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=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 32F49C4363C for ; Wed, 7 Oct 2020 21:11:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DB92720659 for ; Wed, 7 Oct 2020 21:11:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728345AbgJGVLm (ORCPT ); Wed, 7 Oct 2020 17:11:42 -0400 Received: from eu-smtp-delivery-151.mimecast.com ([185.58.86.151]:59516 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726013AbgJGVLl (ORCPT ); Wed, 7 Oct 2020 17:11:41 -0400 Received: from AcuMS.aculab.com (156.67.243.126 [156.67.243.126]) (Using TLS) by relay.mimecast.com with ESMTP id uk-mta-273-uIL7QyCPPFmHh7zg-MwAdA-1; Wed, 07 Oct 2020 22:11:36 +0100 X-MC-Unique: uIL7QyCPPFmHh7zg-MwAdA-1 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; Wed, 7 Oct 2020 22:11:36 +0100 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; Wed, 7 Oct 2020 22:11:36 +0100 From: David Laight To: "'Luck, Tony'" , Borislav Petkov CC: "Song, Youquan" , "x86@kernel.org" , "linux-kernel@vger.kernel.org" Subject: RE: [PATCH v3 4/6] x86/mce: Avoid tail copy when machine check terminated a copy from user Thread-Topic: [PATCH v3 4/6] x86/mce: Avoid tail copy when machine check terminated a copy from user Thread-Index: AQHWnCT7Akl0tQfunEO6b5w/PLxMVqmLzKMAgACfloCAADZ6cA== Date: Wed, 7 Oct 2020 21:11:35 +0000 Message-ID: <65c0345e142c4c46a5cfd8f8b51489aa@AcuMS.aculab.com> References: <20201005163130.GD21151@zn.tnic> <20201006210910.21062-1-tony.luck@intel.com> <20201006210910.21062-5-tony.luck@intel.com> In-Reply-To: Accept-Language: en-GB, 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 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=C51A453 smtp.mailfrom=david.laight@aculab.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: aculab.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: base64 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org RnJvbTogTHVjaywgVG9ueQ0KPiBTZW50OiAwNyBPY3RvYmVyIDIwMjAgMTk6NTANCj4gPj4gTWFj aGluZSBjaGVja3MgYXJlIG1vcmUgc2VyaW91cy4gSnVzdCBnaXZlIHVwIGF0IHRoZSBwb2ludCB3 aGVyZSB0aGUNCj4gPj4gbWFpbiBjb3B5IGxvb3AgdHJpZ2dlcmVkIHRoZSAjTUMgYW5kIHJldHVy biBmcm9tIHRoZSBjb3B5IGNvZGUgYXMgaWYNCj4gPj4gdGhlIGNvcHkgc3VjY2VlZGVkLiBUaGUg bWFjaGluZSBjaGVjayBoYW5kbGVyIHdpbGwgdXNlIHRhc2tfd29ya19hZGQoKSB0bw0KPiA+PiBt YWtlIHN1cmUgdGhhdCB0aGUgdGFzayBpcyBzZW50IGEgU0lHQlVTLg0KPiA+DQo+ID4gSXNuJ3Qg