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Tue, 19 May 2026 11:57:24 +0000 (GMT) Received: from [9.52.200.39] (unknown [9.52.200.39]) by smtpav05.fra02v.mail.ibm.com (Postfix) with ESMTP; Tue, 19 May 2026 11:57:24 +0000 (GMT) Message-ID: Date: Tue, 19 May 2026 13:57:24 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 5/5] KVM: s390: Properly reset zero bit in PGSTE To: Claudio Imbrenda Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-s390@vger.kernel.org, frankja@linux.ibm.com, david@kernel.org, seiden@linux.ibm.com, nrb@linux.ibm.com, schlameuss@linux.ibm.com, gra@linux.ibm.com References: <20260512175251.300882-1-imbrenda@linux.ibm.com> <20260512175251.300882-6-imbrenda@linux.ibm.com> <0f114ba1-72f6-4ffb-b179-01b8baaaec4c@de.ibm.com> <20260519133836.0d344247@p-imbrenda> Content-Language: en-US From: Christian Borntraeger In-Reply-To: <20260519133836.0d344247@p-imbrenda> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNTE5MDExNSBTYWx0ZWRfX+HTHtMc55MnX rD81FgQMWsb8zqkWEuXeH/pCALRuKSoO1seFQ4jDMEagvcColwp1WYhIIbfS5/ZwUNaeayev8Qt Ljd9M6oXB27KlaN7EmczeGLvRc3/VvFjnACmYB1xmsXqbv6J9QbHUppOayCdxwFUtYkXi6wZDat xYehAv54FrmMoPATYC35cicRJLwGlHjEm68T8PjziMVQB4wCGoZKJOvwKoVWI4xSyL+8HSJLYGQ swVDKsr4kIU70ZeCBp9YigkZVQmW1mLnAhpPXEarWksZDWOE0czyk+kMyvJDL6WniGcATM05aqX 0xH72M6I0yA3Tm1jzs+55Z3SKe6Bkasv9duVbTB9vi6+9fkw0CdvECZZvl9O6F9L6DRohoUBsaN 1XbNq6mdv4+0zJRdCoT90NW5nFX0ZqjxFsTv+LotlwMAEo2mSGgK2T67HHDTS9xAxDJciYWr14n Qt4yxMCEX3GB7gYKHGA== X-Authority-Analysis: v=2.4 cv=BNuDalQG c=1 sm=1 tr=0 ts=6a0c5029 cx=c_pps a=bLidbwmWQ0KltjZqbj+ezA==:117 a=bLidbwmWQ0KltjZqbj+ezA==:17 a=IkcTkHD0fZMA:10 a=NGcC8JguVDcA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=iQ6ETzBq9ecOQQE5vZCe:22 a=VnNF1IyMAAAA:8 a=RguYKKiWQpcrlkvWGWkA:9 a=QEXdDO2ut3YA:10 X-Proofpoint-ORIG-GUID: 4bXi4EVMmhJTLhP-WCdc7aITie_VuIFz X-Proofpoint-GUID: 4bXi4EVMmhJTLhP-WCdc7aITie_VuIFz X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-05-19_03,2026-05-18_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 priorityscore=1501 malwarescore=0 impostorscore=0 suspectscore=0 lowpriorityscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2605130000 definitions=main-2605190115 Am 19.05.26 um 13:38 schrieb Claudio Imbrenda: > On Mon, 18 May 2026 13:44:45 +0200 > Christian Borntraeger wrote: > >> Am 12.05.26 um 19:52 schrieb Claudio Imbrenda: >>> When calling _gmap_ptep_xchg(), always clear the pgste.zero bit. This >>> prevents the page from being accidentally discarded when getting >>> unmapped. >> >> Ideally have some example in the patch description, that makes review easier.> > > will do > >>> Signed-off-by: Claudio Imbrenda >> >> Was this broken before the rework as well? Do we need a stable backport into 6.19 >> and older? > > no, this breakage is a product of the gmap rewrite Then please add a Fixes tag.