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[209.132.180.67]) by mx.google.com with ESMTP id 24si1121164pgm.167.2019.01.07.01.56.50; Mon, 07 Jan 2019 01:57:06 -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 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726906AbfAGJzK (ORCPT + 99 others); Mon, 7 Jan 2019 04:55:10 -0500 Received: from eu-smtp-delivery-151.mimecast.com ([146.101.78.151]:47634 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726549AbfAGJzJ (ORCPT ); Mon, 7 Jan 2019 04:55:09 -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-119-lHYb6N7aO8u2suev8LZbGg-1; Mon, 07 Jan 2019 09:55:05 +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, 7 Jan 2019 09:55:32 +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, 7 Jan 2019 09:55:32 +0000 From: David Laight To: 'Linus Torvalds' CC: Andrew Lutomirski , "dvlasenk@redhat.com" , Jens Axboe , Ingo Molnar , Thomas Gleixner , Ingo Molnar , "bp@alien8.de" , Peter Anvin , the arch/x86 maintainers , Andrew Morton , Peter Zijlstra , "brgerst@gmail.com" , Linux List Kernel Mailing , "pabeni@redhat.com" Subject: RE: [PATCH] x86: only use ERMS for user copies for larger sizes Thread-Topic: [PATCH] x86: only use ERMS for user copies for larger sizes Thread-Index: AQHUgaBY0KBBfG3q00apJLDxEV5GB6VcD8pwgAAXuEiAAPNRcIAAB5wwgABvjYCABE4VAIA+XC8AgAOb8vA= Date: Mon, 7 Jan 2019 09:55:32 +0000 Message-ID: References: <02bfc577-32a5-66be-64bf-d476b7d447d2@kernel.dk> <20181121063609.GA109082@gmail.com> <48e27a3a-2bb2-ff41-3512-8aeb3fd59e57@kernel.dk> <26eff539-7de7-784c-0c88-f1d30753299d@redhat.com> <7ea44458b90b4d41a08ba9012818d273@AcuMS.aculab.com> <64fd67993af04579b5262c270a7a4694@AcuMS.aculab.com> In-Reply-To: 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: lHYb6N7aO8u2suev8LZbGg-1 X-Mimecast-Spam-Score: 0 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 RnJvbTogTGludXMgVG9ydmFsZHMNCj4gU2VudDogMDUgSmFudWFyeSAyMDE5IDAyOjM5DQouLi4N Cj4gQW55d2F5LCBpdCB3b3VsZCBiZSBsb3ZlbHkgdG8gaGVhciB3aGV0aGVyIG1lbWNweV90b2lv KCkgbm93IHdvcmtzDQo+IHJlYXNvbmFibHkuIEkganVzdCBwaWNrZWQgb3VyIHZlcnkgb2xkIGxl Z2FjeSBmdW5jdGlvbiBmb3IgdGhpcywgc28gaXQNCj4gd2lsbCBkbyB0aGluZ3MgaW4gMzItYml0 IGNodW5rcyAoZXZlbiBvbiB4ODYtNjQpLCBhbmQgSSdtIGNlcnRhaW5seQ0KPiBvcGVuIHRvIHNv bWVib2R5IGRvaW5nIHNvbWV0aGluZyBzbWFydGVyLCBidXQgY29uc2lkZXJpbmcgdGhhdCBub2Jv ZHkNCj4gZWxzZSBzZWVtZWQgdG8gc2hvdyBhbnkgaW50ZXJlc3QgaW4gdGhpcyBhdCBhbGwsIEkg anVzdCB3ZW50DQo+ICJ3aGF0ZXZlciwgZ29vZCBlbm91Z2giLg0KPiANCj4gSSB0cmllZCB0byBt YWtlIGl0IGVhc3kgdG8gaW1wcm92ZSBvbiB0aGluZ3MgaWYgcGVvcGxlIHdhbnQgdG8uDQoNCkkn bGwgZG8gc29tZSB0ZXN0cyBvbmNlIHRoZSBtZXJnZSBoYXMgaGFkIHRpbWUgdG8gc2V0dGxlLg0K DQpJIG5lZWRlZCB0byBvcGVuLWNvZGUgb25lIHBhcnQgYmVjYXVzZSBpdCB3YW50cyB0byBkbyBj b3B5X3RvX3VzZXIoKQ0KZnJvbSBhIFBDSWUgYWRkcmVzcyBidWZmZXIgKHdoaWNoIGhhcyB0byB3 b3JrKS4NCg0KVXNpbmcgNjRiaXQgY2h1bmtzIGZvciByZWFkcyBpcyBwcm9iYWJseSB3b3J0aCB3 aGlsZSBvbiB4ODYtNjQuDQpJIG1pZ2h0IGNvb2sgdXAgYSBwYXRjaC4NCkFjdHVhbGx5LCBpZiB0 aGUgQVZYIHJlZ2lzdGVycyBhcmUgYXZhaWxhYmxlIHdpdGhvdXQgYW4gZnB1IHNhdmUNCnVzaW5n IGxhcmdlciBjaHVua3Mgd291bGQgYmUgd29ydGh3aGlsZSAtIGVzcGVjaWFsbHkgZm9yIGlvIHJl YWRzLg0KDQoJRGF2aWQNCg0KLQ0KUmVnaXN0ZXJlZCBBZGRyZXNzIExha2VzaWRlLCBCcmFtbGV5 IFJvYWQsIE1vdW50IEZhcm0sIE1pbHRvbiBLZXluZXMsIE1LMSAxUFQsIFVLDQpSZWdpc3RyYXRp b24gTm86IDEzOTczODYgKFdhbGVzKQ0K