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Fri, 23 Sep 2022 07:21:05 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.152.85.9]) by d06av23.portsmouth.uk.ibm.com (Postfix) with ESMTPS; Fri, 23 Sep 2022 07:21:05 +0000 (GMT) Received: by tuxmaker.boeblingen.de.ibm.com (Postfix, from userid 25651) id 0A192E08CE; Fri, 23 Sep 2022 09:21:05 +0200 (CEST) From: Christian Borntraeger To: peterz@infradead.org Cc: bigeasy@linutronix.de, dietmar.eggemann@arm.com, ebiederm@xmission.com, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, mgorman@suse.de, mingo@kernel.org, oleg@redhat.com, rjw@rjwysocki.net, rostedt@goodmis.org, tj@kernel.org, vincent.guittot@linaro.org, will@kernel.org, borntraeger@linux.ibm.com, Marc Hartmayer Subject: Re: [PATCH v3 6/6] freezer,sched: Rewrite core freezer logic Date: Fri, 23 Sep 2022 09:21:04 +0200 Message-Id: <20220923072104.2013212-1-borntraeger@linux.ibm.com> X-Mailer: git-send-email 2.37.3 In-Reply-To: <20220822114649.055452969@infradead.org> References: <20220822114649.055452969@infradead.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: lIJk0dvhlY7fehHnEgbZBjC-KFBu8Mqq X-Proofpoint-ORIG-GUID: SG7J-Wwp8bEpk6HnRKK6m5lbxEm-WBM_ X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.895,Hydra:6.0.528,FMLib:17.11.122.1 definitions=2022-09-23_02,2022-09-22_02,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 mlxlogscore=893 spamscore=0 bulkscore=0 phishscore=0 priorityscore=1501 lowpriorityscore=0 impostorscore=0 mlxscore=0 adultscore=0 malwarescore=0 clxscore=1011 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2209130000 definitions=main-2209230044 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Peter, as a heads-up. This commit (bisected and verified) triggers a regression in our KVM on s390x CI. The symptom is that a specific testcase (start a guest with next kernel and a poky ramdisk, then ssh via vsock into the guest and run the reboot command) now takes much longer (300 instead of 20 seconds). From a first look it seems that the sshd takes very long to end during shutdown but I have not looked into that yet. Any quick idea? Christian