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([2001:b07:6468:f312:c8dd:75d4:99ab:290a]) by smtp.gmail.com with ESMTPSA id s5sm4131010edi.93.2021.06.17.04.27.24 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 17 Jun 2021 04:27:25 -0700 (PDT) Subject: Re: [PATCH v10 2/5] KVM: stats: Add fd-based API to read binary stats data To: Greg KH , Jing Zhang Cc: KVM , KVMARM , LinuxMIPS , KVMPPC , LinuxS390 , Linuxkselftest , Marc Zyngier , James Morse , Julien Thierry , Suzuki K Poulose , Will Deacon , Huacai Chen , Aleksandar Markovic , Thomas Bogendoerfer , Paul Mackerras , Christian Borntraeger , Janosch Frank , David Hildenbrand , Cornelia Huck , Claudio Imbrenda , Sean Christopherson , Vitaly Kuznetsov , Jim Mattson , Peter Shier , Oliver Upton , David Rientjes , Emanuele Giuseppe Esposito , David Matlack , Ricardo Koller , Krish Sadhukhan , Fuad Tabba References: <20210617044146.2667540-1-jingzhangos@google.com> <20210617044146.2667540-3-jingzhangos@google.com> From: Paolo Bonzini Message-ID: Date: Thu, 17 Jun 2021 13:27:23 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.10.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org On 17/06/21 09:24, Greg KH wrote: >> Provides a file descriptor per VM to read VM stats info/data. >> Provides a file descriptor per vCPU to read vCPU stats info/data. > Shouldn't this be two separate patches, one for each thing as these are > two different features being added? They share a lot of code. We could have three patches though: - add common code for binary statistics file descriptor - add VM ioctl to retrieve a statistics file descriptor [including the definition of VM stats descriptors] - add VCPU ioctl to retrieve a statistics file descriptor [again including the definitions of VCPU stats]. Paolo