Subject: Re: [PATCH 1/3] KVM: x86: merge kvm_arch_set_irq with
 kvm_set_msi_inatomic
To: Radim Krcmar <rkrcmar@redhat.com>
References: <1446466878-32837-1-git-send-email-pbonzini@redhat.com>
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 <20151102145923.GB24667@potion.brq.redhat.com> <56378A62.3090706@redhat.com>
 <20151102170156.GA28717@potion.brq.redhat.com>
Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
        Alex Williamson <alex.williamson@redhat.com>
From: Paolo Bonzini <pbonzini@redhat.com>
Message-ID: <563797D0.7050109@redhat.com>
Date: Mon, 2 Nov 2015 18:05:20 +0100
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On 02/11/2015 18:01, Radim Krcmar wrote:
>> > Yes.  Both because the Virtuozzo people confirmed that kvm_arch_set_irq
>> > isn't needed for synic, and because synic is currently broken with APICv.
> Thanks.
> 
> (We can add direct delivery for |online vcpus| < X if performance with
>  low number of VCPUs happens to regress because of the schedule_work,)

Yeah, we will change the VFIO interrupt handler to non-threaded, which
will do more or less the same (what you lose now through schedule_work,
you will recoup by doing things directly in the ISR).

Paolo
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