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Wed, 4 Mar 2026 08:07:19 +0000 (GMT) Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=UTF-8 Date: Wed, 04 Mar 2026 09:07:14 +0100 Message-Id: From: "Christoph Schlameuss" Cc: , , , , , , , , , , To: "Claudio Imbrenda" , Subject: Re: [PATCH v1 1/1] KVM: s390: Fix a deadlock X-Mailer: aerc 0.21.0 References: <20260303175206.72836-1-imbrenda@linux.ibm.com> In-Reply-To: <20260303175206.72836-1-imbrenda@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: qvAtrHut1EDav7Q-zPUFpP4Qsbfl3Prr X-Authority-Analysis: v=2.4 cv=b66/I9Gx c=1 sm=1 tr=0 ts=69a7e83c cx=c_pps a=5BHTudwdYE3Te8bg5FgnPg==:117 a=5BHTudwdYE3Te8bg5FgnPg==:17 a=IkcTkHD0fZMA:10 a=Yq5XynenixoA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=V8glGbnc2Ofi9Qvn3v5h:22 a=VnNF1IyMAAAA:8 a=nFlhKrqNoRUYweW6QhYA:9 a=QEXdDO2ut3YA:10 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzA0MDA2MSBTYWx0ZWRfX7xhsWYancw0I LH1EDiIMvqFuynU+iCLzFUxVMnGTlx8iiln+pOfg7irsoJL/0znD2nWfSdqFcGsYOVnbEG5br8c zcUUnuRjG0slPDBWl4iBLpdxavP3MMECuwDJaiFchYntWekDjfH4eJF5VZAs7ZGQ0Q5LGJo/h7Y wkRk0MxH3JjdkFGy1rGKgmUG97Hf26YuocBrGZHzrfBXE4bO0upoLIbjwioOf7viWOgqdrE/+Mw JKzNr1CFjrM21y8PZ6yIGtlaXxXhook30CBfzqWhgHizqw8HWnAnWlD4Zn9qE74j+L4/KRAmlSi hSZ/y2GTau/pmcOvQk4eXjQIkzDhSjjJ6lkQHTuEkqF5vn4aznWerzNkZFUddDHPGpp0C1GXBE1 VM9StawclopdTRm2hWeaGeagJQFk8Jni0bFGed0/Z9FOPXFOc8d9wpo7f4aYk7TMUDcXgkA4PGr hiJbxHVUOY+cOVPZhCg== X-Proofpoint-GUID: qvAtrHut1EDav7Q-zPUFpP4Qsbfl3Prr 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=2026-03-04_02,2026-03-03_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 lowpriorityscore=0 phishscore=0 clxscore=1015 adultscore=0 bulkscore=0 impostorscore=0 malwarescore=0 spamscore=0 priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2602130000 definitions=main-2603040061 On Tue Mar 3, 2026 at 6:52 PM CET, Claudio Imbrenda wrote: > In some scenarios, a deadlock can happen, involving _do_shadow_pte(). > > Convert all usages of pgste_get_lock() to pgste_get_trylock() in > _do_shadow_pte() and return -EAGAIN. All callers can already deal with > -EAGAIN being returned. > > Signed-off-by: Claudio Imbrenda > Fixes: e38c884df921 ("KVM: s390: Switch to new gmap") Reviewed-by: Christoph Schlameuss