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=-3.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED 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 AEDD9C433B4 for ; Sat, 1 May 2021 22:07:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8455A61029 for ; Sat, 1 May 2021 22:07:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231655AbhEAV7v (ORCPT ); Sat, 1 May 2021 17:59:51 -0400 Received: from eu-smtp-delivery-151.mimecast.com ([185.58.86.151]:28269 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230235AbhEAV7u (ORCPT ); Sat, 1 May 2021 17:59:50 -0400 Received: from AcuMS.aculab.com (156.67.243.121 [156.67.243.121]) (Using TLS) by relay.mimecast.com with ESMTP id uk-mta-219-XitVAh9wO_qslDbvJLjheA-1; Sat, 01 May 2021 22:58:56 +0100 X-MC-Unique: XitVAh9wO_qslDbvJLjheA-1 Received: from AcuMS.Aculab.com (fd9f:af1c:a25b:0:994c:f5c2:35d6:9b65) by AcuMS.aculab.com (fd9f:af1c:a25b:0:994c:f5c2:35d6:9b65) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Sat, 1 May 2021 22:58:55 +0100 Received: from AcuMS.Aculab.com ([fe80::994c:f5c2:35d6:9b65]) by AcuMS.aculab.com ([fe80::994c:f5c2:35d6:9b65%12]) with mapi id 15.00.1497.015; Sat, 1 May 2021 22:58:55 +0100 From: David Laight To: 'Linus Torvalds' , Tom Stellard CC: Nick Desaulniers , Masahiro Yamada , Nathan Chancellor , "Linux Kernel Mailing List" , clang-built-linux , Fangrui Song , Serge Guelton , Sylvestre Ledru Subject: RE: Very slow clang kernel config .. Thread-Topic: Very slow clang kernel config .. Thread-Index: AQHXPqegH46G91tEpEmd7WaoBDaEqarPJ2lw Date: Sat, 1 May 2021 21:58:55 +0000 Message-ID: <4b77489c05f6459ead7233c3fb69f61e@AcuMS.aculab.com> References: <1c5e05fa-a246-9456-ff4e-287960acb18c@redhat.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 RnJvbTogTGludXMgVG9ydmFsZHMNCj4gU2VudDogMDEgTWF5IDIwMjEgMTc6MzINCj4gDQo+IE9u IEZyaSwgQXByIDMwLCAyMDIxIGF0IDg6MzMgUE0gVG9tIFN0ZWxsYXJkIDx0c3RlbGxhckByZWRo YXQuY29tPiB3cm90ZToNCj4gPg0KPiA+IFllcywgaXQncyBpbnRlbnRpb25hbC4gIER5bmFtaWMg bGlua2luZyBsaWJyYXJpZXMgZnJvbSBvdGhlciBwYWNrYWdlcyBpcw0KPiA+IHRoZSBGZWRvcmEg cG9saWN5WzFdLCBhbmQgY2xhbmcgYW5kIGxsdm0gYXJlIHNlcGFyYXRlIHBhY2thZ2VzIChpbiBG ZWRvcmEpLg0KPiANCj4gU2lkZSBub3RlOiBJIHJlYWxseSB3aXNoIEZlZG9yYSBzdG9wcGVkIGRv aW5nIHRoYXQuDQo+IA0KPiBTaGFyZWQgbGlicmFyaWVzIGFyZSBub3QgYSBnb29kIHRoaW5nIGlu IGdlbmVyYWwuIFRoZXkgYWRkIGEgbG90IG9mDQo+IG92ZXJoZWFkIGluIHRoaXMgY2FzZSwgYnV0 IG1vcmUgaW1wb3J0YW50bHkgdGhleSBhbHNvIGFkZCBsb3RzIG9mDQo+IHVubmVjZXNzYXJ5IGRl cGVuZGVuY2llcyBhbmQgY29tcGxleGl0eSwgYW5kIGFsbW9zdCBubyBzaGFyZWQNCj4gbGlicmFy aWVzIGFyZSBhY3R1YWxseSB2ZXJzaW9uLXNhZmUsIHNvIGl0IGFkZHMgYWJzb2x1dGVseSB6ZXJv