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[35.233.69.230]) by smtp.gmail.com with ESMTPSA id g14sm9650047wru.45.2021.02.04.10.24.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 04 Feb 2021 10:24:27 -0800 (PST) Date: Thu, 4 Feb 2021 18:24:24 +0000 From: Quentin Perret To: Will Deacon Subject: Re: [RFC PATCH v2 12/26] KVM: arm64: Introduce a Hyp buddy page allocator Message-ID: References: <20210108121524.656872-1-qperret@google.com> <20210108121524.656872-13-qperret@google.com> <20210202181307.GA17311@willie-the-truck> <20210204143106.GA20792@willie-the-truck> <20210204174849.GA21303@willie-the-truck> <20210204181317.GE21303@willie-the-truck> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20210204181317.GE21303@willie-the-truck> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210204_132429_012354_88489521 X-CRM114-Status: GOOD ( 12.86 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , devicetree@vger.kernel.org, kernel-team@android.com, Suzuki K Poulose , android-kvm@google.com, Catalin Marinas , Fuad Tabba , linux-kernel@vger.kernel.org, Rob Herring , James Morse , linux-arm-kernel@lists.infradead.org, Marc Zyngier , David Brazdil , Frank Rowand , kvmarm@lists.cs.columbia.edu, Julien Thierry 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 Thursday 04 Feb 2021 at 18:13:18 (+0000), Will Deacon wrote: > I was going from memory, but the loop in __hyp_alloc_pages() searches up to > HYP_MAX_ORDER, whereas this is _never_ going to succeed beyond some per-pool > order determined by the size of the pool. But I doubt it matters -- I > thought we did more than just check a list. Ah, I see -- I was looking at the __hyp_attach_page() loop. I think it's a good point, I should be able to figure out a max order based on the size and alignment of the pool, and cache that in struct hyp_pool to optimize cases where this is < HYP_MAX_ORDER. Should be easy enough, I'll see what I can do in v3. Thanks! Quentin _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel