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 E6C5BC43441 for ; Thu, 22 Nov 2018 17:36:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B873B20684 for ; Thu, 22 Nov 2018 17:36:36 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B873B20684 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 S2406432AbeKWEQ4 (ORCPT ); Thu, 22 Nov 2018 23:16:56 -0500 Received: from eu-smtp-delivery-151.mimecast.com ([146.101.78.151]:38549 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727522AbeKWEQ4 (ORCPT ); Thu, 22 Nov 2018 23:16:56 -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-131-lvsNkvxyO-yruosD5DLwNw-1; Thu, 22 Nov 2018 17:36:31 +0000 Received: from AcuMS.Aculab.com (fd9f:af1c:a25b::d117) by AcuMS.aculab.com (fd9f:af1c:a25b::d117) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Thu, 22 Nov 2018 17:36:38 +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; Thu, 22 Nov 2018 17:36:38 +0000 From: David Laight To: 'Denys Vlasenko' , Jens Axboe , "Ingo Molnar" CC: Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H. Peter Anvin" , "the arch/x86 maintainers" , Linus Torvalds , Andrew Morton , Andy Lutomirski , Peter Zijlstra , Brian Gerst , "linux-kernel@vger.kernel.org" , "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: AQHUgaBY0KBBfG3q00apJLDxEV5GB6VcD8pw Date: Thu, 22 Nov 2018 17:36:37 +0000 Message-ID: <7ea44458b90b4d41a08ba9012818d273@AcuMS.aculab.com> 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> In-Reply-To: <26eff539-7de7-784c-0c88-f1d30753299d@redhat.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: lvsNkvxyO-yruosD5DLwNw-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 RnJvbTogRGVueXMgVmxhc2Vua28NCj4gU2VudDogMjEgTm92ZW1iZXIgMjAxOCAxMzo0NA0KLi4u DQo+IEkgYWxzbyB0ZXN0ZWQgdGhpcyB3aGlsZSB3b3JraW5nIGZvciBzdHJpbmcgb3BzIGNvZGUg aW4gbXVzbC4NCj4gDQo+IEkgdGhpbmsgYXQgbGVhc3QgMTI4IGJ5dGVzIHdvdWxkIGJlIHRoZSBt aW5pbXVtIHdoZXJlICJSRVAgaW5zbiINCj4gYXJlIG1vcmUgZWZmaWNpZW50LiBJbiBteSB0ZXN0 aW5nLCBpdCdzIG1vcmUgbGlrZSAyNTYgYnl0ZXMuLi4NCg0KV2hhdCBoYXBwZW5zIGZvciBtaXNh bGlnbmVkIGNvcGllcz8NCkkgaGFkIGEgZmVlbGluZyB0aGF0IHRoZSBFUk1TICdyZWIgbW92c2In IGNvZGUgdXNlZCBzb21lIGtpbmQNCm9mIGJhcnJlbCBzaGlmdGVyIGluIHRoYXQgY2FzZS4NCg0K VGhlIG90aGVyIHByb2JsZW0gd2l0aCB0aGUgRVJNUyBjb3B5IGlzIHRoYXQgaXQgZ2V0cyB1c2Vk DQpmb3IgY29weV90by9mcm9tX2lvKCkgLSBhbmQgdGhlICdyZXAgbW92c2InIG9uIHVuY2FjaGVk DQpsb2NhdGlvbnMgaGFzIHRvIGRvIGJ5dGUgY29waWVzLg0KQnl0ZSByZWFkcyBvbiBQQ0llIGFy ZSByZWFsbHkgaG9ycmlkLg0KDQoJRGF2aWQNCg0KLQ0KUmVnaXN0ZXJlZCBBZGRyZXNzIExha2Vz aWRlLCBCcmFtbGV5IFJvYWQsIE1vdW50IEZhcm0sIE1pbHRvbiBLZXluZXMsIE1LMSAxUFQsIFVL DQpSZWdpc3RyYXRpb24gTm86IDEzOTczODYgKFdhbGVzKQ0K