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30.225.28.127(mailfrom:guanghuifeng@linux.alibaba.com fp:SMTPD_---0VIjXe4a_1657283299) by smtp.aliyun-inc.com; Fri, 08 Jul 2022 20:28:20 +0800 Message-ID: Date: Fri, 8 Jul 2022 20:28:18 +0800 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.11.0 Subject: Re: [PATCH RESEND v4] arm64: mm: fix linear mem mapping access performance degradation To: Catalin Marinas Cc: Mike Rapoport , Will Deacon , Ard Biesheuvel , baolin.wang@linux.alibaba.com, akpm@linux-foundation.org, david@redhat.com, jianyong.wu@arm.com, james.morse@arm.com, quic_qiancai@quicinc.com, christophe.leroy@csgroup.eu, jonathan@marek.ca, mark.rutland@arm.com, thunder.leizhen@huawei.com, anshuman.khandual@arm.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, geert+renesas@glider.be, linux-mm@kvack.org, yaohongbo@linux.alibaba.com, alikernel-developer@linux.alibaba.com References: <5d044fdd-a61a-d60f-d294-89e17de37712@linux.alibaba.com> <20220705121115.GB1012@willie-the-truck> <9974bea5-4db9-0104-c9c9-d9b49c390f1b@linux.alibaba.com> From: "guanghui.fgh" In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220708_052825_299162_D7C258D4 X-CRM114-Status: GOOD ( 19.70 ) 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-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org VGhhbmtzLgoK5ZyoIDIwMjIvNy82IDIzOjQwLCBDYXRhbGluIE1hcmluYXMg5YaZ6YGTOgo+IE9u IFdlZCwgSnVsIDA2LCAyMDIyIGF0IDExOjE4OjIyUE0gKzA4MDAsIGd1YW5naHVpLmZnaCB3cm90 ZToKPj4g5ZyoIDIwMjIvNy82IDIxOjU0LCBNaWtlIFJhcG9wb3J0IOWGmemBkzoKPj4+IE9uZSB0 aGluZyBJIGNhbiB0aGluayBvZiBpcyB0byBvbmx5IHJlbWFwIHRoZSBjcmFzaCBrZXJuZWwgbWVt 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