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Tue, 16 May 2023 00:47:22 -0700 (PDT) Received: from [10.70.247.178] ([139.177.225.232]) by smtp.gmail.com with ESMTPSA id p19-20020a63f453000000b005287b22ea8esm12991287pgk.88.2023.05.16.00.47.18 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 16 May 2023 00:47:21 -0700 (PDT) Message-ID: Date: Tue, 16 May 2023 15:47:16 +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 From: Gang Li Subject: Re: [QUESTION FOR ARM64 TLB] performance issue and implementation difference of TLB flush To: Mark Rutland Cc: Will Deacon , 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> <369d1be2-d418-1bfb-bfc2-b25e4e542d76@bytedance.com> <9d976db8-b800-ad84-9c67-0afb942934d9@bytedance.com> Content-Language: en-US In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230516_004727_784613_9BDEEB4E X-CRM114-Status: GOOD ( 15.20 ) 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 SGksCgpPbiAyMDIzLzUvOSAyMjozMCwgTWFyayBSdXRsYW5kIHdyb3RlOgo+IEZvciBleGFtcGxl LCBlYXJseSBpbiBEOC4xMyB3ZSBoYXZlIHRoZSBydWxlOgo+IAo+IHwgUl9TUUJDUwo+IHwKPiB8 ICAgV2hlbiBhZGRyZXNzIHRyYW5zbGF0aW9uIGlzIGVuYWJsZWQsIGEgdHJhbnNsYXRpb24gdGFi bGUgZW50cnkgZm9yIGFuCj4gfCAgIGluLWNvbnRleHQgdHJhbnNsYXRpb24gcmVnaW1lIHRoYXQg ZG9lcyBub3QgY2F1c2UgYSBUcmFuc2xhdGlvbiBmYXVsdCwgYW4KPiB8ICAgQWRkcmVzcyBzaXpl IGZhdWx0LCBvciBhbiBBY2Nlc3MgZmxhZyBmYXVsdCBpcyBwZXJtaXR0ZWQgdG8gYmUgY2FjaGVk IGluIGEKPiB8ICAgVExCIG9yIGludGVybWVkaWF0ZSBUTEIgY2FjaGluZyBzdHJ1Y3R1cmUgYXMg dGhlIHJlc3VsdCBvZiBhbiBleHBsaWNpdCBvcgo+IHwgICBzcGVjdWxhdGl2ZSBhY2Nlc3MuCj4g CgpUaGFua3MgYSBsb3QhCgpJIGxvb2tlZCB1cCB0aGUgeDg2IG1hbnVhbCBhbmQgZm91bmQgdGhh dCB0aGUgeDg2IFRMQiBjYWNoZSBtZWNoYW5pc20gaXMKc2ltaWxhciB0byBhcm02NCAoYnV0IHRo ZSB4ODYgZ3V5cyBoYXZlbid0IHJlcGx5IG1lIHlldCk6CgpJbnRlbMKuIDY0IGFuZCBJQS0zMiBB cmNoaXRlY3R1cmVzIFNvZnR3YXJlIERldmVsb3BlciBNYW51YWxzOgo+IDQuMTAuMi4zIERldGFp bHMgb2YgVExCIFVzZQo+IFN1YmplY3QgdG8gdGhlIGxpbWl0YXRpb25zIGdpdmVuIGluIHRoZSBw cmV2aW91cyBwYXJhZ3JhcGgsIHRoZQo+IHByb2Nlc3NvciBtYXkgY2FjaGUgYSB0cmFuc2xhdGlv biBmb3IgYW55IGxpbmVhciBhZGRyZXNzLCBldmVuIGlmIHRoYXQKPiBhZGRyZXNzIGlzIG5vdCB1 c2VkIHRvIGFjY2VzcyBtZW1vcnkuIEZvciBleGFtcGxlLCB0aGUgcHJvY2Vzc29yIG1heQo+IGNh Y2hlIHRyYW5zbGF0aW9ucyByZXF1aXJlZCBmb3IgcHJlZmV0Y2hlcyBhbmQgZm9yIGFjY2Vzc2Vz IHRoYXQgcmVzdWx0Cj4gZnJvbSBzcGVjdWxhdGl2ZSBleGVjdXRpb24gdGhhdCB3b3VsZCBuZXZl ciBhY3R1YWxseSBvY2N1ciBpbiB0aGUKPiBleGVjdXRlZCBjb2RlIHBhdGguCgpCb3RoIGFyY2hp dGVjdHVyZXMgaGF2ZSBzaW1pbGFyIFRMQiBjYWNoZSBwb2xpY2llcywgd2h5IGFybTY0IGZsdXNo IGFsbAphbmQgeDg2IGZsdXNoIGxvY2FsIGluIGdoZXNfbWFwIGFuZCBnaGVzX3VubWFwPwoKSSB0 aGluayBmbHVzaCBhbGwgbWF5IGJlIHVubmVjZXNzYXJ5LgoKMS4gQmVmb3JlIGFjY2Vzc2luZyBn aGVzIGRhdGEuIEVhY2ggQ1BVIG5lZWRzIHRvIGNhbGwgZ2hlc19tYXAsIHdoaWNoCndpbGwgY3Jl YXRlIHRoZSBtYXBwaW5nIGFuZCBmbHVzaCB0aGVpciBvd24gVExiIHRvIG1ha2Ugc3VyZSB0aGUg Y3VycmVudApDUFUgaXMgdXNpbmcgdGhlIGxhdGVzdCBtYXBwaW5nLgoKMi4gQW5kIHRoZXJlIGlz IG5vIG5lZWQgdG8gZmx1c2ggYWxsIGluIGdoZXNfdW5tYXAsIGJlY2F1c2UgdGhlIGdoZXNfbWFw Cm9mIG90aGVyIENQVXMgd2lsbCBmbHVzaCB0aGVpciBvd24gVExCcyBiZWZvcmUgYWNjZXNzaW5n IHRoZSBtZW1vcnkuCgpXaGF0IGRvIHlvdSB0aGluaz8KClRoYW5rcywKR2FuZyBMaS4KCl9fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmxpbnV4LWFybS1rZXJu ZWwgbWFpbGluZyBsaXN0CmxpbnV4LWFybS1rZXJuZWxAbGlzdHMuaW5mcmFkZWFkLm9yZwpodHRw Oi8vbGlzdHMuaW5mcmFkZWFkLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2xpbnV4LWFybS1rZXJuZWwK