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Fri, 05 May 2023 02:49:00 -0700 (PDT) Received: from [10.2.117.253] ([61.213.176.8]) by smtp.gmail.com with ESMTPSA id b2-20020a170903228200b001aaffe15f39sm1312598plh.30.2023.05.05.02.48.57 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 05 May 2023 02:49:00 -0700 (PDT) Message-ID: <369d1be2-d418-1bfb-bfc2-b25e4e542d76@bytedance.com> Date: Fri, 5 May 2023 17:48:55 +0800 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:102.0) Gecko/20100101 Thunderbird/102.10.1 Subject: Re: [QUESTION FOR ARM64 TLB] performance issue and implementation difference of TLB flush Content-Language: en-US To: Mark Rutland , Gang Li Cc: Will Deacon , Tomasz Nowicki , Laura Abbott , Catalin Marinas , Ard Biesheuvel , Anshuman Khandual , Kefeng Wang , Feiyang Chen , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org References: <2eb026b8-9e13-2b60-9e14-06417b142ac9@bytedance.com> From: Gang Li In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230505_024909_008803_2727B468 X-CRM114-Status: GOOD ( 24.57 ) 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 VGhpcyBzZXJpZXMgYWNjaWRlbnRhbGx5IGxvc3QgQ0MuIE5vdyBJIGZvcndhcmQgdGhlIGxvc3Qg ZW1haWxzIHRvIHRoZQptYWlsaW5nIGxpc3QuCgpPbiAyMDIzLzQvMjggMTc6MjcsIE1hcmsgUnV0 bGFuZCB3cm90ZToKPiAKPiAKPiBIaSwKPiAKPiBKdXN0IHRvIGNoZWNrIC0tIGRpZCB5b3UgbWVh biB0byBkcm9wIHRoZSBvdGhlciBDY3M/IEl0IHdvdWxkIGJlIGdvb2QgdG8ga2VlcAo+IHRoaXMg ZGlzY3Vzc2lvbiBvbi1saXN0IGlmIHBvc3NpYmxlLgo+IAo+IE9uIEZyaSwgQXByIDI4LCAyMDIz IGF0IDAxOjQ5OjQ2UE0gKzA4MDAsIEdhbmcgTGkgd3JvdGU6Cj4+IE9uIDIwMjMvNC8yNyAxNToz MCwgTWFyayBSdXRsYW5kIHdyb3RlOgo+Pj4gT24gVGh1LCBBcHIgMjcsIDIwMjMgYXQgMTE6MjY6 NTBBTSArMDgwMCwgR2FuZyBMaSB3cm90ZToKPj4+PiAxLiBJIGFtIGN1cmlvdXMgdG8ga25vdyB0 aGUgcmVhc29uIGJlaGluZCB0aGUgZGVzaWduIGNob2ljZSBvZiBmbHVzaGluZwo+Pj4+IHRoZSBU TEIgb24gYWxsIGNvcmVzIGZvciBBUk02NCdzIGNsZWFyX2ZpeG1hcCwgd2hpbGUgQU1ENjQgb25s eSBmbHVzaGVzCj4+Pj4gdGhlIFRMQiBvbiBhIHNpbmdsZSBjb3JlLiBBcmUgdGhlcmUgYW55IFRM QiBkZXNpZ24gZGV0YWlscyB0aGF0IG1ha2UgYQo+Pj4+IGRpZmZlcmVuY2UgaGVyZT8KPj4+Cj4+ PiBJIGRvbid0IGtub3cgd2h5IGFybTY0IG9ubHkgY2xlYXJzIHRoaXMgb24gYSBzaW5nbGUgQ1BV Lgo+Pgo+PiBTb3JyeSwgSSdtIGEgYml0IGNvbmZ1c2VkLgo+Pgo+PiBEaWQgeW91IG1lYW4geW91 IGRvbid0IGtub3cgd2h5ICphbWQ2NCogb25seSBjbGVhcnMgdGhpcyBvbiBhIHNpbmdsZQo+PiBD UFU/Cj4gCj4gWWVzLCBzb3JyeTsgSSBtZWFudCB0byBzYXkgImFtZDY0IiByYXRoZXIgdGhhbiAi YXJtNjQiIGhlcmUuCj4gCj4+IExvb2tzIGxpa2UgSSBzaG91bGQgYXNrIGFtZDY0IGd1eSDwn5iJ Cj4gCj4g8J+YiQo+IAo+Pj4gT24gYXJtNjQgd2UgKm11c3QqIGludmFsaWRhdGUgdGhlIFRMQiBv biBhbGwgQ1BVcyBhcyB0aGUga2VybmVsIHBhZ2UgdGFibGVzIGFyZQo+Pj4gc2hhcmVkIGJ5IGFs bCBDUFVzLCBhbmQgdGhlIGFyY2hpdGVjdHVyYWwgQnJlYWstQmVmb3JlLU1ha2UgcnVsZXMgaW4g cmVxdWlyZQo+Pj4gdGhlIFRMQiB0byBiZSBpbnZhbGlkYXRlZCBiZXR3ZWVuIHR3byB2YWxpZCAo YnV0IGRpc3RpbmN0KSBlbnRyaWVzLgo+Pgo+PiBnaGVzX3VubWFwIGlzIHByb3RlY3RlZCBieSBh IHNwaW5fbG9jaywgc28gb25seSBvbmUgY29yZSBjYW4gYWNjZXNzIHRoaXMKPj4gbWVtIGFyZWEg YXQgYSB0aW1lLiBJIHVuZGVyc3RhbmQgdGhhdCB0aGVyZSB3aWxsIGJlIG5vIFRMQiBmb3IKPj4g dGhpcyBtZW1vcnkgYXJlYSBvbiBvdGhlciBjb3Jlcy4KPj4KPj4gSXMgaXQgYmVjYXVzZSBhcm02 NCBoYXMgc3BlY3VsYXRpdmUgZXhlY3V0aW9uPyBFdmVuIGlmIHRoZSBjb3JlIGRvZXMgbm90Cj4+ IGhvbGQgdGhlIHNwaW5fbG9jaywgdGhlIFRMQiB3aWxsIHN0aWxsIGNhY2hlIHRoZSBjcml0aWNh bCBzZWN0aW9uPwo+IAo+IFRoZSBhcmNoaXRlY3R1cmUgYWxsb3dzIGEgQ1BVIHRvIGFsbG9jYXRl IFRMQiBlbnRyaWVzIGF0IGFueSB0aW1lIGZvciBhbnkKPiByZWFzb24sIGZvciBhbnkgdmFsaWQg dHJhbnNsYXRpb24gdGFibGUgZW50cmllcyByZWFjaGFibGUgZnJvbSB0aGUgcm9vdCBpbgo+IFRU QlJ7MCwxfV9FTHguIFRoYXQgY2FuIGJlIGR1ZSB0byBzcGVjdWxhdGlvbiwgcHJlZmV0Y2hpbmcs IGFuZC9vciBvdGhlcgo+IHJlYXNvbnMuCj4gCj4gRHVlIHRvIHRoYXQsIGl0IGRvZXNuJ3QgbWF0 dGVyIHdoZXRoZXIgb3Igbm90IGEgQ1BVIGV4cGxpY2l0bHkgYWNjZXNzZXMgYQo+IG1lbW9yeSBs b2NhdGlvbiAtLSBUTEIgZW50cmllcyBjYW4gYmUgYWxsb2NhdGVkIHJlZ2FyZGxlc3MuIENvbnNl cXVlbnRseSwgdGhlCj4gc3BpbmxvY2sgZG9lc24ndCBtYWtlIGFueSBkaWZmZXJlbmNlLgo+IAo+ IFRoYW5rcywKPiBNYXJrLgo+IAoKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fCmxpbnV4LWFybS1rZXJuZWwgbWFpbGluZyBsaXN0CmxpbnV4LWFybS1rZXJu ZWxAbGlzdHMuaW5mcmFkZWFkLm9yZwpodHRwOi8vbGlzdHMuaW5mcmFkZWFkLm9yZy9tYWlsbWFu L2xpc3RpbmZvL2xpbnV4LWFybS1rZXJuZWwK