From: Cornelia Huck <cohuck@redhat.com>
To: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
Cc: Marc Zyngier <maz@kernel.org>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
kvmarm@lists.cs.columbia.edu, linux-mips@vger.kernel.org,
kvm-ppc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org,
pbonzini@redhat.com, tsbogend@alpha.franken.de,
paulus@ozlabs.org, mpe@ellerman.id.au, benh@kernel.crashing.org,
borntraeger@de.ibm.com, frankja@linux.ibm.com, david@redhat.com,
heiko.carstens@de.ibm.com, gor@linux.ibm.com,
sean.j.christopherson@intel.com, wanpengli@tencent.com,
jmattson@google.com, joro@8bytes.org, tglx@linutronix.de,
mingo@redhat.com, bp@alien8.de, x86@kernel.org, hpa@zytor.com,
james.morse@arm.com, julien.thierry.kdev@gmail.com,
suzuki.poulose@arm.com, christoffer.dall@arm.com,
peterx@redhat.com, thuth@redhat.com
Subject: Re: [PATCH v2] KVM: Optimize kvm_arch_vcpu_ioctl_run function
Date: Thu, 16 Apr 2020 10:50:19 +0200 [thread overview]
Message-ID: <20200416105019.51191d79.cohuck@redhat.com> (raw)
In-Reply-To: <8b92fb5b-5138-0695-fb90-6c36b8dfad00@linux.alibaba.com>
On Thu, 16 Apr 2020 16:45:33 +0800
Tianjia Zhang <tianjia.zhang@linux.alibaba.com> wrote:
> On 2020/4/16 16:28, Marc Zyngier wrote:
> > On 2020-04-16 08:03, Vitaly Kuznetsov wrote:
> >> Tianjia Zhang <tianjia.zhang@linux.alibaba.com> writes:
> >>
> >>> In earlier versions of kvm, 'kvm_run' is an independent structure
> >>> and is not included in the vcpu structure. At present, 'kvm_run'
> >>> is already included in the vcpu structure, so the parameter
> >>> 'kvm_run' is redundant.
> >>>
> >>> This patch simplify the function definition, removes the extra
> >>> 'kvm_run' parameter, and extract it from the 'kvm_vcpu' structure
> >>> if necessary.
> >>>
> >>> Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
> >>> ---
> >>>
> >>> v2 change:
> >>> remove 'kvm_run' parameter and extract it from 'kvm_vcpu'
> >>>
> >>> arch/mips/kvm/mips.c | 3 ++-
> >>> arch/powerpc/kvm/powerpc.c | 3 ++-
> >>> arch/s390/kvm/kvm-s390.c | 3 ++-
> >>> arch/x86/kvm/x86.c | 11 ++++++-----
> >>> include/linux/kvm_host.h | 2 +-
> >>> virt/kvm/arm/arm.c | 6 +++---
> >>> virt/kvm/kvm_main.c | 2 +-
> >>> 7 files changed, 17 insertions(+), 13 deletions(-)
> > Overall, there is a large set of cleanups to be done when both the vcpu
> > and the run
> > structures are passed as parameters at the same time. Just grepping the
> > tree for
> > kvm_run is pretty instructive.
> >
> > M.
>
> Sorry, it's my mistake, I only compiled the x86 platform, I will submit
> patch again.
I think it's completely fine (and even preferable) to do cleanups like
that on top.
[FWIW, I compiled s390 here.]
next prev parent reply other threads:[~2020-04-16 9:01 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-16 5:10 [PATCH v2] KVM: Optimize kvm_arch_vcpu_ioctl_run function Tianjia Zhang
2020-04-16 7:03 ` Vitaly Kuznetsov
2020-04-16 8:28 ` Marc Zyngier
2020-04-16 8:45 ` Tianjia Zhang
2020-04-16 8:50 ` Cornelia Huck [this message]
2020-04-16 9:08 ` Tianjia Zhang
2020-04-16 8:58 ` Marc Zyngier
2020-04-16 8:10 ` Cornelia Huck
2020-04-16 14:16 ` Paolo Bonzini
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