linux-kernel - Re: [PATCH v2 13/15] uapi: hyperv: Add mshv driver headers hvhdk.h, hvhdk_mini.h, hvgdk.h, hvgdk

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Message-ID: <f94e3405-20c5-4701-8217-9542affef46f@linux.microsoft.com>
Date:   Wed, 11 Oct 2023 18:56:04 -0700
From:   Nuno Das Neves <nunodasneves@...ux.microsoft.com>
To:     Greg KH <gregkh@...uxfoundation.org>
Cc:     Wei Liu <wei.liu@...nel.org>, linux-hyperv@...r.kernel.org,
        linux-kernel@...r.kernel.org, x86@...nel.org,
        linux-arm-kernel@...ts.infradead.org, linux-arch@...r.kernel.org,
        patches@...ts.linux.dev, mikelley@...rosoft.com, kys@...rosoft.com,
        haiyangz@...rosoft.com, decui@...rosoft.com,
        apais@...ux.microsoft.com, Tianyu.Lan@...rosoft.com,
        ssengar@...ux.microsoft.com, mukeshrathor@...rosoft.com,
        stanislav.kinsburskiy@...il.com, jinankjain@...ux.microsoft.com,
        vkuznets@...hat.com, tglx@...utronix.de, mingo@...hat.com,
        bp@...en8.de, dave.hansen@...ux.intel.com, hpa@...or.com,
        will@...nel.org, catalin.marinas@....com
Subject: Re: [PATCH v2 13/15] uapi: hyperv: Add mshv driver headers hvhdk.h,
 hvhdk_mini.h, hvgdk.h, hvgdk_mini.h

On 10/10/2023 11:42 PM, Greg KH wrote:
> On Tue, Oct 10, 2023 at 03:49:48PM -0700, Nuno Das Neves wrote:
>> On 8/25/2023 11:24 AM, Nuno Das Neves wrote:
>>> On 8/19/2023 3:26 AM, Greg KH wrote:
>>>>
>>>> My "strong" opinion is the one kernel development rule that we have,
>>>> "you can not break userspace".  So, if you change these
>>>> values/structures/whatever in the future, and userspace tools break,
>>>> that's not ok and the changes have to be reverted.
>>>>
>>>> If you can control both sides of the API here (with open tools that you
>>>> can guarantee everyone will always update to), then yes, you can change
>>>> the api in the future.
>>>>

We control both sides of the API. The code is open. No one else can use it
today, therefore we can guarantee all the users will stay updated.

> Just submit your fixed up patch series based on the previous review
> comments and it will be reviewed again, just like all kernel patches
> are.

I will do that.

> Perhaps you all should take the time to do some kernel patch reviews of
> other stuff sent to the mailing lists to get an idea of how this whole
> process works, and to get better integrated into the kernel development
> community,

That is a good suggestion, I will do that.

> before dumping a huge patchset on us with lots of process
> questions like this?  Why are you asking the community to do a lot of
> work and hand-holding when you aren't helping others out as well?

I take your point, sorry my questions came off that way. I will work to
improve on that :)

Thanks,
Nuno