linux-kernel - Re: [PATCH 1/3] KVM: x86: merge kvm_arch_set_irq with kvm_set_msi

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Date:	Mon, 2 Nov 2015 18:05:20 +0100
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	Radim Krcmar <rkrcmar@...hat.com>
Cc:	linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
	Alex Williamson <alex.williamson@...hat.com>
Subject: Re: [PATCH 1/3] KVM: x86: merge kvm_arch_set_irq with
 kvm_set_msi_inatomic



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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