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Wed, 24 Jan 2018 12:24:34 -0500 Received: from mail-dm3nam03on0139.outbound.protection.outlook.com ([104.47.41.139]:52960 "EHLO NAM03-DM3-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S964791AbeAXRYd (ORCPT ); Wed, 24 Jan 2018 12:24:33 -0500 From: Sasha Levin To: Yisheng Xie CC: "linux-kernel@vger.kernel.org" , "stable@vger.kernel.org" , Michal Hocko , Andrew Morton , "Linus Torvalds" Subject: Re: [PATCH AUTOSEL for 4.14 078/100] kmemleak: add scheduling point to kmemleak_scan() Thread-Topic: [PATCH AUTOSEL for 4.14 078/100] kmemleak: add scheduling point to kmemleak_scan() Thread-Index: AQHTlMnpTyJC5yAaR02FyOItdpzpKKOCpU2AgAChgoA= Date: Wed, 24 Jan 2018 17:24:32 +0000 Message-ID: <20180124172431.m6gmke4ndex7xynv@lappy> References: <20180124041414.32065-1-alexander.levin@microsoft.com> <20180124041414.32065-78-alexander.levin@microsoft.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [73.47.72.35] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1;DM5PR2101MB0935;7:NjIrv3teE1Gun7/Rr9HfVSYv7bcqcS3ThOolS3zMBgC8dsT4eawx0Lzhb0+GhJi+92qMuUyIBu1D+u8LiNc2LF2AxZAmDwH+1O2UVS8AngROnFoTvAqIGVA45E6z5hRvJCub4XIYlIhMsq2gn1oBM+jWyybSJs5orrUoAaQrSPZvF8JA2/Vo4ce7oj+m5tc0F8Z6cAa8wN4IM3RL6AU5JcEKOZHOF1DRv2Zxth++3XctB7SedPMZFCaS6Q8YD0r6 x-ms-exchange-antispam-srfa-diagnostics: SSOS; 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authentication-results: spf=none (sender IP is ) smtp.mailfrom=Alexander.Levin@microsoft.com; x-microsoft-antispam-message-info: MMS4yUz3+i5uBBAZjxgk461RfguKUYYC6orPBQ84ONB9vMDdR8/Ii2FOAp9Pqk5x1oYQ0cvVjhyfzVxVZ16BYQ== spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="us-ascii" Content-ID: Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: 7aca99c8-9f17-4b92-385a-08d5634f550f X-MS-Exchange-CrossTenant-originalarrivaltime: 24 Jan 2018 17:24:32.2439 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR2101MB0935 Sender: stable-owner@vger.kernel.org X-Mailing-List: stable@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: On Wed, Jan 24, 2018 at 03:46:27PM +0800, Yisheng Xie wrote: >Hi Sasha, > >There is a fix patch for this patch: > > 13ab183 mm/kmemleak.c: make cond_resched() rate-limiting more efficient > >So if this patch is backported to stable, maybe the above patch is also >need to be backported too. Hi Yisheng, This patch fixes a softlockup, while the patch you linked seems like an performance optimization for this patch, so I'd rather skip it unless you're aware of an actual issue it might fix. -- Thanks, Sasha=