dGhhdCBqdXN0IHBsYWluIHdyb25nPw0KPiANCj4gSXQgaXNuJ3QgcHJldHR5LiBJJ20gbm90IHN1 cmUgaG93IHdyb25nIGl0IGlzLg0KPiANCj4gPiBJZiBjb3B5IGlzIHJlcG9ydGVkIGFzIHN1Y2Nl ZWRpbmcgdGhlIGtlcm5lbCBjb2RlIHdpbGwgdXNlIHRoZSAnb2xkJw0KPiA+IGRhdGEgdGhhdCBp cyBpbiB0aGUgYnVmZmVyIGFzIGlmIGl0IGhhZCBiZWVuIHJlYWQgZnJvbSB1c2Vyc3BhY2UuDQo+ ID4gVGhpcyBjb3VsZCBlbmQgdXAgd2l0aCBrZXJuZWwgc3RhY2sgZGF0YSBiZWluZyB3cml0dGVu IHRvIGEgZmlsZS4NCj4gDQo+IEkgcmFuIGEgdGVzdCB3aXRoOg0KPiANCj4gCXdyaXRlKGZkLCBi dWYsIDUxMikNCj4gDQo+IFdpdGggcG9pc29uIGluamVjdGVkIGludG8gYnVmWzI1Nl0gdG8gZm9y Y2UgYSBtYWNoaW5lIGNoZWNrIG1pZC1jb3B5Lg0KPiANCj4gVGhlIHNpemUgb2YgdGhlIGZpbGUg ZGlkIGdldCBpbmNyZW1lbnRlZCBieSA1MTIgcmF0aGVyIHRoYW4gMjU2LiBXaGljaCBpc24ndCBn b29kLg0KPiANCj4gVGhlIGRhdGEgaW4gdGhlIGZpbGUgdXAgdG8gdGhlIDI1NiBieXRlIG1hcmsg d2FzIHRoZSB1c2VyIGRhdGEgZnJvbSBidWZbMCAuLi4gMjU1XS4NCj4gDQo+IFRoZSBkYXRhIGlu IHRoZSBmaWxlIHBhc3Qgb2Zmc2V0IDI1NiB3YXMgYWxsIHplcm9lcy4gSSBzdXNwZWN0IHRoYXQg aXNuJ3QgYnkgY2hhbmNlLg0KPiBUaGUga2VybmVsIGhhcyB0byBkZWZlbmQgYWdhaW5zdCBhIHVz ZXIgd3JpdGluZyBhIHBhcnRpYWwgcGFnZSBhbmQgdXNpbmcgbW1hcCgyKQ0KPiBvbiB0aGUgc2Ft ZSBmaWxlIHRvIHBlZWsgYXQgZGF0YSBwYXN0IEVPRiBhbmQgdXAgdG8gdGhlIG5leHQgUEFHRV9T SVpFIGJvdW5kYXJ5Lg0KPiBTbyBJIHRoaW5rIGl0IG11c3QgemVybyBuZXcgcGFnZXMgYWxsb2Nh dGVkIGluIHBhZ2UgY2FjaGUgYXMgdGhleSBhcmUgYWxsb2NhdGVkIHRvDQo+IGEgZmlsZS4NCg0K VGhpbmsgYWJvdXQgd2hhdCBoYXBwZW5zIHRvIGEgZGV2aWNlIHdyaXRlIG9yIGFuIGlvY3RsIHJl cXVlc3QuDQpUaGVzZSB0eXBpY2FsbHkgZ2V0IGNvcGllZCBpbnRvIG9uLXN0YWNrIGJ1ZmZlcnMu DQoNCj4gPiBJSVJDIHRoZSBjb2RlIHRvIHRyeSB0byBtYXhpbWlzZSB0aGUgY29weSBoYXMgYmVl biByZW1vdmVkLg0KPiA+IFNvIHRoZSAnc2xvdycgcmV0cnkgd29udCBoYXBwZW4gYW55IG1vcmUu DQo+IA0KPiBXaGljaCBjb2RlIGhhcyBiZWVuIHJlbW92ZWQgKGFuZCB3aGVuIC4uLiBUSVAsIGFu ZCBteSB0ZXN0aW5nLCBpcyBiYXNlZCBvbiA1LjktcmMxKQ0KDQpUaGUgY29kZSB0aGF0IHJldHJp ZXMgYnl0ZSBieSBieXRlIGFmdGVyIGFuIGluaXRpYWwgZmF1bHQuDQpNaWdodCBvbmx5IGJlIHJl bW92ZWQgZnJvbSAnbmV4dCcgYW5kIGZvciBzb21lIGFyY2hpdGVjdHVyZXMuDQpCYXNpY2FsbHkg YWxtb3N0IG5vdGhpbmcgZXZlciByZWxpZXMgb24gcGFydGlhbCBjb3BpZXMgKGV4Y2VwdCBtb3Vu dCkuDQoNCklJUkMgdGhlcmUgaXMgJ21hZ2ljJyBpbiB0aGUgc3lzY2FsbCBleGl0IHBhdGggdG8g Y29udmVydCBFRkFVTFQNCmludG8gU0lHU0VHVi4NCllvdSBwcm9iYWJseSB3YW50IHRvIGhpamFj ayBpdCB0byBnZW5lcmF0ZSBTSUdCVVM/DQoNCglEYXZpZA0KDQotDQpSZWdpc3RlcmVkIEFkZHJl c3MgTGFrZXNpZGUsIEJyYW1sZXkgUm9hZCwgTW91bnQgRmFybSwgTWlsdG9uIEtleW5lcywgTUsx IDFQVCwgVUsNClJlZ2lzdHJhdGlvbiBObzogMTM5NzM4NiAoV2FsZXMpDQo=