linux-kernel - Re: [PATCH v2 1/2] KVM: x86: Use vector-hashing to deliver lowest-priority interrupts

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Date:	Tue, 19 Jan 2016 14:42:31 +0100
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	"Wu, Feng" <feng.wu@...el.com>,
	Radim Krcmár <rkrcmar@...hat.com>
Cc:	"kvm@...r.kernel.org" <kvm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 1/2] KVM: x86: Use vector-hashing to deliver
 lowest-priority interrupts



On 19/01/2016 05:44, Wu, Feng wrote:
> > I think Radim's suggestion is fine.  You can print an error (just once
> > per guest) to dmesg if the result of the hashing computation corresponds
> > to a disabled APIC.
> 
> Good idea, is there already a convenient way to do this in KVM?

No, you can just use something like the definition of printk_once (in
include/linux/printk.h), but with a flag in struct kvm_arch.

Paolo