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([2001:b07:6468:f312:3473:41cf:8b30:f2e1]) by smtp.googlemail.com with ESMTPSA id l20sm111840324wrb.93.2019.01.07.08.39.35 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 07 Jan 2019 08:39:37 -0800 (PST) Subject: Re: [PATCH 4/11] KVM/MMU: Introduce tlb flush with range list To: lantianyu1986@gmail.com Cc: kvm@vger.kernel.org, catalin.marinas@arm.com, will.deacon@arm.com, paulus@ozlabs.org, hpa@zytor.com, kys@microsoft.com, kvmarm@lists.cs.columbia.edu, mpe@ellerman.id.au, x86@kernel.org, linux@armlinux.org.uk, michael.h.kelley@microsoft.com, mingo@redhat.com, benh@kernel.crashing.org, jhogan@kernel.org, linux-mips@vger.kernel.org, Lan Tianyu , marc.zyngier@arm.com, kvm-ppc@vger.kernel.org, bp@alien8.de, tglx@linutronix.de, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, ralf@linux-mips.org, paul.burton@mips.com, vkuznets@redhat.com, linuxppc-dev@lists.ozlabs.org References: <20190104085405.40356-1-Tianyu.Lan@microsoft.com> <20190104085405.40356-5-Tianyu.Lan@microsoft.com> From: Paolo Bonzini Openpgp: preference=signencrypt Autocrypt: addr=pbonzini@redhat.com; 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Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.3.1 MIME-Version: 1.0 In-Reply-To: <20190104085405.40356-5-Tianyu.Lan@microsoft.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-mips-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org On 04/01/19 09:53, lantianyu1986@gmail.com wrote: > struct kvm_mmu_page { > struct list_head link; > + > + /* > + * Tlb flush with range list uses struct kvm_mmu_page as list entry > + * and all list operations should be under protection of mmu_lock. > + */ > + struct list_head flush_link; > struct hlist_node hash_link; > bool unsync; > > @@ -443,6 +449,7 @@ struct kvm_mmu { Again, it would be nice not to grow the struct too much, though I understand that it's already relatively big (168 bytes). Can you at least make this an hlist, so that it only takes a single word? Paolo