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Mon, 15 Jun 2026 09:17:41 +0000 (GMT) Received: from p-imbrenda.ibmuc.com (unknown [9.111.31.49]) by smtpav03.fra02v.mail.ibm.com (Postfix) with ESMTP; Mon, 15 Jun 2026 09:17:41 +0000 (GMT) From: Claudio Imbrenda To: linux-kernel@vger.kernel.org Cc: kvm@vger.kernel.org, linux-s390@vger.kernel.org, borntraeger@de.ibm.com, frankja@linux.ibm.com, david@kernel.org, seiden@linux.ibm.com, nrb@linux.ibm.com, schlameuss@linux.ibm.com, gra@linux.ibm.com, hca@linux.ibm.com, gerald.schaefer@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, svens@linux.ibm.com Subject: [PATCH v2 0/1] s390/mm: Fix handling of _PAGE_UNUSED pte bit Date: Mon, 15 Jun 2026 11:17:40 +0200 Message-ID: <20260615091741.76724-1-imbrenda@linux.ibm.com> X-Mailer: git-send-email 2.54.0 Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Spam-Info: AW1haW4tMjYwNjE1MDA5MiBTYWx0ZWRfX0yxCaUnWVpOV X4qNR6agmH8bRnW1vdexUvIefXoMUTld8mCbnNQseLlOkT+f/UiJACZDpdAbqCF5Jn0V+i9bCoM tMQevCNC8hp7ojPu5uvU6oCCt+kmlVI= X-Proofpoint-ORIG-GUID: eJ_QV3R5bomO08t8VBy-kerJl-1DGEaP X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNjE1MDA5MiBTYWx0ZWRfXz06eqbQ00dMx 4GKoNZiZOVEKl5XKOm10PVLWrxigLj4VdAJdWlyPWDr6YokXnutadN/Wk1oCrwx+JVKnnLAwM9L nG4gSc54qCj0LIc5U8f3Dyt2pynqRPU3tjGc+tQrsrmfCCYx3WDLiMsIWJzVGKyNwP/E9nAY1Fc NwVr3GLiwNLo8n33wK9D835aCUA1x+24tZcTnq0Ck/oYGMsP+1x6616wZ/T7vryWNrOH4VppJGX CteQqNTv3K3BrdEjXzNCvpun5XNTBVtZ2a+nqSZXtsvBTShhVzEqDbS4PAtUXMzKvVNIlI5gwXq HwCWX18auAtqmNlyL6lIJURTeJOapQcOyfL8mpcdgIQr1bPfdJtV/D0MqXuwmZpuDdDLennGO+g rJXaITpo6bg7xs2V7nJP7ymQx8EtjzVhyV0K8Pub0xKDAVhwrVGkD9YysvABgTlRR5qjve1UAZm FWIZtHfJRWyJE6CokGg== X-Authority-Analysis: v=2.4 cv=U9uiy+ru c=1 sm=1 tr=0 ts=6a2fc33c cx=c_pps a=3Bg1Hr4SwmMryq2xdFQyZA==:117 a=3Bg1Hr4SwmMryq2xdFQyZA==:17 a=FelO9ux0wxsA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=uAbxVGIbfxUO_5tXvNgY:22 a=6evSrKiG03KN4j3D8AUA:9 X-Proofpoint-GUID: eJ_QV3R5bomO08t8VBy-kerJl-1DGEaP X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.125,FMLib:17.12.100.49 definitions=2026-06-15_02,2026-06-12_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 impostorscore=0 bulkscore=0 phishscore=0 priorityscore=1501 clxscore=1015 adultscore=0 malwarescore=0 suspectscore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606040000 definitions=main-2606150092 Fix handling of _PAGE_UNUSED pte bit. The bit was lingering around longer than it should have, causing issues. This patch replaces "s390/pgtable: Unconditionally clear _PAGE_UNUSED" which also solved the issue in practice, but in the wrong way. v1->v2: * Completely different approach, entirely new patch Claudio Imbrenda (1): s390/mm: Fix handling of _PAGE_UNUSED pte bit arch/s390/mm/gmap_helpers.c | 4 ++-- arch/s390/mm/pgtable.c | 6 ++++++ 2 files changed, 8 insertions(+), 2 deletions(-) -- 2.54.0