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Mon, 23 Feb 2026 14:52:56 +0000 (GMT) Date: Mon, 23 Feb 2026 15:52:55 +0100 From: Gerald Schaefer To: Sasha Levin Cc: stable@vger.kernel.org, stable-commits@vger.kernel.org, Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle Subject: Re: Patch "s390: select ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP" has been added to the 6.1-stable tree Message-ID: <20260223155255.41342222@thinkpad-T15> In-Reply-To: <20260222235114.1339059-1-sashal@kernel.org> References: <20260222235114.1339059-1-sashal@kernel.org> X-Mailer: Claws Mail 4.3.1 (GTK 3.24.49; x86_64-redhat-linux-gnu) Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: fO-mq18CAoL5tkeVQY6PoIQj_IlyO9DX X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMjIzMDEyNiBTYWx0ZWRfX5SZLR418r+Re rzm4BGolz//TeGQuMaI056/SrpJjzKOj53oBb/deUMmmneI5SmTsshh8Bt9aGg89pdeMBjO+Ys7 Knk/93o9frkNXLysGCph6VpaCYwNZmkP5TP17ug8fxjP9FsX1J+w2rYYSFidKcvu/Hj8O8mY+lN kXq0J8KFXMGc47I3gYOEJAE2ffhre4j1L2EF+CbF4qLXK/0k6Xw7oHc9nW8qPUALMJD6OgtcUD3 HJYQf6EJ83+KcG5Wv/IPHcT60eaL3H9FNfuqymAP3LOus5gKDdRJ5/FP4DthYEWe/Az0jiO47bp APiNuXEkJy0NgyakJj/dBRICd6Jfy74vBqwSPgLWfNm8yC0dTetpBVsoqd/7zwdw03WAV7Kzr1K oRn1NcKQf5gt+AA6X5MfGfrz86YC1M/68RHamIYJCjrFF+qtmwcMHcjrraRCqWIOoRyS8m1/amp CXa90QmKfMgSA+hYRKQ== X-Proofpoint-GUID: fO-mq18CAoL5tkeVQY6PoIQj_IlyO9DX X-Authority-Analysis: v=2.4 cv=bbBmkePB c=1 sm=1 tr=0 ts=699c69ce cx=c_pps a=AfN7/Ok6k8XGzOShvHwTGQ==:117 a=AfN7/Ok6k8XGzOShvHwTGQ==:17 a=kj9zAlcOel0A:10 a=HzLeVaNsDn8A:10 a=VkNPw1HP01LnGYTKEx00:22 a=Mpw57Om8IfrbqaoTuvik:22 a=GgsMoib0sEa3-_RKJdDe:22 a=VwQbUJbxAAAA:8 a=uKtpUWve3L976CWnQ48A:9 a=CjuIK1q_8ugA:10 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-02-23_03,2026-02-23_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 bulkscore=0 adultscore=0 impostorscore=0 lowpriorityscore=0 priorityscore=1501 suspectscore=0 clxscore=1011 phishscore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2601150000 definitions=main-2602230126 On Sun, 22 Feb 2026 18:51:14 -0500 Sasha Levin 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 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. Thanks, Gerald