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Re: [Qemu-devel] TSC frequency configuration & invtsc migration (was Re:
From: |
Marcelo Tosatti |
Subject: |
Re: [Qemu-devel] TSC frequency configuration & invtsc migration (was Re: [PATCH 4/4] kvm: Allow migration with invtsc) |
Date: |
Thu, 5 Jan 2017 08:50:48 -0200 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Thu, Jan 05, 2017 at 08:48:32AM -0200, Marcelo Tosatti wrote:
> > Note that even if we follow your suggestion and implement an
> > alternative version of patch 4/4 to cover your use case, I will
> > strongly recommend libvirt developers to support configuring TSC
> > frequency if they want to support invtsc + migration without
> > surprising/unpredictable restrictions on migratability.
>
> Well, alright. If you make the TSC frequency of the host
> available to mgmt software as you describe, and write the steps mgmt
> software should take, i'm good.
>
> Thanks for the help Eduardo.
>
I'll be happy to not have to add a weird script to
1. Query the host TSC frequency.
2. Pass that to -cpu xxx,tsc-frequency=ZZZ
To my migration scripts.
Probably easy to make that the default behaviour...
- Re: [Qemu-devel] [PATCH 4/4] kvm: Allow migration with invtsc, Marcelo Tosatti, 2017/01/04
- Re: [Qemu-devel] [PATCH 4/4] kvm: Allow migration with invtsc, Eduardo Habkost, 2017/01/04
- [Qemu-devel] TSC frequency configuration & invtsc migration (was Re: [PATCH 4/4] kvm: Allow migration with invtsc), Eduardo Habkost, 2017/01/04
- Re: [Qemu-devel] TSC frequency configuration & invtsc migration (was Re: [PATCH 4/4] kvm: Allow migration with invtsc), Marcelo Tosatti, 2017/01/04
- Re: [Qemu-devel] TSC frequency configuration & invtsc migration (was Re: [PATCH 4/4] kvm: Allow migration with invtsc), Eduardo Habkost, 2017/01/04
- Re: [Qemu-devel] TSC frequency configuration & invtsc migration (was Re: [PATCH 4/4] kvm: Allow migration with invtsc), Marcelo Tosatti, 2017/01/05
- Re: [Qemu-devel] TSC frequency configuration & invtsc migration (was Re: [PATCH 4/4] kvm: Allow migration with invtsc),
Marcelo Tosatti <=
- Re: [Qemu-devel] TSC frequency configuration & invtsc migration (was Re: [PATCH 4/4] kvm: Allow migration with invtsc), Eduardo Habkost, 2017/01/05
- Re: [Qemu-devel] [libvirt] TSC frequency configuration & invtsc migration (was Re: [PATCH 4/4] kvm: Allow migration with invtsc), Daniel P. Berrange, 2017/01/05
- Re: [Qemu-devel] [libvirt] TSC frequency configuration & invtsc migration (was Re: [PATCH 4/4] kvm: Allow migration with invtsc), Eduardo Habkost, 2017/01/05
- Re: [Qemu-devel] [libvirt] TSC frequency configuration & invtsc migration (was Re: [PATCH 4/4] kvm: Allow migration with invtsc), Daniel P. Berrange, 2017/01/05
- Re: [Qemu-devel] [libvirt] TSC frequency configuration & invtsc migration (was Re: [PATCH 4/4] kvm: Allow migration with invtsc), Eduardo Habkost, 2017/01/05
- Re: [Qemu-devel] [libvirt] TSC frequency configuration & invtsc migration (was Re: [PATCH 4/4] kvm: Allow migration with invtsc), Paolo Bonzini, 2017/01/10
- Re: [Qemu-devel] TSC frequency configuration & invtsc migration (was Re: [PATCH 4/4] kvm: Allow migration with invtsc), Marcelo Tosatti, 2017/01/06
- [Qemu-devel] How to make dest host abort migration safely (was Re: [PATCH 4/4] kvm: Allow migration with invtsc), Eduardo Habkost, 2017/01/08
- Re: [Qemu-devel] How to make dest host abort migration safely (was Re: [PATCH 4/4] kvm: Allow migration with invtsc), Dr. David Alan Gilbert, 2017/01/09
- [Qemu-devel] Exporting kvm_max_guest_tsc_khz to userspace (was Re: [PATCH 4/4] kvm: Allow migration with invtsc), Eduardo Habkost, 2017/01/08