linux-kernel - Re: [PATCH v5 2/4] KVM: X86: Add paravirt remote TLB flush

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Message-ID: <d7ef9549-9339-251f-b0d1-de1a4c83cea0@redhat.com>
Date:   Thu, 16 Nov 2017 12:00:45 +0100
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        Wanpeng Li <kernellwp@...il.com>
Cc:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        Radim Krčmář <rkrcmar@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Wanpeng Li <wanpeng.li@...mail.com>
Subject: Re: [PATCH v5 2/4] KVM: X86: Add paravirt remote TLB flush

On 15/11/2017 22:11, Konrad Rzeszutek Wilk wrote:
> If we migrate to another host that does not expose this, should the
> flush_tlb_others be reset back to the generic one? Or we don't care that
> much ?

Migration to a host that does not expose the feature would be a
configuration error.

Paolo