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Re: [Qemu-devel] [QEMU PATCH v2 0/2]: KVM: i386: Add support for save an
From: |
Jim Mattson |
Subject: |
Re: [Qemu-devel] [QEMU PATCH v2 0/2]: KVM: i386: Add support for save and restore nested state |
Date: |
Fri, 2 Nov 2018 10:01:19 -0700 |
On Fri, Nov 2, 2018 at 9:58 AM, Daniel P. Berrangé <address@hidden> wrote:
> On Fri, Nov 02, 2018 at 09:44:54AM -0700, Jim Mattson via Qemu-devel wrote:
>> On Fri, Nov 2, 2018 at 5:59 AM, Liran Alon <address@hidden> wrote:
>> >
>>
>> >>> Therefore, I don't think that we want this versioning to be based on
>> >>> KVM_CAP at all.
>> >>> It seems that we would want the process to behave as follows:
>> >>> 1) Mgmt-layer at dest queries dest host max supported nested_state size.
>> >>> (Which should be returned from
>> >>> kvm_check_extension(KVM_CAP_NESTED_STATE))
>> >>> 2) Mgmt-layer at source initiate migration to dest with requesting QEMU
>> >>> to send nested_state
>> >>> matching dest max supported nested_state size.
>> >>> When saving nested state using KVM_GET_NESTED_STATE IOCTL, QEMU will
>> >>> specify in nested_state->size
>> >>> the *requested* size to be saved and KVM should be able to save only
>> >>> the information which matches
>> >>> the version that worked with that size.
>> >>> 3) After some sanity checks on received migration stream, dest host use
>> >>> KVM_SET_NESTED_STATE IOCTL.
>> >>> This IOCTL should deduce which information it should deploy based on
>> >>> given nested_state->size.
>>
>> I have to object to any proposal which requires the management later
>> to communicate with the source and the destination to determine what
>> should be done.
>
> Can you elaborate on why you object ?
We don't currently have this requirement, and I don't want to be
encumbered by it.
- Re: [Qemu-devel] [QEMU PATCH v2 0/2]: KVM: i386: Add support for save and restore nested state, (continued)
- Re: [Qemu-devel] [QEMU PATCH v2 0/2]: KVM: i386: Add support for save and restore nested state, Dr. David Alan Gilbert, 2018/11/01
- Re: [Qemu-devel] [QEMU PATCH v2 0/2]: KVM: i386: Add support for save and restore nested state, Jim Mattson, 2018/11/01
- Re: [Qemu-devel] [QEMU PATCH v2 0/2]: KVM: i386: Add support for save and restore nested state, Liran Alon, 2018/11/01
- Re: [Qemu-devel] [QEMU PATCH v2 0/2]: KVM: i386: Add support for save and restore nested state, Paolo Bonzini, 2018/11/02
- Re: [Qemu-devel] [QEMU PATCH v2 0/2]: KVM: i386: Add support for save and restore nested state, Dr. David Alan Gilbert, 2018/11/02
- Re: [Qemu-devel] [QEMU PATCH v2 0/2]: KVM: i386: Add support for save and restore nested state, Daniel P . Berrangé, 2018/11/02
- Re: [Qemu-devel] [QEMU PATCH v2 0/2]: KVM: i386: Add support for save and restore nested state, Paolo Bonzini, 2018/11/04
- Re: [Qemu-devel] [QEMU PATCH v2 0/2]: KVM: i386: Add support for save and restore nested state, Liran Alon, 2018/11/02
- Re: [Qemu-devel] [QEMU PATCH v2 0/2]: KVM: i386: Add support for save and restore nested state, Jim Mattson, 2018/11/02
- Re: [Qemu-devel] [QEMU PATCH v2 0/2]: KVM: i386: Add support for save and restore nested state, Daniel P . Berrangé, 2018/11/02
- Re: [Qemu-devel] [QEMU PATCH v2 0/2]: KVM: i386: Add support for save and restore nested state,
Jim Mattson <=
- Re: [Qemu-devel] [QEMU PATCH v2 0/2]: KVM: i386: Add support for save and restore nested state, Daniel P . Berrangé, 2018/11/02
- Re: [Qemu-devel] [QEMU PATCH v2 0/2]: KVM: i386: Add support for save and restore nested state, Dr. David Alan Gilbert, 2018/11/02
- Re: [Qemu-devel] [QEMU PATCH v2 0/2]: KVM: i386: Add support for save and restore nested state, Paolo Bonzini, 2018/11/04
- Re: [Qemu-devel] [QEMU PATCH v2 0/2]: KVM: i386: Add support for save and restore nested state, Daniel P . Berrangé, 2018/11/12
- Re: [Qemu-devel] [QEMU PATCH v2 0/2]: KVM: i386: Add support for save and restore nested state, Dr. David Alan Gilbert, 2018/11/12
- Re: [Qemu-devel] [QEMU PATCH v2 0/2]: KVM: i386: Add support for save and restore nested state, Paolo Bonzini, 2018/11/12
- Re: [Qemu-devel] [QEMU PATCH v2 0/2]: KVM: i386: Add support for save and restore nested state, Daniel P . Berrangé, 2018/11/12
- Re: [Qemu-devel] [QEMU PATCH v2 0/2]: KVM: i386: Add support for save and restore nested state, Liran Alon, 2018/11/12
- Re: [Qemu-devel] [QEMU PATCH v2 0/2]: KVM: i386: Add support for save and restore nested state, Jim Mattson, 2018/11/12
- Re: [Qemu-devel] [QEMU PATCH v2 0/2]: KVM: i386: Add support for save and restore nested state, Liran Alon, 2018/11/12