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Re: [Qemu-devel] [RFC V2 10/10] cpus: reclaim allocated vCPU objects
From: |
Bharata B Rao |
Subject: |
Re: [Qemu-devel] [RFC V2 10/10] cpus: reclaim allocated vCPU objects |
Date: |
Fri, 12 Sep 2014 13:39:17 +0530 |
On Fri, Sep 12, 2014 at 6:54 AM, Gu Zheng <address@hidden> wrote:
> Is guest os enabled acpi cpu hotplug? What's the guest's cpu info?
> Please try latest QEMU, and any feedback is welcome.
>
Tried with latest QEMU git + your patchset and Fedora 20 guest, but
QEMU monitor still shows the removed CPU.
Guest kernel messages during hotplug:
address@hidden cpu]# echo 1 > cpu8/online
[ 72.936069] smpboot: Booting Node 0 Processor 8 APIC 0x8
[ 0.003000] kvm-clock: cpu 8, msr 0:7ffc9201, secondary cpu clock
[ 72.950003] TSC synchronization [CPU#0 -> CPU#8]:
[ 72.950003] Measured 199886723309 cycles TSC warp between CPUs,
turning off TSC clock.
[ 72.950003] tsc: Marking TSC unstable due to check_tsc_sync_source failed
[ 72.972976] KVM setup async PF for cpu 8
[ 72.973648] kvm-stealtime: cpu 8, msr 7d30df00
[ 72.974415] Will online and init hotplugged CPU: 8
[ 72.975307] microcode: CPU8 sig=0x663, pf=0x1, revision=0x1
Guest kernel messages during hotunplug:
address@hidden cpu]# [ 95.482172] Unregister pv shared memory for cpu 8
[ 95.487169] smpboot: CPU 8 is now offline
[ 95.488667] ACPI: Device does not support D3cold
Guest cpuinfo (showing for the last CPU only after adding and removing CPU 8)
processor : 7
vendor_id : GenuineIntel
cpu family : 6
model : 6
model name : QEMU Virtual CPU version 2.1.50
stepping : 3
microcode : 0x1
cpu MHz : 2899.998
cache size : 4096 KB
fpu : yes
fpu_exception : yes
cpuid level : 4
wp : yes
flags : fpu de pse tsc msr pae mce cx8 apic sep mtrr pge mca
cmov pse36 clflush mmx fxsr sse sse2 syscall nx lm rep_good nopl pni
cx16 x2apic popcnt hypervisor lahf_lm
bogomips : 5799.99
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management:
address@hidden boot]# grep -ir hot config-3.11.10-301.fc20.x86_64
CONFIG_TICK_ONESHOT=y
# CONFIG_MEMORY_HOTPLUG is not set
CONFIG_HOTPLUG_CPU=y
# CONFIG_BOOTPARAM_HOTPLUG_CPU0 is not set
# CONFIG_DEBUG_HOTPLUG_CPU0 is not set
CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y
CONFIG_ACPI_HOTPLUG_CPU=y
CONFIG_HOTPLUG_PCI_PCIE=y
CONFIG_HOTPLUG_PCI=y
CONFIG_HOTPLUG_PCI_ACPI=y
CONFIG_HOTPLUG_PCI_ACPI_IBM=m
# CONFIG_HOTPLUG_PCI_CPCI is not set
CONFIG_HOTPLUG_PCI_SHPC=m
- Re: [Qemu-devel] [RFC V2 10/10] cpus: reclaim allocated vCPU objects, Igor Mammedov, 2014/09/09
- Re: [Qemu-devel] [RFC V2 10/10] cpus: reclaim allocated vCPU objects, Bharata B Rao, 2014/09/11
- Re: [Qemu-devel] [RFC V2 10/10] cpus: reclaim allocated vCPU objects, Gu Zheng, 2014/09/11
- Re: [Qemu-devel] [RFC V2 10/10] cpus: reclaim allocated vCPU objects, Anshul Makkar, 2014/09/11
- Re: [Qemu-devel] [RFC V2 10/10] cpus: reclaim allocated vCPU objects, Gu Zheng, 2014/09/11
- Re: [Qemu-devel] [RFC V2 10/10] cpus: reclaim allocated vCPU objects, Bharata B Rao, 2014/09/11
- Re: [Qemu-devel] [RFC V2 10/10] cpus: reclaim allocated vCPU objects, Gu Zheng, 2014/09/11
- Re: [Qemu-devel] [RFC V2 10/10] cpus: reclaim allocated vCPU objects,
Bharata B Rao <=
- Re: [Qemu-devel] [RFC V2 10/10] cpus: reclaim allocated vCPU objects, Gu Zheng, 2014/09/12
- Re: [Qemu-devel] [RFC V2 10/10] cpus: reclaim allocated vCPU objects, Bharata B Rao, 2014/09/12
- Re: [Qemu-devel] [RFC V2 10/10] cpus: reclaim allocated vCPU objects, Anshul Makkar, 2014/09/12
- Re: [Qemu-devel] [RFC V2 10/10] cpus: reclaim allocated vCPU objects, Bharata B Rao, 2014/09/12
- Re: [Qemu-devel] [RFC V2 10/10] cpus: reclaim allocated vCPU objects, Anshul Makkar, 2014/09/12
- Re: [Qemu-devel] [RFC V2 10/10] cpus: reclaim allocated vCPU objects, Gu Zheng, 2014/09/15
- Re: [Qemu-devel] [RFC V2 10/10] cpus: reclaim allocated vCPU objects, Bharata B Rao, 2014/09/15
- Re: [Qemu-devel] [RFC V2 10/10] cpus: reclaim allocated vCPU objects, Anshul Makkar, 2014/09/15
- Re: [Qemu-devel] [RFC V2 10/10] cpus: reclaim allocated vCPU objects, Bharata B Rao, 2014/09/15
- Re: [Qemu-devel] [RFC V2 10/10] cpus: reclaim allocated vCPU objects, Anshul Makkar, 2014/09/15