Messages in this thread | | | Date | Mon, 26 Sep 2022 12:55:21 +0200 | Subject | Re: [PATCH v3 6/6] freezer,sched: Rewrite core freezer logic | From | Christian Borntraeger <> |
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Am 26.09.22 um 10:06 schrieb Christian Borntraeger: > > > Am 23.09.22 um 09:53 schrieb Christian Borntraeger: >> Am 23.09.22 um 09:21 schrieb Christian Borntraeger: >>> 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 >> >> the sshd seems to hang in virtio-serial (not vsock). > > FWIW, sshd does not seem to hang, instead it seems to busy loop in > wait_port_writable calling into the scheduler over and over again.
-#define TASK_FREEZABLE 0x00002000 +#define TASK_FREEZABLE 0x00000000
"Fixes" the issue. Just have to find out which of users is responsible.
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