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[2620:137:e000::1:20]) by mx.google.com with ESMTP id dd5-20020a1709069b8500b00780e844b2eesi9746062ejc.482.2022.09.29.07.22.26; Thu, 29 Sep 2022 07:22:52 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=aculab.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235502AbiI2OEm (ORCPT + 99 others); Thu, 29 Sep 2022 10:04:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60924 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234255AbiI2OEk (ORCPT ); Thu, 29 Sep 2022 10:04:40 -0400 Received: from eu-smtp-delivery-151.mimecast.com (eu-smtp-delivery-151.mimecast.com [185.58.86.151]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D5AF921AE for ; Thu, 29 Sep 2022 07:04:37 -0700 (PDT) Received: from AcuMS.aculab.com (156.67.243.121 [156.67.243.121]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id uk-mta-93-KvRyHvuCNsKu02WK6qGEow-1; Thu, 29 Sep 2022 15:04:34 +0100 X-MC-Unique: KvRyHvuCNsKu02WK6qGEow-1 Received: from AcuMS.Aculab.com (10.202.163.4) by AcuMS.aculab.com (10.202.163.4) with Microsoft SMTP Server (TLS) id 15.0.1497.38; Thu, 29 Sep 2022 15:04:32 +0100 Received: from AcuMS.Aculab.com ([::1]) by AcuMS.aculab.com ([::1]) with mapi id 15.00.1497.040; Thu, 29 Sep 2022 15:04:32 +0100 From: David Laight To: 'Vlastimil Babka' , 'Hugh Dickins' CC: Joel Fernandes , Hyeonggon Yoo <42.hyeyoo@gmail.com>, Matthew Wilcox , Andrew Morton , "linux-kernel@vger.kernel.org" , "linux-mm@kvack.org" Subject: RE: amusing SLUB compaction bug when CC_OPTIMIZE_FOR_SIZE Thread-Topic: amusing SLUB compaction bug when CC_OPTIMIZE_FOR_SIZE Thread-Index: AQHY02LHNvo5HN+EEECxPXiP8YKQXa32TN+QgAACrACAACIzUA== Date: Thu, 29 Sep 2022 14:04:31 +0000 Message-ID: <67f53a71f7ae4f518c7e953b8cfce58a@AcuMS.aculab.com> References: <35502bdd-1a78-dea1-6ac3-6ff1bcc073fa@suse.cz> <9368c760191448bba0e062709cc7c799@AcuMS.aculab.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 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 X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org RnJvbTogVmxhc3RpbWlsIEJhYmthDQo+IFNlbnQ6IDI5IFNlcHRlbWJlciAyMDIyIDE0OjAxDQo+ IA0KPiBPbiA5LzI5LzIyIDEzOjUzLCBEYXZpZCBMYWlnaHQgd3JvdGU6DQo+ID4+IC1zdGF0aWMg dm9pZCByY3VfZnJlZV9zbGFiKHN0cnVjdCByY3VfaGVhZCAqaCkNCj4gPj4gKy8qDQo+ID4+ICsg KiByY3VfZnJlZV9zbGFiKCkgbXVzdCBiZSBfX2FsaWduZWQoNCkgYmVjYXVzZSBpdHMgYWRkcmVz cyBpcyBzYXZlZA0KPiA+PiArICogaW4gdGhlIHJjdV9oZWFkIGZpZWxkLCB3aGljaCBjb2luY2lk ZXMgd2l0aCBwYWdlLT5tYXBwaW5nLCB3aGljaA0KPiA+PiArICogY2F1c2VzIHRyb3VibGUgaWYg Y29tcGFjdGlvbiBtaXN0YWtlcyBpdCBmb3IgUEFHRV9NQVBQSU5HX01PVkFCTEUuDQo+ID4+ICsg Ki8NCj4gPj4gK19fYWxpZ25lZCg0KSBzdGF0aWMgdm9pZCByY3VfZnJlZV9zbGFiKHN0cnVjdCBy Y3VfaGVhZCAqaCkNCj4gPj4gIHsNCj4gPj4gIAlzdHJ1Y3Qgc2xhYiAqc2xhYiA9IGNvbnRhaW5l cl9vZihoLCBzdHJ1Y3Qgc2xhYiwgcmN1X2hlYWQpOw0KPiA+Pg0KPiA+DQo+ID4gSXNuJ3QgdGhh dCBnb2luZyB0byBjYXVzZSBncmllZiB3aXRoIG9wdGlvbnMgdGhhdCBhbGlnbg0KPiA+IGZ1bmN0 aW9ucyBvbiAxNi8zMmJ5dGUgYm91bmRhcmllcyB3aGVuIGFkZGluZyBzcGFjZSBmb3INCj4gPiAn b3RoZXIgc3R1ZmYnPw0KPiANCj4gSG93IGlzIHRoYXQgZG9uZSBleGFjdGx5PyBBbHNvIGhhdmlu ZyBoaWdoZXIgYWxpZ25tZW50ICgxNi8zMikgaXMgbm90IGluDQo+IGNvbmZsaWN0IHdpdGggYXNr aW5nIGZvciA0Pw0KDQpJdCBkZXBlbmRzIG9uIHdoaWNoIG9uZSBpcyBhY3R1YWxseSB1c2VkLg0K VGhlIF9fYWxpZ25lZCg0KSBtaWdodCB0YWtlIHByZWNlZGVuY2Ugb3ZlciB0aGUgZGVmYXVsdCBh bGlnbm1lbnQuDQoNCglEYXZpZA0KDQotDQpSZWdpc3RlcmVkIEFkZHJlc3MgTGFrZXNpZGUsIEJy YW1sZXkgUm9hZCwgTW91bnQgRmFybSwgTWlsdG9uIEtleW5lcywgTUsxIDFQVCwgVUsNClJlZ2lz dHJhdGlvbiBObzogMTM5NzM4NiAoV2FsZXMpDQo=