On Mon, Sep 15, 2014 at 12:09 PM, Gu Zheng <guz.f...@cn.fujitsu.com> wrote: > Hi Bharata, > On 09/12/2014 09:52 PM, Bharata B Rao wrote: > >> On Fri, Sep 12, 2014 at 4:23 PM, Anshul Makkar >> <anshul.mak...@profitbricks.com> wrote: >>> During plugging we can see this event: echo 1 > cpu8/online. >>> >>> But during unplugging , we can't see the event echo 0 > cpu8/online. >> >> That's because I didn't do that explicitly, was always trying to >> remove an online cpu from the monitor w/o explicitly offlining it from >> inside the guest. Either ways I still see the removed CPU being listed >> in QEMU monitor. >> >> I don't ever hit any of the below code paths during CPU removal: > > It seems that the guest OS did not call the "_EJ0" method. > Could you please dump the guest os' acpi dsdt, and check whether the "_EJ0" > method exists?
_EJ0 doesn't exist in my DSDT. > >> >> cpus.c: qemu_kvm_destroy_vcpu() >> cpus.c: x86_cpu_finalizefn() >> >> I see CPU_REMOVE() being called from above two routines. >> >> And neither does hw/acpi/cpu_hotplug.c:cpu_status_write() gets called >> here. Does the message "ACPI: Device does not support D3cold" guest >> kernel throws during hot removal is causing this behaviour here ? >> Guest kernel is 3.11.10, should I be on latest kernel ? > > I have tested the fedora 20 guest with the default kernel, it works well, > so the kernel should be fine. > One more question, is the guest kernel config the same as fedora 20's default > one? Yes, I am running the distro provided kernel. Regards, Bharata.
