Subject: Re: [PATCH v4 09/15] Drivers: hv: Introduce hv_output_arg_exists in
hv_common.c

On 10/2/2023 12:29 PM, Alex Ionescu wrote:

quoted

Hi Nuno,

Is it possible to simply change to always allocating the output page?
For example, the output page could be needed in scenarios where Linux
is not running as the root partition, since certain hypercalls that a
guest can make will still require one (I realize that's not the case
_today_, but I don't believe this optimization buys much).

I agree - it would indeed simplify the code, and guests will probably make use of it
sooner or later.

Happy to make that change if Hyper-V guest maintainers agree.
Long, Dexuan, Michael, what do you think?

There is no use case as of today for guest VMs. And it allocates extra memory that are never used when running as guest VMs.

I suggest keep this code unchanged as is.

Thanks,
Long
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