From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A8320C43441 for ; Mon, 26 Nov 2018 10:26:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7806520989 for ; Mon, 26 Nov 2018 10:26:05 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7806520989 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=ACULAB.COM Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726423AbeKZVTn (ORCPT ); Mon, 26 Nov 2018 16:19:43 -0500 Received: from eu-smtp-delivery-151.mimecast.com ([207.82.80.151]:44405 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726105AbeKZVTn (ORCPT ); Mon, 26 Nov 2018 16:19:43 -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-60-4g2VTU3BMqGDiNdLEPZqJw-1; Mon, 26 Nov 2018 10:26:01 +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, 26 Nov 2018 10:26:08 +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, 26 Nov 2018 10:26:08 +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: AQHUgaBY0KBBfG3q00apJLDxEV5GB6VcD8pwgAAXuEiAAPNRcIAAB5wwgABvjYCABE4VAA== Date: Mon, 26 Nov 2018 10:26:08 +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: 4g2VTU3BMqGDiNdLEPZqJw-1 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 RnJvbTogTGludXMgVG9ydmFsZHMNCj4gU2VudDogMjMgTm92ZW1iZXIgMjAxOCAxNjozNg0KLi4u DQo+IEVuZCByZXN1bHQ6IHdlICp1c2VkKiB0byBkbyB0aGlzIHJpZ2h0LiBGb3IgdGhlIGxhc3Qg ZWlnaHQgeWVhcnMgb3VyDQo+ICJtZW1jcHlfe3RvLGZyb219aW8oKSIgaGFzIGJlZW4gZW50aXJl bHkgYnJva2VuLCBhbmQgYXBwYXJlbnRseSBldmVuDQo+IHRoZSBwZW9wbGUgd2hvIG5vdGljZWQg b2RkaXRpZXMgbGlrZSBEYXZpZCwgbmV2ZXIgcmVwb3J0ZWQgaXQgYXMNCj4gYnJlYWthZ2UgYnV0 IGluc3RlYWQganVzdCB3b3JrZWQgYXJvdW5kIGl0IGluIGRyaXZlcnMuDQoNCkkndmUgbWVudGlv bmVkIGl0IHNldmVyYWwgdGltZXMuLi4NCg0KUHJvYmFibHkgbm8gb25lIGVsc2Ugbm90aWNlZCBs b3RzIG9mIHNpbmdsZSBieXRlIHRyYW5zZmVycyB3aGlsZQ0KdGVzdGluZyBhIFRMUCBtb25pdG9y IGhlIHdhcyB3cml0aW5nIGZvciBhbiBGUEdBIDotKQ0KVGhleSBhcmUgZmFyIHRvbyBleHBlbnNp dmUgdG8gYnV5LCBhbmQgd291bGQgbmV2ZXIgYmUgY29ubmVjdGVkDQp0byB0aGUgcmlnaHQgc3lz dGVtIGF0IHRoZSByaWdodCB0aW1lIC0gc28gd2UgKEkpIHdyb3RlIG9uZS4NCg0KVW5mb3J0dW5h dGVseSB3ZSBkb24ndCByZWFsbHkgZ2V0IHRvIHNlZSB3aGF0IGhhcHBlbnMgd2hlbiB0aGUNCmxp bmsgY29tZXMgdXAgKG9yIHJhdGhlciBkb2Vzbid0IGNvbWUgdXApLiBXZSBvbmx5IGdldCB0aGUN CkxUU1NNIHN0YXRlIHRyYW5zaXRpb25zLg0KDQoJRGF2aWQNCg0KLQ0KUmVnaXN0ZXJlZCBBZGRy ZXNzIExha2VzaWRlLCBCcmFtbGV5IFJvYWQsIE1vdW50IEZhcm0sIE1pbHRvbiBLZXluZXMsIE1L MSAxUFQsIFVLDQpSZWdpc3RyYXRpb24gTm86IDEzOTczODYgKFdhbGVzKQ0K