linux-kernel - Re: [PATCH] kvm: rename HINTS_DEDICATED to KVM_HINTS

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Date:   Fri, 18 May 2018 19:18:57 +0200
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Eduardo Habkost <ehabkost@...hat.com>,
        "Michael S. Tsirkin" <mst@...hat.com>
Cc:     linux-kernel@...r.kernel.org,
        Radim Krčmář <rkrcmar@...hat.com>,
        Jonathan Corbet <corbet@....net>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
        kvm@...r.kernel.org, linux-doc@...r.kernel.org,
        qemu-devel@...gnu.org
Subject: Re: [PATCH] kvm: rename HINTS_DEDICATED to KVM_HINTS_REALTIME

On 18/05/2018 19:13, Eduardo Habkost wrote:
>> As much as we'd like to be helpful and validate input, you need a real
>> time host too. I'm not sure how we'd find out - I suggest we do not
>> bother for now.
> I'm worried that people will start enabling the flag in all kinds
> of scenarios where the guarantees can't be kept, and make the
> meaning of the flag in practice completely different from its
> documented meaning.

I don't think we should try to detect anything.  As far as QEMU is
concerned, it's mostly garbage in, garbage out when it comes to invalid
configurations.  It's just a bit, and using it in invalid configurations
is okay if you're doing it (for example) for debugging.

Paolo