Re: [Xen-devel] [PATCH v2 COLOPre 03/13] libxc/restore: zero ioreq page only one time

[Paul Durrant <Paul.Durrant@xxxxxxxxxx>]

> -----Original Message-----
> From: Yang Hongyang [mailto:yanghy@xxxxxxxxxxxxxx]
> Sent: 11 June 2015 13:59
> To: Paul Durrant; Wen Congyang; Andrew Cooper; xen-devel@xxxxxxxxxxxxx
> Cc: Wei Liu; Ian Campbell; guijianfeng@xxxxxxxxxxxxxx;
> yunhong.jiang@xxxxxxxxx; Eddie Dong; rshriram@xxxxxxxxx; Ian Jackson
> Subject: Re: [Xen-devel] [PATCH v2 COLOPre 03/13] libxc/restore: zero ioreq
> page only one time
> 
> 
> 
> On 06/11/2015 06:20 PM, Paul Durrant wrote:
> >> -----Original Message-----
> >> From: Wen Congyang [mailto:wency@xxxxxxxxxxxxxx]
> >> Sent: 11 June 2015 09:48
> >> To: Paul Durrant; Andrew Cooper; Yang Hongyang; xen-
> devel@xxxxxxxxxxxxx
> >> Cc: Wei Liu; Ian Campbell; guijianfeng@xxxxxxxxxxxxxx;
> [...]
> >
> >>
> >> In our implementation, we don't start a new emulator. The codes can
> work,
> >> but some bugs may be not triggered.
> >>
> >
> > How do you reconcile the incoming QEMU save record with the running
> emulator state?
> 
> We introduce a qmp command "xen-load-devices-
> state"(libxl__qmp_restore) which
> can restore the emulator state. The step of resotre emulator state at a
> checkpoint is:
> 
> 1. libxl__qmp_stop    -> vm_stop() in qemu
> 2. libxl__qmp_restore -> load_vmstate() in qemu
> 3. libxl__qmp_resume  -> vm_start() in qemu
> 

Ok, that sounds like the ideal time to hook back into Xen by creating a new 
ioreq server.

  Paul

> >
> >    Paul
> >
> >> Thanks
> >> Wen Congyang
> >>
> >>>
> >>>    Paul
> >>>
> >>>>
> >>>> Thanks
> >>>> Wen Congyang
> >>>>
> >>>>>
> >>>>>    Paul
> >>>>>
> >>>>>> We will set to the guest to a new state, the old state should be
> >> dropped.
> >>>>>>
> >>>>>> Thanks
> >>>>>> Wen Congyang
> >>>>>>
> >>>>>>>
> >>>>>>>    Paul
> >>>>>>>
> >>>>>>>>
> >>>>>>>> Thanks
> >>>>>>>> Wen Congyang
> >>>>>>>>
> >>>>>>>>>
> >>>>>>>>>    Paul
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>>> Thanks
> >>>>>>>>>> Wen Congyang
> >>>>>>>>>>
> >>>>>>>>>>>
> >>>>>>>>>>> ~Andrew
> >>>>>>>>>>> .
> >>>>>>>>>>>
> >>>>>>>>>
> >>>>>>>>> .
> >>>>>>>>>
> >>>>>>>
> >>>>>>> .
> >>>>>>>
> >>>>>>
> >>>>>>
> >>>>>> _______________________________________________
> >>>>>> Xen-devel mailing list
> >>>>>> Xen-devel@xxxxxxxxxxxxx
> >>>>>> http://lists.xen.org/xen-devel
> >>>>>
> >>>>> _______________________________________________
> >>>>> Xen-devel mailing list
> >>>>> Xen-devel@xxxxxxxxxxxxx
> >>>>> http://lists.xen.org/xen-devel
> >>>>> .
> >>>>>
> >>>
> >>> .
> >>>
> >
> >
> > _______________________________________________
> > Xen-devel mailing list
> > Xen-devel@xxxxxxxxxxxxx
> > http://lists.xen.org/xen-devel
> > .
> >
> 
> --
> Thanks,
> Yang.

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