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From:   Christian Borntraeger <borntraeger@linux.ibm.com>
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 <mhartmay@linux.ibm.com>
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>
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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