?

Thanks,
Ryan

>
> Petr T