Re: [PATCH] i386: Don't try to set MSR_KVM_ASYNC_PF_EN if kernel-irqchip=off

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Subject: Re: [PATCH] i386: Don't try to set MSR_KVM_ASYNC_PF_EN if kernel-irqchip=off
From: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Date: Tue, 22 Sep 2020 19:26:42 +0200
Cc: qemu-devel@xxxxxxxxxx, "Dr. David Alan Gilbert" <dgilbert@xxxxxxxxxx>, 1896263@xxxxxxxxxxxxxxxxxx, kvm@xxxxxxxxxxxxxxx, Richard Henderson <rth@xxxxxxxxxxx>, Marcelo Tosatti <mtosatti@xxxxxxxxxx>, Laurent Vivier <lvivier@xxxxxxxxxx>, Stefan Hajnoczi <stefanha@xxxxxxxxxx>
In-reply-to: <20200922172229.GB57321@habkost.net>
References: <20200922151455.1763896-1-ehabkost@redhat.com> <87v9g5es9n.fsf@vitty.brq.redhat.com> <20200922161055.GY57321@habkost.net> <87pn6depau.fsf@vitty.brq.redhat.com> <20200922172229.GB57321@habkost.net>
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.11.0

On 22/09/20 19:22, Eduardo Habkost wrote:
> If it was possible, did KVM break live migration of
> kernel-irqchip=off guests that enabled APF?  This would mean my
> patch is replacing a crash with a silent migration bug.  Not nice
> either way.

Let's drop kernel-irqchip=off completely so migration is not broken. :)

I'm actually serious, I don't think we need a deprecation period even.

Paolo

Follow-Ups:
- Re: [PATCH] i386: Don't try to set MSR_KVM_ASYNC_PF_EN if kernel-irqchip=off
  - From: Eduardo Habkost

References:
- [PATCH] i386: Don't try to set MSR_KVM_ASYNC_PF_EN if kernel-irqchip=off
  - From: Eduardo Habkost
- Re: [PATCH] i386: Don't try to set MSR_KVM_ASYNC_PF_EN if kernel-irqchip=off
  - From: Vitaly Kuznetsov
- Re: [PATCH] i386: Don't try to set MSR_KVM_ASYNC_PF_EN if kernel-irqchip=off
  - From: Eduardo Habkost
- Re: [PATCH] i386: Don't try to set MSR_KVM_ASYNC_PF_EN if kernel-irqchip=off
  - From: Vitaly Kuznetsov
- Re: [PATCH] i386: Don't try to set MSR_KVM_ASYNC_PF_EN if kernel-irqchip=off
  - From: Eduardo Habkost

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