linux-kernel - Re: Linux 6.18 amdgpu build error

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Message-ID: <5af4522e-30ab-4eec-a861-c2760cdabd4f@linuxfoundation.org>
Date: Wed, 3 Dec 2025 19:34:29 -0700
From: Shuah Khan <skhan@...uxfoundation.org>
To: Linus Torvalds <torvalds@...ux-foundation.org>,
 akpm@...ux-foundation.org, david@...nel.org
Cc: Alexander Deucher <Alexander.Deucher@....com>,
 Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
 amd-gfx@...ts.freedesktop.org, dri-devel <dri-devel@...ts.freedesktop.org>,
 Guenter Roeck <linux@...ck-us.net>,
 Linux Memory Management List <linux-mm@...ck.org>,
 Shuah Khan <skhan@...uxfoundation.org>
Subject: Re: Linux 6.18 amdgpu build error

On 12/3/25 18:06, Guenter Roeck wrote:
> On 12/3/25 14:16, Shuah Khan wrote:

>>
>> CONFIG_RANDSTRUCT is disabled and so are the GCC_PLUGINS in my config.
> 
> I guess that would have been too easy...
> 
>> I am also seeing issues with cloning kernel.org repos on my system after
>> a recent update:
>>
>> remote: Enumerating objects: 11177736, done.
>> remote: Counting objects: 100% (1231/1231), done.
>> remote: Compressing objects: 100% (624/624), done.
>> remote: Total 11177736 (delta 855), reused 781 (delta 606), pack-reused 11176505 (from 1)
>> Receiving objects: 100% (11177736/11177736), 3.01 GiB | 7.10 MiB/s, done.
>> Resolving deltas: 100% (9198323/9198323), done.
>> fatal: did not receive expected object 0002003e951b5057c16de5a39140abcbf6e44e50
>> fatal: fetch-pack: invalid index-pack output
>>
> 

Linus, Andrew, and David,

Finally figured this out. I narrowed it to  to be the HAVE_GIGANTIC_FOLIOS
support that went into Linux 6.18-rc6 in this commit:

 From 39231e8d6ba7f794b566fd91ebd88c0834a23b98 Mon Sep 17 00:00:00 2001
From: "David Hildenbrand (Red Hat)" <david@...nel.org>
Date: Fri, 14 Nov 2025 22:49:20 +0100
Subject: [PATCH] mm: fix MAX_FOLIO_ORDER on powerpc configs with hugetlb

This appears to be large change than the powerpc scope. It broke my workflow
completely. I sent a revert so this doesn't cause problems for others.

I can reproduce this problem om two systems - with this commit

git fetch-pack fails when cloning large repos and make hangs
or errors out of Makefile.build with Error: 139. These failures are
random with git clone failing after fetching 1% of the objects, and
make hangs while compiling random files

These failures are random and confusing sending me down the path of
looking at tool chain. Without this commit, I can clone and build
kernels on the two systems I was seeing problems.

thanks,
-- Shuah