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[209.132.180.67]) by mx.google.com with ESMTP id d13si7472610oig.67.2020.02.03.09.46.38; Mon, 03 Feb 2020 09:47:06 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=aculab.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728117AbgBCPkI (ORCPT + 99 others); Mon, 3 Feb 2020 10:40:08 -0500 Received: from eu-smtp-delivery-151.mimecast.com ([146.101.78.151]:52140 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727606AbgBCPkI (ORCPT ); Mon, 3 Feb 2020 10:40:08 -0500 Received: from AcuMS.aculab.com (156.67.243.126 [156.67.243.126]) (Using TLS) by relay.mimecast.com with ESMTP id uk-mta-183-INfOXLASNUmZXlA7243NPA-1; Mon, 03 Feb 2020 15:40:05 +0000 Received: from AcuMS.Aculab.com (fd9f:af1c:a25b:0:43c:695e:880f:8750) by AcuMS.aculab.com (fd9f:af1c:a25b:0:43c:695e:880f:8750) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Mon, 3 Feb 2020 15:40:04 +0000 Received: from AcuMS.Aculab.com ([fe80::43c:695e:880f:8750]) by AcuMS.aculab.com ([fe80::43c:695e:880f:8750%12]) with mapi id 15.00.1347.000; Mon, 3 Feb 2020 15:40:04 +0000 From: David Laight To: 'Eric Dumazet' , Neal Cardwell CC: "sjpark@amazon.com" , Eric Dumazet , David Miller , "shuah@kernel.org" , Netdev , "linux-kselftest@vger.kernel.org" , LKML , "sj38.park@gmail.com" , "aams@amazon.com" , SeongJae Park , Yuchung Cheng Subject: RE: [PATCH 2/3] tcp: Reduce SYN resend delay if a suspicous ACK is received Thread-Topic: [PATCH 2/3] tcp: Reduce SYN resend delay if a suspicous ACK is received Thread-Index: AQHV2IlPJWOIosB7x0WML/igObqFf6gJnv4A Date: Mon, 3 Feb 2020 15:40:04 +0000 Message-ID: <5a8c1658de8f49b2994d19d371c13c79@AcuMS.aculab.com> References: <20200131122421.23286-1-sjpark@amazon.com> <20200131122421.23286-3-sjpark@amazon.com> <7d36a817-5519-8496-17cf-00eda5ed4ec7@gmail.com> In-Reply-To: <7d36a817-5519-8496-17cf-00eda5ed4ec7@gmail.com> Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.202.205.107] MIME-Version: 1.0 X-MC-Unique: INfOXLASNUmZXlA7243NPA-1 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: aculab.com Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: base64 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org RnJvbTogRXJpYyBEdW1hemV0DQo+IFNlbnQ6IDMxIEphbnVhcnkgMjAyMCAyMjo1NA0KPiBPbiAx LzMxLzIwIDI6MTEgUE0sIE5lYWwgQ2FyZHdlbGwgd3JvdGU6DQo+IA0KPiA+IEkgbG9va2VkIGlu dG8gZml4aW5nIHRoaXMsIGJ1dCBteSBxdWljayByZWFkaW5nIG9mIHRoZSBMaW51eA0KPiA+IHRj cF9yY3Zfc3RhdGVfcHJvY2VzcygpIGNvZGUgaXMgdGhhdCBpdCBzaG91bGQgYmVoYXZlIGNvcnJl Y3RseSBhbmQNCj4gPiB0aGF0IGEgY29ubmVjdGlvbiBpbiBGSU5fV0FJVF8xIHRoYXQgcmVjZWl2 ZXMgYSBGSU4vQUNLIHNob3VsZCBtb3ZlIHRvDQo+ID4gVElNRV9XQUlULg0KPiA+DQo+ID4gU2Vv bmdKYWUsIGRvIHlvdSBoYXBwZW4gdG8gaGF2ZSBhIHRjcGR1bXAgdHJhY2Ugb2YgdGhlIHByb2Js ZW1hdGljDQo+ID4gc2VxdWVuY2Ugd2hlcmUgdGhlICJwcm9jZXNzIEEiIGVuZHMgdXAgaW4gRklO X1dBSVRfMiB3aGVuIGl0IHNob3VsZCBiZQ0KPiA+IGluIFRJTUVfV0FJVD8NCj4gPg0KPiA+IElm IEkgaGF2ZSB0aW1lIEkgd2lsbCB0cnkgdG8gY29uc3RydWN0IGEgcGFja2V0ZHJpbGwgY2FzZSB0 byB2ZXJpZnkNCj4gPiB0aGUgYmVoYXZpb3IgaW4gdGhpcyBjYXNlLg0KPiANCj4gVW5mb3J0dW5h dGVseSB5b3Ugd29udCBiZSBhYmxlIHRvIHJlcHJvZHVjZSB0aGUgaXNzdWUgd2l0aCBwYWNrZXRk cmlsbCwNCj4gc2luY2UgaXQgaW52b2x2ZWQgcGFja2V0cyBiZWluZyBwcm9jZXNzZWQgYXQgdGhl IHNhbWUgdGltZSAocmFjZSB3aW5kb3cpDQoNCllvdSBtaWdodCBiZSBhYmxlIHRvIGZvcmNlIHRo ZSB0aW1pbmcgcmFjZSBieSBhZGRpbmcgYSBzbGVlcA0KaW4gb25lIG9mIHRoZSBjb2RlIHBhdGhz Lg0KDQpObyBnb29kIGZvciBhIHJlZ3Jlc3Npb24gdGVzdCwgYnV0IG9rIGZvciBjb2RlIHRlc3Rp bmcuDQoNCglEYXZpZA0KDQotDQpSZWdpc3RlcmVkIEFkZHJlc3MgTGFrZXNpZGUsIEJyYW1sZXkg Um9hZCwgTW91bnQgRmFybSwgTWlsdG9uIEtleW5lcywgTUsxIDFQVCwgVUsNClJlZ2lzdHJhdGlv biBObzogMTM5NzM4NiAoV2FsZXMpDQo=