Re: move hyperv CHANNELMSG_UNLOAD from crashed kernel to kdump kernel

[Olaf Hering]

On Thu, Dec 15, Olaf Hering wrote:

> On Thu, Dec 15, Vitaly Kuznetsov wrote:
> 
> > I see a number of minor but at least one major issue against such move:
> > At least for some Hyper-V versions (2012R2 for example)
> > CHANNELMSG_UNLOAD_RESPONSE is delivered to the CPU which initially sent 
> > CHANNELMSG_REQUESTOFFERS and on kdump we may not have this CPU up as
> > we usually do kdump with nr_cpus=1 (and on the CPU which crashed). 
> 
> Since the kdump or kexec kernel will send the unload during boot I would
> expect the response to arrive where it was sent, independent from the
> number of cpus.

Wait, I just noticed that "REQUESTOFFERS" now. That might be a reason
why my suggestion will not work.

Olaf

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