linux-kernel - RE: [PATCH v4 2/4] KVM: x86: Use vector-hashing to deliver lowest-priority interrupts

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Date:	Thu, 28 Jan 2016 01:51:35 +0000
From:	"Wu, Feng" <feng.wu@...el.com>
To:	Radim Krcmár <rkrcmar@...hat.com>,
	"pbonzini@...hat.com" <pbonzini@...hat.com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"kvm@...r.kernel.org" <kvm@...r.kernel.org>,
	"Wu, Feng" <feng.wu@...el.com>
Subject: RE: [PATCH v4 2/4] KVM: x86: Use vector-hashing to deliver
 lowest-priority interrupts



> -----Original Message-----
> From: Radim Krčmář [mailto:rkrcmar@...hat.com]
> Sent: Wednesday, January 27, 2016 2:59 AM
> To: Wu, Feng <feng.wu@...el.com>
> Cc: pbonzini@...hat.com; linux-kernel@...r.kernel.org; kvm@...r.kernel.org
> Subject: Re: [PATCH v4 2/4] KVM: x86: Use vector-hashing to deliver lowest-
> priority interrupts
> 
> 2016-01-25 16:53+0800, Feng Wu:
> > Use vector-hashing to deliver lowest-priority interrupts, As an
> > example, modern Intel CPUs in server platform use this method to
> > handle lowest-priority interrupts.
> >
> > Signed-off-by: Feng Wu <feng.wu@...el.com>
> > ---
> 
> With any proposed resolution of BUG_ON in kvm_vector_to_index,
> 
> Reviewed-by: Radim Krčmář <rkrcmar@...hat.com>
> 
> > diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
> > @@ -123,6 +123,9 @@ module_param(tsc_tolerance_ppm, uint, S_IRUGO |
> S_IWUSR);
> > +bool __read_mostly vector_hashing = true;
> 
> (Module param can be static.)
> 
> > +module_param(vector_hashing, bool, S_IRUGO);

Thanks a lot for your comments, Radim & Paolo! 

Paolo, given that the only two comments above, do I need to send v5? Or
you can handle it while merging them? I am fine with both methods.

Thanks,
Feng