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Wed, 28 Jul 2021 23:30:03 +0000 Date: Wed, 28 Jul 2021 16:30:00 -0700 From: Roman Gushchin To: Shakeel Butt CC: Christoph Lameter , Pekka Enberg , David Rientjes , Vlastimil Babka , Michal Hocko , Wang Hai , Muchun Song , Andrew Morton , , Subject: Re: [PATCH] slub: fix unreclaimable slab stat for bulk free Message-ID: References: <20210728155354.3440560-1-shakeelb@google.com> Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20210728155354.3440560-1-shakeelb@google.com> X-ClientProxiedBy: BYAPR03CA0035.namprd03.prod.outlook.com (2603:10b6:a02:a8::48) To BYAPR15MB4136.namprd15.prod.outlook.com (2603:10b6:a03:96::24) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from carbon.lan (2620:10d:c090:400::5:d9b0) by BYAPR03CA0035.namprd03.prod.outlook.com (2603:10b6:a02:a8::48) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4373.18 via Frontend Transport; Wed, 28 Jul 2021 23:30:02 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: bf8f9404-d3dd-405a-11e5-08d9521f9fea X-MS-TrafficTypeDiagnostic: BYAPR15MB2277: X-Microsoft-Antispam-PRVS: X-FB-Source: Internal X-MS-Oob-TLC-OOBClassifiers: OLM:3173; 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dkim=pass header.d=fb.com header.s=facebook header.b="c/c3nyQZ"; dmarc=pass (policy=reject) header.from=fb.com; spf=pass (imf30.hostedemail.com: domain of "prvs=78431cb8f7=guro@fb.com" designates 67.231.153.30 as permitted sender) smtp.mailfrom="prvs=78431cb8f7=guro@fb.com" X-Stat-Signature: 5izbuirzrw7m4jzkgyuakziswyiqyj4a X-HE-Tag: 1627515018-723184 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Wed, Jul 28, 2021 at 08:53:54AM -0700, Shakeel Butt wrote: > SLUB uses page allocator for higher order allocations and update > unreclaimable slab stat for such allocations. At the moment, the bulk > free for SLUB does not share code with normal free code path for these > type of allocations and have missed the stat update. So, fix the stat > update by common code. The user visible impact of the bug is the > potential of inconsistent unreclaimable slab stat visible through > meminfo and vmstat. > > Fixes: 6a486c0ad4dc ("mm, sl[ou]b: improve memory accounting") > Signed-off-by: Shakeel Butt Acked-by: Roman Gushchin Thanks!