DQo+IHVwc2lkZS4NCg0KSXQncyAnc3dpbmdzIGFuZCByb3VuZGFib3V0cycuLi4NCg0KSSB1c2Vk IGEgc3lzdGVtIHdoZXJlIHRoZSBsaWJjLnNvIHRoZSBsaW5rZXIgZm91bmQgd2FzIGFjdHVhbGx5 DQphbiBhcmNoaXZlIGxpYnJhcnksIG9uZSBtZW1iZXIgYmVpbmcgbGliYy5zby4xLg0KVGhlIGZ1 bmN0aW9uIHRoYXQgdXBkYXRlZCB1dG1wIGFuZCB1dG1weCAobGFzdCBsb2dpbiBkZXRhaWxzKQ0K d2FzIGluIHRoZSBhcmNoaXZlIHBhcnQuDQpUaGlzIGNvZGUgaGFkIGluY29ycmVjdCBsb2NraW5n IGFuZCBjb3JydXB0ZWQgdGhlIGZpbGVzLg0KV2hpbGUgdGhlIGZpeCB3YXMgZWFzeSwgZ2V0dGlu ZyBpbiAnaW5zdGFsbGVkJyB3YXNuJ3QgYmVjYXVzZSBhbGwNCnRoZSBwcm9ncmFtcyB0aGF0IHVz ZWQgaXQgbmVlZGVkIHRvIGJlIHJlbGlua2VkIC0gaGFyZCB3aGVuIHNvbWUNCndoZXJlIHByb3Zp ZGVkIGFzIGNvbW1lcmNpYWwgYmluYXJpZXMgYnkgM3JkIHBhcnRpZXMuDQoNCkkndmUgYWxzbyBk b25lIHNvbWUgZXhwZXJpbWVudHMgd2l0aCB0aGUgbW96aWxsYSB3ZWIgYnJvd3Nlci4NClRoaXMg bG9hZGVkIGFib3V0IDMwIGxpYnJhcmllcyBhdCBwcm9ncmFtIHN0YXJ0dXAuDQpUaGUgZWxmIHN5 bWJvbCBoYXNoaW5nIHJ1bGVzIGRvbid0IGhlbHAgYXQgYWxsIQ0KRXZlcnkgc3ltYm9sIGdldHMg bG9va2VkIGZvciBpbiBldmVyeSBsaWJyYXJ5IChvZnRlbiBjaGVja2luZw0KZm9yIGEgbm9uLXdl YWsgc3ltYm9sIGhhdmluZyBmb3VuZCBhIHdlYWsgZGVmaW5pdGlvbikuDQpTbyB0aGUgaGFzaCBv ZiB0aGUgc3ltYm9sIGlzIGNhbGN1bGF0ZWQuDQpJdCBpcyByZW1haW5kZXJlZCBieSB0aGUgaGFz aCB0YWJsZSBzaXplIGFuZCB0aGUgbGlua2VkIGxpc3Qgc2Nhbm5lZC4NCk5vdyB0aGUgaGFzaCB0 YWJsZSBzaXplIGlzIHRoZSBwcmltZSBiZWxvdyB0aGUgcG93ZXIgb2YgMiBiZWxvdw0KdGhlIG51 bWJlciBvZiBzeW1ib2xzICh3ZWxsIHdhcyB3aGVuIEkgZGlkIHRoaXMpLg0KU28gdGhlIGF2ZXJh Z2UgaGFzaCBjaGFpbiBoYXMgYWJvdXQgMS41IGVudHJpZXMuDQpXaXRoIDMwIGxpYnJhcmllcyB0 aGlzIGlzIH40NSBzdHJpbmcgY29tcGFyZXMuDQpJZiBhbGwgdGhlIHN0cmluZ3Mgc3RhcnQgd2l0 aCBzaW1pbGFyIHN0cmluZ3MgKEMrK2NsYXNzZXMpDQp0aGVuIHRoZSBzdHJjbXAoKSBhcmUgcXVp dGUgbG9uZy4NCg0KSSBwbGF5ZWQgYXJvdW5kIHdpdGggdGhlIGhhc2ggdGFibGUgc2l6ZS4NCkl0 IHJlYWxseSBkaWRuJ3QgbWF0dGVyIHdoZXRoZXIgaXQgd2FzIGEgcHJpbWUgb3Igbm90Lg0KRm9y IGxpYmMgdGhlIGRpc3RyaWJ1dGlvbiB3YXMgYWx3YXlzIGhvcnJpZCAtIHdpdGggc29tZQ0KcXVp dGUgbG9uZyBoYXNoIGNoYWlucy4NCk1ha2luZyB0aGUgaGFzaCB0YWJsZSBsYXJnZXIgdGhhbiB0 aGUgbnVtYmVyIG9mIHN5bWJvbHMNCihwZXJoYXBzIDIgcG93ZXJzIG9mIDIgYWJvdmUpIHdvdWxk IGJlIG1vcmUgbGlrZWx5IHRvDQptYWtlIHRoZSBoYXNoIGhpdCBhbiBlbXB0eSBsaXN0IC0gYW5k IHNraXAgYWxsIHRoZSBzdHJjbXAoKS4NCg0KVGhlIG90aGVyICd0cmljaycgd2FzIGEgcmV3cml0 ZSBvZiB0aGUgZHluYW1pYyBsb2FkZXIgdG8NCmdlbmVyYXRlIGEgc2luZ2xlIHN5bWJvbCB0YWJs ZSB0aGF0IGNvbnRhaW5lZCBhbGwgdGhlIHN5bWJvbHMNCm9mIGFsbCB0aGUgbGlicmFyaWVzIGxv YWRlZCBhdCBwcm9ncmFtIHN0YXJ0dXAuDQpQcm9jZXNzIHRoZSBsaWJyYXJpZXMgaW4gdGhlIHJp Z2h0IG9yZGVyIGFuZCB0aGlzIGlzIGVhc3kuDQpUaGF0IG1hZGUgYSBjb25zaWRlcmFibGUgaW1w cm92ZW1lbnQgdG8gcHJvZ3JhbSBzdGFydHVwLg0KDQoJRGF2aWQNCg0KLQ0KUmVnaXN0ZXJlZCBB ZGRyZXNzIExha2VzaWRlLCBCcmFtbGV5IFJvYWQsIE1vdW50IEZhcm0sIE1pbHRvbiBLZXluZXMs IE1LMSAxUFQsIFVLDQpSZWdpc3RyYXRpb24gTm86IDEzOTczODYgKFdhbGVzKQ0K