Re: [Xen-devel] [PATCH v13 12/26] secondary vm suspend/resume/checkpoint code

[Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>]

Changlong Xie writes ("[PATCH v13 12/26] secondary vm suspend/resume/checkpoint 
code"):
> From: Wen Congyang <wency@xxxxxxxxxxxxxx>
> 
> Secondary vm is running in colo mode. So we will do
> the following things again and again:
> 1. Resume secondary vm
>    a. Send CHECKPOINT_SVM_READY to master.
>    b. If it is not the first resume, call 
> libxl__checkpoint_devices_preresume().
>    c. If it is the first resume(resume right after live migration),
>       - call libxl__xc_domain_restore_done() to build the secondary vm.
>       - enable secondary vm's logdirty.
>       - call libxl__domain_resume() to resume secondary vm.
>       - call libxl__checkpoint_devices_setup() to setup checkpoint devices.
>    d. Send CHECKPOINT_SVM_RESUMED to master.
> 2. Wait a new checkpoint
>    a. Call libxl__checkpoint_devices_commit().
>    b. Read CHECKPOINT_NEW from master.
> 3. Suspend secondary vm
>    a. Suspend secondary vm.
>    b. Call libxl__checkpoint_devices_postsuspend().
>    c. Send CHECKPOINT_SVM_SUSPENDED to master.
> 4. Checkpoint
>    a. Read emulator xenstore data and emulator context
>    b. REC_TYPE_CHECKPOINT_END
> 
> Signed-off-by: Wen Congyang <wency@xxxxxxxxxxxxxx>
> Signed-off-by: Yang Hongyang <hongyang.yang@xxxxxxxxxxxx>
> Signed-off-by: Changlong Xie <xiecl.fnst@xxxxxxxxxxxxxx>

Acked-by: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>

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