On Fri, 2022-01-14 at 11:59 -0600, Nathan Lynch wrote: > Haren Myneni <ha...@linux.ibm.com> writes: > > > Before migration starts, all secondary CPUs will be offline which > > can invoke VAS DLPAR event. > > I don't understand this statement, so I can't evaluate the patch. The > current LPM implementation does not offline any CPUs.
Thanks for your comment. My mistake.. VAS notifier with of_reconfig_notifier_register() is called during migration for other events. VAS notifier has a bug ( https://lists.ozlabs.org/pipermail/linuxppc-dev/2021-December/238333.html ) and will fix it: if ((action == OF_RECONFIG_ATTACH_NODE) || (action == OF_RECONFIG_DETACH_NODE)) intserv = of_get_property(dn, "ibm,ppc-interrupt-server#s", &len); As the current LPM notifier does not freeze the system, thought of ignoring DLPAR CPU hotplug event with this migration_in_progress flag. I will fix this as well and repost DLPAR NXGZIP series. Thanks Haren
