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Re: [PATCH 0/4] Implements the NetBSD Virtual Machine Monitor accelerato

From: Kamil Rytarowski
Subject: Re: [PATCH 0/4] Implements the NetBSD Virtual Machine Monitor accelerator
Date: Tue, 28 Jan 2020 13:12:56 +0100
User-agent: Mozilla/5.0 (X11; NetBSD amd64; rv:68.0) Gecko/20100101 Thunderbird/68.4.1

On 28.01.2020 13:08, Sergio Lopez wrote:
> On Tue, Jan 28, 2020 at 12:11:51PM +0100, Kamil Rytarowski wrote:
>> On 28.01.2020 10:10, Sergio Lopez wrote:
>>> On Tue, Jan 07, 2020 at 01:53:57PM +0100, Kamil Rytarowski wrote:
>>>> Hello QEMU Community!
>>>> Over the past year the NetBSD team has been working hard on a new 
>>>> user-mode API
>>>> for our hypervisor that will be released as part of the upcoming NetBSD 
>>>> 9.0.
>>>> This new API adds user-mode capabilities to create and manage virtual 
>>>> machines,
>>>> configure memory mappings for guest machines, and create and control 
>>>> execution
>>>> of virtual processors.
>>>> With this new API we are now able to bring our hypervisor to the QEMU
>>>> community! The following patches implement the NetBSD Virtual Machine 
>>>> Monitor
>>>> accelerator (NVMM) for QEMU on NetBSD 9.0 and newer hosts.
>>>> When compiling QEMU for x86_64 passing the --enable-nvmm flag will compile 
>>>> the
>>>> accelerator for use. At runtime using the '-accel nvmm' should see a
>>>> significant performance improvement over emulation, much like when using 
>>>> 'hax'
>>>> on NetBSD.
>>>> The documentation for this new API is visible at https://man.netbsd.org 
>>>> under
>>>> the libnvmm(3) and nvmm(4) pages.
>>>> NVMM was designed and implemented by Maxime Villard.
>>>> Thank you for your feedback.
>>> Thank you for working on this, it's nice to see that QEMU will gain
>>> HW-assisted acceleration on NetBSD 9.0. A couple things:
>> Thank you for the review!
>>>  - Are you and/or Maxime willing to step up as maintainers for the
>>>    NVMM support in QEMU?
>> NVMM (as of today) is part of the NetBSD support and I am the maintainer
>> for the NetBSD code (noted in MAINTAINERS).
>> In case of non-trivial changes I will reach Maxime for his feedback.
> OK, sounds good to me.
>>>  - In the next version of the patch series, please use
>>>    "scripts/get_maintainer.pl" to get the list of people you need to
>>>    CC for the patch series.
>> I've submitted a fixup patch '[PATCH v2 2/4] Add the NetBSD Virtual
>> Machine Monitor accelerator.' instead of the full series.
>> I have rechecked the maintainers with the patch and I don't see anybody
>> else as a candidate for review.
> $ ./scripts/get_maintainer.pl /tmp/0004.patch 
> Paolo Bonzini <address@hidden> (maintainer:Main loop)
> Richard Henderson <address@hidden> (maintainer:Overall TCG CPUs)
> Eduardo Habkost <address@hidden> (maintainer:X86 TCG CPUs)
> address@hidden (open list:All patches CC here)
> $ ./scripts/get_maintainer.pl /tmp/0002.patch 
> get_maintainer.pl: No maintainers found, printing recent contributors.
> get_maintainer.pl: Do not blindly cc: them on patches!  Use common sense.
> "Philippe Mathieu-Daudé" <address@hidden> (commit_signer:31/112=28%)
> Paolo Bonzini <address@hidden> (commit_signer:31/112=28%)
> Thomas Huth <address@hidden> 
> (commit_signer:25/112=22%,commit_signer:14/53=26%)
> "Daniel P. Berrangé" <address@hidden> (commit_signer:24/112=21%)
> Laurent Vivier <address@hidden> 
> (commit_signer:22/112=20%,commit_signer:10/53=19%)
> Gerd Hoffmann <address@hidden> (commit_signer:13/53=25%)
> "Michael S. Tsirkin" <address@hidden> (commit_signer:9/53=17%)
> Markus Armbruster <address@hidden> (commit_signer:9/53=17%)
> address@hidden (open list:All patches CC here)
> I think you should resping the whole series as v2, adding Richard,
> Eduardo and Philippe to the CC list. That should help with the review
> process.

OK. I will do it.

Please have a look at v2 2/4, submit reviewed-by and I will submit the
whole series again.

> Thanks,
> Sergio.
>> I don't maintain a merge queue on my own. Please put the reviewed
>> patches on a merge queue yourself.
>> Thank you in advance,
>>> Thanks,
>>> Sergio.

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