Re: Patch "s390: select ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP" has been added to the 6.1-stable tree

[Sasha Levin <sashal@kernel.org>]

On Mon, Feb 23, 2026 at 03:52:55PM +0100, Gerald Schaefer wrote:
>On Sun, 22 Feb 2026 18:51:14 -0500
>Sasha Levin <sashal@kernel.org> wrote:
>
>> This is a note to let you know that I've just added the patch titled
>>
>>     s390: select ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP
>>
>> to the 6.1-stable tree which can be found at:
>>     http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
>>
>> The filename of the patch is:
>>      s390-select-arch_want_hugetlb_page_optimize_vmemmap.patch
>> and it can be found in the queue-6.1 subdirectory.
>>
>> If you, or anyone else, feels it should not be added to the stable tree,
>> please let <stable@vger.kernel.org> know about it.
>
>Please don't add this to any stable tree. This feature is broken on s390,
>and it recently was removed upstream via commit 64e2f60f355e ("s390:
>Disable ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP"), which also had a Cc: stable
>and Fixes: 00a34d5a99c0.
>
>So we'd rather want commit 64e2f60f355e added to stable v6.2+, than
>adding the original commit 00a34d5a99c0 to older trees.

I'll drop the entire series from 6.1.

-- 
Thanks,
Sasha