Re: [kvmarm] Fwd: [PATCH v9 12/16] ARM: KVM: World-switch implementation

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On Fri, Jul 27, 2012 at 10:32 AM, Marc Zyngier <marc.zyngier@xxxxxxx> wrote:
> On 26/07/12 19:50, Christoffer Dall wrote:
>> On Thu, Jul 26, 2012 at 5:30 PM, Marc Zyngier <marc.zyngier@xxxxxxx> wrote:
>>> On 25/07/12 15:17, Christoffer Dall wrote:
>>>> list rename, shot myself in the foot.
>>>>
>>>>
>>>>>> +             }
>>>>>> +
>>>>>> +             /**************************************************************
>>>>>> +              * Enter the guest
>>>>>> +              */
>>>>>> +             trace_kvm_entry(vcpu->arch.regs.pc);
>>>>>> +             kvm_guest_enter();
>>>>>> +             vcpu->mode = IN_GUEST_MODE;
>>>>>> +
>>>>>> +             ret = __kvm_vcpu_run(vcpu);
>>>>>> +
>>>>>> +             vcpu->mode = OUTSIDE_GUEST_MODE;
>>>>>> +             vcpu->stat.exits++;
>>>>>
>>>>> The tracepoint above should be sufficient for statistics.
>>>>>
>>>>
>>>> Marc added this one, so I assume there's a valid need for the separate
>>>> counter. Marc?
>>>
>>> Probably because I've been too lazy to setup a trace infrastructure on
>>> my test boxes. Stats are easier to access, but seeing now that they've
>>> been deprecated and scheduled for removal, we probably shouldn't bother
>>> with them.
>>>
>> you want to take them all out then?
>
> Looks like all stats will be dropped from KVM by 2013, if I trust
> Documentation/feature-removal-schedule.txt:
>
> What:   KVM debugfs statistics
> When:   2013
> Why:    KVM tracepoints provide mostly equivalent information in a much more
>         flexible fashion.
>
ok, they will go then.
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