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

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Message-ID: <E959C4978C3B6342920538CF579893F00C2B2E73@SHSMSX104.ccr.corp.intel.com>
Date:	Tue, 19 Jan 2016 13:49:02 +0000
From:	"Wu, Feng" <feng.wu@...el.com>
To:	Paolo Bonzini <pbonzini@...hat.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>,
	"Wu, Feng" <feng.wu@...el.com>
Subject: RE: [PATCH v2 1/2] KVM: x86: Use vector-hashing to deliver
 lowest-priority interrupts



> -----Original Message-----
> From: linux-kernel-owner@...r.kernel.org [mailto:linux-kernel-
> owner@...r.kernel.org] On Behalf Of Paolo Bonzini
> Sent: Tuesday, January 19, 2016 9:43 PM
> To: Wu, Feng <feng.wu@...el.com>; Radim Krcmár <rkrcmar@...hat.com>
> Cc: kvm@...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.

Yes, that is a possible solution, if you don't think adding a flag in struct
kvm_arch is not too overkill, I am fine with this. :)

Thanks,
Feng