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Thu, 24 Jun 2021 10:06:41 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1lwMFi-00DvY7-Jz for linux-arm-kernel@lists.infradead.org; Thu, 24 Jun 2021 10:06:31 +0000 Received: from disco-boy.misterjones.org (disco-boy.misterjones.org [51.254.78.96]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 2AC33613FB; Thu, 24 Jun 2021 10:06:30 +0000 (UTC) Received: from sofa.misterjones.org ([185.219.108.64] helo=why.misterjones.org) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1lwMFg-009ZEr-4I; Thu, 24 Jun 2021 11:06:28 +0100 Date: Thu, 24 Jun 2021 11:06:27 +0100 Message-ID: <87mtrfinks.wl-maz@kernel.org> From: Marc Zyngier To: Nicholas Piggin Cc: Aleksandar Markovic , Huacai Chen , Paul Mackerras , Paolo Bonzini , David Stevens , Zhenyu Wang , Zhi Wang , Alexandru Elisei , dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, intel-gvt-dev@lists.freedesktop.org, James Morse , Jim Mattson , Joerg Roedel , kvmarm@lists.cs.columbia.edu, kvm-ppc@vger.kernel.org, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, Sean Christopherson , Suzuki K Poulose , Vitaly Kuznetsov , Wanpeng Li , Will Deacon Subject: Re: [PATCH 3/6] KVM: x86/mmu: avoid struct page in MMU In-Reply-To: <1624524744.2sr7o7ix86.astroid@bobo.none> References: <20210624035749.4054934-1-stevensd@google.com> <20210624035749.4054934-4-stevensd@google.com> <1624524744.2sr7o7ix86.astroid@bobo.none> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM-LB/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL-LB/10.8 EasyPG/1.0.0 Emacs/27.1 (x86_64-pc-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: npiggin@gmail.com, aleksandar.qemu.devel@gmail.com, chenhuacai@kernel.org, paulus@ozlabs.org, pbonzini@redhat.com, stevensd@chromium.org, zhenyuw@linux.intel.com, zhi.a.wang@intel.com, alexandru.elisei@arm.com, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, intel-gvt-dev@lists.freedesktop.org, james.morse@arm.com, jmattson@google.com, joro@8bytes.org, kvmarm@lists.cs.columbia.edu, kvm-ppc@vger.kernel.org, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, seanjc@google.com, suzuki.poulose@arm.com, vkuznets@redhat.com, wanpengli@tencent.com, will@kernel.org X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210624_030630_739072_22067152 X-CRM114-Status: GOOD ( 16.99 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, 24 Jun 2021 09:58:00 +0100, Nicholas Piggin wrote: > > Excerpts from David Stevens's message of June 24, 2021 1:57 pm: > > From: David Stevens > > out_unlock: > > if (is_tdp_mmu_root(vcpu->kvm, vcpu->arch.mmu->root_hpa)) > > read_unlock(&vcpu->kvm->mmu_lock); > > else > > write_unlock(&vcpu->kvm->mmu_lock); > > - kvm_release_pfn_clean(pfn); > > + if (pfnpg.page) > > + put_page(pfnpg.page); > > return r; > > } > > How about > > kvm_release_pfn_page_clean(pfnpg); I'm not sure. I always found kvm_release_pfn_clean() ugly, because it doesn't mark the page 'clean'. I find put_page() more correct. Something like 'kvm_put_pfn_page()' would make more sense, but I'm so bad at naming things that I could just as well call it 'bob()'. M. -- Without deviation from the norm, progress is not possible. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel