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Re: [Qemu-devel] [PATCH 1/2] sched: add virt sched domain for the guest
From: |
Liu ping fan |
Subject: |
Re: [Qemu-devel] [PATCH 1/2] sched: add virt sched domain for the guest |
Date: |
Wed, 23 May 2012 16:34:03 +0800 |
On Wed, May 23, 2012 at 4:23 PM, Peter Zijlstra <address@hidden> wrote:
> On Wed, 2012-05-23 at 16:10 +0800, Liu ping fan wrote:
>> the movement of vcpu
>> threads among host nodes will break the topology initialized by -numa
>> option.
>
> You want to remap vcpu to nodes? Are you bloody insane? cpu:node maps
> are assumed static, you cannot make that a dynamic map and pray things
> keep working.
>
> Also, have you any idea how expensive it is to rebuild the topology vs
> migrating the vcpu?
>
No, do not rebuild the topology too frequently. Supposing vcpus in
node-A/B/C, now node-B is unplugged,
so we need to migrate some of vcpus from node-B to node-A, or to node-C.
>
- [Qemu-devel] [RFC] kvm: export host NUMA info to guest's scheduler, Liu Ping Fan, 2012/05/23
- [Qemu-devel] [PATCH 1/2] sched: add virt sched domain for the guest, Liu Ping Fan, 2012/05/23
- Re: [Qemu-devel] [PATCH 1/2] sched: add virt sched domain for the guest, Peter Zijlstra, 2012/05/23
- Re: [Qemu-devel] [PATCH 1/2] sched: add virt sched domain for the guest, Liu ping fan, 2012/05/23
- Re: [Qemu-devel] [PATCH 1/2] sched: add virt sched domain for the guest, Peter Zijlstra, 2012/05/23
- Re: [Qemu-devel] [PATCH 1/2] sched: add virt sched domain for the guest,
Liu ping fan <=
- Re: [Qemu-devel] [PATCH 1/2] sched: add virt sched domain for the guest, Peter Zijlstra, 2012/05/23
- Re: [Qemu-devel] [PATCH 1/2] sched: add virt sched domain for the guest, Liu ping fan, 2012/05/23
- Re: [Qemu-devel] [PATCH 1/2] sched: add virt sched domain for the guest, Peter Zijlstra, 2012/05/23
- Re: [Qemu-devel] [PATCH 1/2] sched: add virt sched domain for the guest, Dave Hansen, 2012/05/23
- Re: [Qemu-devel] [PATCH 1/2] sched: add virt sched domain for the guest, Peter Zijlstra, 2012/05/23
[Qemu-devel] [PATCH 2/2] sched: add virt domain device's driver, Liu Ping Fan, 2012/05/23
[Qemu-devel] [PATCH] kvm: collect vcpus' numa info for guest's scheduler, Liu Ping Fan, 2012/05/23
[Qemu-devel] [PATCH] Qemu: add virt sched domain device, Liu Ping Fan, 2012/05/23