linux-kernel - Re: [PATCH v4 0/6] KVM: x86/vPMU: Efficiency optimization by reusing last created perf

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Message-ID: <dcbc78f5-c267-d5be-f4e8-deaebf91fe1f@linux.intel.com>
Date:   Tue, 12 Nov 2019 14:08:36 +0800
From:   Like Xu <like.xu@...ux.intel.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Subject: Re: [PATCH v4 0/6] KVM: x86/vPMU: Efficiency optimization by reusing
 last created perf_event

Hi Paolo,

On 2019/10/29 0:43, Peter Zijlstra wrote:
> On Sun, Oct 27, 2019 at 06:52:37PM +0800, Like Xu wrote:
>> For perf subsystem, please help review first two patches.
> 
>> Like Xu (6):
>>    perf/core: Provide a kernel-internal interface to recalibrate event
>>      period
>>    perf/core: Provide a kernel-internal interface to pause perf_event
> 
> Acked-by: Peter Zijlstra (Intel) <peterz@...radead.org>
> 

Would you mind to revisit the following patches for upstream ?

 >    KVM: x86/vPMU: Rename pmu_ops callbacks from msr_idx to rdpmc_ecx
 >    KVM: x86/vPMU: Introduce a new kvm_pmu_ops->msr_idx_to_pmc callback
 >    KVM: x86/vPMU: Reuse perf_event to avoid unnecessary
 >      pmc_reprogram_counter
 >    KVM: x86/vPMU: Add lazy mechanism to release perf_event per vPMC

For vPMU, please review two more patches as well:
+ 
https://lore.kernel.org/kvm/20191030164418.2957-1-like.xu@linux.intel.com/ 
(kvm)
+ 
https://lore.kernel.org/lkml/20191105140955.22504-1-like.xu@linux.intel.com/ 
(perf)

Thanks,
Like Xu