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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 85EA6C61DA4 for ; Wed, 22 Feb 2023 09:01:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231492AbjBVJBT (ORCPT ); Wed, 22 Feb 2023 04:01:19 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48408 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229975AbjBVJBR (ORCPT ); Wed, 22 Feb 2023 04:01:17 -0500 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 D14C3367F2 for ; Wed, 22 Feb 2023 01:01:15 -0800 (PST) Received: from AcuMS.aculab.com (156.67.243.121 [156.67.243.121]) by relay.mimecast.com with ESMTP with both STARTTLS and AUTH (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id uk-mta-143-23q2w5B5PN6fPRJeaTFZqg-1; Wed, 22 Feb 2023 09:01:11 +0000 X-MC-Unique: 23q2w5B5PN6fPRJeaTFZqg-1 Received: from AcuMS.Aculab.com (10.202.163.4) by AcuMS.aculab.com (10.202.163.4) with Microsoft SMTP Server (TLS) id 15.0.1497.47; Wed, 22 Feb 2023 09:01:05 +0000 Received: from AcuMS.Aculab.com ([::1]) by AcuMS.aculab.com ([::1]) with mapi id 15.00.1497.047; Wed, 22 Feb 2023 09:01:05 +0000 From: David Laight To: 'Matthew Wilcox' , Shakeel Butt CC: Roman Gushchin , Yue Zhao , "linux-mm@kvack.org" , "akpm@linux-foundation.org" , "hannes@cmpxchg.org" , "mhocko@kernel.org" , "muchun.song@linux.dev" , "cgroups@vger.kernel.org" , "linux-kernel@vger.kernel.org" Subject: RE: [PATCH] mm: change memcg->oom_group access with atomic operations Thread-Topic: [PATCH] mm: change memcg->oom_group access with atomic operations Thread-Index: AQHZRfujbWkXm/SALUSQLx6HdIkuPa7ap5/g Date: Wed, 22 Feb 2023 09:01:05 +0000 Message-ID: References: <20230220230624.lkobqeagycx7bi7p@google.com> <6563189C-7765-4FFA-A8F2-A5CC4860A1EF@linux.dev> 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 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org RnJvbTogTWF0dGhldyBXaWxjb3gNCj4gU2VudDogMjEgRmVicnVhcnkgMjAyMyAxMzo1MQ0KLi4u DQo+ID4gRm9yIHRoaXMgcGFydGljdWxhciBjYXNlLCBkb2N1bWVudGluZyBzdWNoIGFuIGFjY2Vz cy4gVGhvdWdoIEkgZG9uJ3QNCj4gPiB0aGluayB0aGVyZSBhcmUgYW55IGFyY2hpdGVjdHVyZXMg d2hpY2ggbWF5IHRlYXIgYSBvbmUgYnl0ZSByZWFkL3dyaXRlDQo+ID4gYW5kIG1lcmdpbmcvcmVm ZXRjaGluZyBpcyBub3QgYW4gaXNzdWUgZm9yIHRoaXMuDQo+IA0KPiBXb3VsZG4ndCBhIGNvbXBp bGVyIGJlIHdpdGhpbiBpdHMgcmlnaHRzIHRvIGltcGxlbWVudCBhIG9uZSBieXRlIHN0b3JlIGFz Og0KPiANCj4gCWxvYWQtd29yZA0KPiAJbW9kaWZ5LWJ5dGUtaW4td29yZA0KPiAJc3RvcmUtd29y ZA0KPiANCj4gYW5kIGlmIHRoaXMgaXMgYSBsb2NrbGVzcyBzdG9yZSB0byBhIHdvcmQgd2hpY2gg aGFzIGFuIGFkamFjZW50IGJ5dGUgYWxzbw0KPiBiZWluZyBtb2RpZmllZCBieSBhbm90aGVyIENQ VSwgb25lIG9mIHRob3NlIENQVXMgY2FuIGxvc2UgaXRzIHN0b3JlPw0KPiBBbmQgV1JJVEVfT05D RSB3b3VsZCBwcmV2ZW50IHRoZSBjb21waWxlciBmcm9tIGltcGxlbWVudGluZyB0aGUgc3RvcmUN Cj4gaW4gdGhhdCB3YXkuDQoNClNvbWUgYWxwaGEgY3B1IGNvdWxkbid0IGRvIGJ5dGUgbWVtb3J5 IGFjY2Vzc2VzIC0gc28gYWx3YXlzDQpkaWQgMzJiaXQgcmVhZC1tb2RpZnktd3JpdGUuIEJ1dCBM aW51eCBkb2Vzbid0IHN1cHBvcnQgdGhvc2UNCm9uZXMgYW55IG1vcmUuDQoNCk9uIGFybSAxNmJp dCBzdHJ1Y3R1cmUgbWVtYmVycyBjYW4gYmUgYWNjZXNzZWQgd2l0aCAzMmJpdA0KaW5zdHJ1Y3Rp b25zIGJlY2F1c2UgdGhlIDE2Yml0IG9uZXMgaGF2ZSBhIHNtYWxsZXIgb2Zmc2V0Lg0KDQpPbiB4 ODYgdGhlIGJpdCBvcGVyYXRpb25zIG1pZ2h0IGFjY2VzcyB0aGUgKHBvc3NpYmx5IG1pc2FsaWdu ZWQpDQozMmJpdCB3b3JkIGNvbnRhaW5pbmcgdGhlIHJlcXVpcmVkIGJpdCAtIGJ1dCB0aGV5IGFy ZSBsb2NrZWQuDQoNCklTVFIgYSBwcm9ibGVtIHdoZXJlIGdjYyB3YXMgdXNpbmcgd2lkZXIgaW5z dHJ1Y3Rpb25zIGFuZA0KZG9pbmcgYSBSTVcgb24gYW4gYWRqYWNlbnQgdm9sYXRpbGUgZmllbGQu DQoNCkkgcmVhbGx5IGNhbid0IHJlbWVtYmVyIHRoZSBqdXN0aWZpY2F0aW9uIGZvciBub3QgbWFy a2luZw0KZmllbGRzIHRoYXQgaGF2ZSB1bmxvY2tlZCBhY2Nlc3NlcyAndm9sYXRpbGUnIGluc3Rl YWQgb2YNCnJlcXVpcmluZyBhbGwgdGhlIGFjY2Vzc2VzIGJlIGRvbmUgYXMgZXhwbGljaXQgdm9s YXRpbGUgb25lcy4NCg0KCURhdmlkDQoNCi0NClJlZ2lzdGVyZWQgQWRkcmVzcyBMYWtlc2lkZSwg QnJhbWxleSBSb2FkLCBNb3VudCBGYXJtLCBNaWx0b24gS2V5bmVzLCBNSzEgMVBULCBVSw0KUmVn aXN0cmF0aW9uIE5vOiAxMzk3Mzg2IChXYWxlcykNCg==