From: Paolo Bonzini <pbonzini@redhat.com>
To: Sean Christopherson <seanjc@google.com>,
"Maciej S. Szmigiero" <mail@maciej.szmigiero.name>
Cc: Vitaly Kuznetsov <vkuznets@redhat.com>,
Wanpeng Li <wanpengli@tencent.com>,
Jim Mattson <jmattson@google.com>,
Igor Mammedov <imammedo@redhat.com>,
Marc Zyngier <maz@kernel.org>, James Morse <james.morse@arm.com>,
Julien Thierry <julien.thierry.kdev@gmail.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Huacai Chen <chenhuacai@kernel.org>,
Aleksandar Markovic <aleksandar.qemu.devel@gmail.com>,
Paul Mackerras <paulus@ozlabs.org>,
Christian Borntraeger <borntraeger@de.ibm.com>,
Janosch Frank <frankja@linux.ibm.com>,
David Hildenbrand <david@redhat.com>,
Cornelia Huck <cohuck@redhat.com>,
Claudio Imbrenda <imbrenda@linux.ibm.com>,
Joerg Roedel <joro@8bytes.org>,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 2/8] KVM: Integrate gfn_to_memslot_approx() into search_memslots()
Date: Thu, 10 Jun 2021 18:17:33 +0200 [thread overview]
Message-ID: <eb9d336a-67dd-6a31-51c2-cbcd72c49824@redhat.com> (raw)
In-Reply-To: <YKWB9bPyyFfo0uhf@google.com>
On 19/05/21 23:24, Sean Christopherson wrote:
> An alternative to modifying the PPC code would be to make the existing
> search_memslots() a wrapper to __search_memslots(), with the latter taking
> @approx.
Let's just modify PPC to use __gfn_to_memslot instead of search_memslots().
__gfn_to_memslot() has never introduced any functionality over
search_memslots(), ever since search_memslots() was introduced in 2011.
Paolo
> We might also want to make this __always_inline to improve the likelihood of the
> compiler optimizing away @approx. I doubt it matters in practice...
>
next prev parent reply other threads:[~2021-06-10 16:17 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-16 21:44 [PATCH v3 0/8] KVM: Scalable memslots implementation Maciej S. Szmigiero
2021-05-16 21:44 ` [PATCH v3 1/8] KVM: x86: Cache total page count to avoid traversing the memslot array Maciej S. Szmigiero
2021-05-19 21:00 ` Sean Christopherson
2021-05-21 7:03 ` Maciej S. Szmigiero
2021-05-16 21:44 ` [PATCH v3 2/8] KVM: Integrate gfn_to_memslot_approx() into search_memslots() Maciej S. Szmigiero
2021-05-19 21:24 ` Sean Christopherson
2021-05-21 7:03 ` Maciej S. Szmigiero
2021-06-10 16:17 ` Paolo Bonzini [this message]
2021-05-16 21:44 ` [PATCH v3 3/8] KVM: Resolve memslot ID via a hash table instead of via a static array Maciej S. Szmigiero
2021-05-19 22:31 ` Sean Christopherson
2021-05-21 7:05 ` Maciej S. Szmigiero
2021-05-22 11:11 ` Maciej S. Szmigiero
2021-05-16 21:44 ` [PATCH v3 4/8] KVM: Introduce memslots hva tree Maciej S. Szmigiero
2021-05-19 23:07 ` Sean Christopherson
2021-05-21 7:06 ` Maciej S. Szmigiero
2021-05-16 21:44 ` [PATCH v3 5/8] KVM: s390: Introduce kvm_s390_get_gfn_end() Maciej S. Szmigiero
2021-05-16 21:44 ` [PATCH v3 6/8] KVM: Keep memslots in tree-based structures instead of array-based ones Maciej S. Szmigiero
2021-05-19 23:10 ` Sean Christopherson
2021-05-21 7:06 ` Maciej S. Szmigiero
2021-05-25 23:21 ` Sean Christopherson
2021-06-01 20:24 ` Maciej S. Szmigiero
2021-05-16 21:44 ` [PATCH v3 7/8] KVM: Optimize gfn lookup in kvm_zap_gfn_range() Maciej S. Szmigiero
2021-05-26 17:33 ` Sean Christopherson
2021-06-01 20:25 ` Maciej S. Szmigiero
2021-05-16 21:44 ` [PATCH v3 8/8] KVM: Optimize overlapping memslots check Maciej S. Szmigiero
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