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Re: [Qemu-devel] [RFC PATCH] spapr: support time base offset migration
From: |
Alexander Graf |
Subject: |
Re: [Qemu-devel] [RFC PATCH] spapr: support time base offset migration |
Date: |
Thu, 5 Sep 2013 17:11:29 +0200 |
On 05.09.2013, at 16:26, Benjamin Herrenschmidt wrote:
> On Thu, 2013-09-05 at 16:14 +0200, Andreas Färber wrote:
>
>> Are you thinking of POWER8 having a different frequency than POWER8 in
>> compat mode? Because migration from one -cpu to another is not supported
>> elsewhere.
>>
>> Even if we want to migrate from one POWER7 revision to another, we
>> should let the destination use the revision of the source (guest ABI!),
>> via property if need be. Anything else will lead to confusion as to what
>> is supported and what is not. That -cpu host is the default for
>> convenience shouldn't relieve admins/libvirt to think about sensible
>> setups like they have to on x86.
>
> Besides POWER8 uses 512Mhz too :-) It's been architected so it's
> unlikely to change from now on.
Ok, ditch the tb frequency then. We can always default to 512Mhz when it's
absent.
Alex
- Re: [Qemu-devel] [RFC PATCH] spapr: support time base offset migration, (continued)
- Re: [Qemu-devel] [RFC PATCH] spapr: support time base offset migration, Alexey Kardashevskiy, 2013/09/05
- Re: [Qemu-devel] [RFC PATCH] spapr: support time base offset migration, Alexander Graf, 2013/09/05
- Re: [Qemu-devel] [RFC PATCH] spapr: support time base offset migration, Alexey Kardashevskiy, 2013/09/05
- Re: [Qemu-devel] [RFC PATCH] spapr: support time base offset migration, Alexander Graf, 2013/09/05
- Re: [Qemu-devel] [RFC PATCH] spapr: support time base offset migration, Benjamin Herrenschmidt, 2013/09/05
- Re: [Qemu-devel] [RFC PATCH] spapr: support time base offset migration, Alexander Graf, 2013/09/05
- Re: [Qemu-devel] [RFC PATCH] spapr: support time base offset migration, Benjamin Herrenschmidt, 2013/09/05
- Re: [Qemu-devel] [RFC PATCH] spapr: support time base offset migration, Alexander Graf, 2013/09/05
- Re: [Qemu-devel] [RFC PATCH] spapr: support time base offset migration, Andreas Färber, 2013/09/05
- Re: [Qemu-devel] [RFC PATCH] spapr: support time base offset migration, Benjamin Herrenschmidt, 2013/09/05
- Re: [Qemu-devel] [RFC PATCH] spapr: support time base offset migration,
Alexander Graf <=
- Re: [Qemu-devel] [RFC PATCH] spapr: support time base offset migration, Alexey Kardashevskiy, 2013/09/08
- Re: [Qemu-devel] [RFC PATCH] spapr: support time base offset migration, Alexander Graf, 2013/09/09
- Re: [Qemu-devel] [RFC PATCH] spapr: support time base offset migration, Alexey Kardashevskiy, 2013/09/09
- Re: [Qemu-devel] [RFC PATCH] spapr: support time base offset migration, Alexander Graf, 2013/09/09
- Re: [Qemu-devel] [RFC PATCH] spapr: support time base offset migration, Benjamin Herrenschmidt, 2013/09/09
- Re: [Qemu-devel] [RFC PATCH] spapr: support time base offset migration, Alexander Graf, 2013/09/09
- Re: [Qemu-devel] [RFC PATCH] spapr: support time base offset migration, Benjamin Herrenschmidt, 2013/09/09
- Re: [Qemu-devel] [RFC PATCH] spapr: support time base offset migration, Alexander Graf, 2013/09/09
- Re: [Qemu-devel] [RFC PATCH] spapr: support time base offset migration, David Gibson, 2013/09/13
- Re: [Qemu-devel] [RFC PATCH] spapr: support time base offset migration, Alexander Graf, 2013/09/13