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

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Message-ID: <20241205182008.2b36476a@mordecai.tesarici.cz>
Date: Thu, 5 Dec 2024 18:20:08 +0100
From: Petr Tesarik <ptesarik@...e.com>
To: Ryan Roberts <ryan.roberts@....com>
Cc: Andrew Morton <akpm@...ux-foundation.org>, Anshuman Khandual
 <anshuman.khandual@....com>, Ard Biesheuvel <ardb@...nel.org>, Catalin
 Marinas <catalin.marinas@....com>, David Hildenbrand <david@...hat.com>,
 Greg Marsden <greg.marsden@...cle.com>, Ivan Ivanov <ivan.ivanov@...e.com>,
 Kalesh Singh <kaleshsingh@...gle.com>, Marc Zyngier <maz@...nel.org>, Mark
 Rutland <mark.rutland@....com>, Matthias Brugger <mbrugger@...e.com>,
 Miroslav Benes <mbenes@...e.cz>, Will Deacon <will@...nel.org>,
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
 linux-mm@...ck.org
Subject: Re: [RFC PATCH v1 00/57] Boot-time page size selection for arm64

Hi Ryan,

On Thu, 17 Oct 2024 13:32:43 +0100
Ryan Roberts <ryan.roberts@....com> wrote:

> On 17/10/2024 13:27, Petr Tesarik wrote:
> > On Mon, 14 Oct 2024 11:55:11 +0100
> > Ryan Roberts <ryan.roberts@....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?

This project was de-prioritised for some time, but I have just returned
to it, and one of our test systems uses a Mellanox 5 NIC, which did not build.

If you still have time to work on your patch series, please, can you
look into enabling MLX5_CORE_EN?

Oh, and have you rebased the series to 6.12 yet?

Petr T