- Subject: Re: [PATCH RFC V6 1/5] kvm hypervisor : Add a hypercall to KVM hypervisor to support pv-ticketlocks
- From: Avi Kivity <avi@xxxxxxxxxx>
- Date: Sun, 29 Apr 2012 16:26:21 +0300
- Cc: Raghavendra K T <raghavendra.kt@xxxxxxxxxxxxxxxxxx>, Jeremy Fitzhardinge <jeremy@xxxxxxxx>, Greg Kroah-Hartman <gregkh@xxxxxxx>, Alexander Graf <agraf@xxxxxxx>, Randy Dunlap <rdunlap@xxxxxxxxxxxx>, linux-doc@xxxxxxxxxxxxxxx, "H. Peter Anvin" <hpa@xxxxxxxxx>, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>, KVM <kvm@xxxxxxxxxxxxxxx>, Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>, Virtualization <virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx>, X86 <x86@xxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Marcelo Tosatti <mtosatti@xxxxxxxxxx>, LKML <linux-kernel@xxxxxxxxxxxxxxx>, Xen <xen-devel@xxxxxxxxxxxxxxxxxxx>, Sasha Levin <levinsasha928@xxxxxxxxx>, Srivatsa Vaddagiri <vatsa@xxxxxxxxxxxxxxxxxx>
- In-reply-to: <20120429132030.GB15413@redhat.com>
- References: <20120423095937.30893.14776.sendpatchset@codeblue.in.ibm.com> <20120423095947.30893.84029.sendpatchset@codeblue.in.ibm.com> <20120424095923.GS15413@redhat.com> <4F9D3F8B.9010805@redhat.com> <20120429132030.GB15413@redhat.com>
- User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:11.0) Gecko/20120329 Thunderbird/11.0.1
On 04/29/2012 04:20 PM, Gleb Natapov wrote:
> > > This is too similar to kvm_irq_delivery_to_apic(). Why not reuse it. We
> > > can use one of reserved delivery modes as PV delivery mode. We will
> > > disallow guest to trigger it through apic interface, so this will not be
> > > part of ABI and can be changed at will.
> > >
> >
> > I'm not thrilled about this. Those delivery modes will eventually
> > become unreserved. We can have a kvm_lookup_apic_id() that is shared
> > among implementations.
> >
> This is only internal implementation. If they become unreserved we will
> use something else.
>
Yeah, I'm thinking of that time. Why do something temporary and fragile?
--
error compiling committee.c: too many arguments to function
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