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x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=microsoft.com header.result=pass header_is_org_domain=yes Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965117AbeCSVjW (ORCPT ); Mon, 19 Mar 2018 17:39:22 -0400 Received: from mail-by2nam01on0118.outbound.protection.outlook.com ([104.47.34.118]:14025 "EHLO NAM01-BY2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S965062AbeCSP7O (ORCPT ); Mon, 19 Mar 2018 11:59:14 -0400 From: Sasha Levin To: "linux-kernel@vger.kernel.org" , "stable@vger.kernel.org" CC: Reza Arbab , David Rientjes , Anshuman Khandual , Vlastimil Babka , Mel Gorman , Johannes Weiner , Andrew Morton , Linus Torvalds , Sasha Levin Subject: [PATCH AUTOSEL for 4.9 039/281] mm, vmstat: Remove spurious WARN() during zoneinfo print Thread-Topic: [PATCH AUTOSEL for 4.9 039/281] mm, vmstat: Remove spurious WARN() during zoneinfo print Thread-Index: AQHTv5skXdzuv7AF90SqGyQ+qdiOEg== Date: Mon, 19 Mar 2018 15:58:37 +0000 Message-ID: <20180319155742.13731-39-alexander.levin@microsoft.com> References: <20180319155742.13731-1-alexander.levin@microsoft.com> In-Reply-To: <20180319155742.13731-1-alexander.levin@microsoft.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [52.168.54.252] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1;DM5PR2101MB0726;7:+x+ByIZOpITbvDcPxlBIEAxro9YY/hzvMrZ2wwD8s2UPgEme7lB6JqOobFMYzVt5Z3dsy3HASWTrBqRpn4+cqYBQOfpvSd3A924vKWvka9nJ0m7uEYNflIm40Ao1u10fxBZQncHvVL1w9JdQWo3c7FbFlb5masag4NkGH1HdThGg9pvLOawfAibtV+vHBJoNzvG4YplPFKDUcQA5TNziaddeKXxIGfA/fAdp2i/7P661w7NTU2E04pG8+jiuyQlW;20:TRj7YmpbP4K3rooSnM7ldcCG55fXQJf2u4L+oEqTne/9HPBjMDZKqt34Dp2F7nJHeSszAjKqsntwhWEwyZntkN2lz7Ds8DNNo8VNlg1PxtvdM0HFkv7ut5PB9o5Pm+/56XVPGKrs/SPf9E1IYq7u/lNBHJJNTtIv1bXqHaCcwQk= x-ms-office365-filtering-ht: Tenant x-ms-office365-filtering-correlation-id: a46dbe61-a617-4231-9bff-08d58db255b6 x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:(7020095)(4652020)(48565401081)(5600026)(4604075)(3008032)(4534165)(4627221)(201703031133081)(201702281549075)(2017052603328)(7193020);SRVR:DM5PR2101MB0726; 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x-microsoft-antispam-message-info: 7JIyz7yAt5tS2TqXilWOEvE8DyuaCfhNZS487WuugbYw61Fn9Wx1jq7hav7ZzorYjbUMS6GUKCuuxbzeUKp/ZdXK0sLpSM30aouqqGQPbS4tPNVxNFs40QPOVBijtnhic2nLDGpcDZUb1OBzeqne68sTZZkNlGtoObN+6QypszFNdmdL0w8j/bUB8qftyG6TNqc7+KN9PuIGfe1XxBqn9fPeL9FeXKVxl6ui5RPzjDaO88hIoFbbwtAZ8DVqBpn/1DdjAv2B3wdxRysqvI+krHhTDwqCgXJ4T9Zp0eu955Yk1Oueo3TlCDQcas+g3bKsu8ODOLOIfoN4sHTQ3z3nPA== spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: a46dbe61-a617-4231-9bff-08d58db255b6 X-MS-Exchange-CrossTenant-originalarrivaltime: 19 Mar 2018 15:58:37.0715 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR2101MB0726 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: From: Reza Arbab [ Upstream commit 8d35bb310698c69d73073b26fc581f2e3f7f621d ] After commit e2ecc8a79ed4 ("mm, vmstat: print non-populated zones in zoneinfo"), /proc/zoneinfo will show unpopulated zones. A memoryless node, having no populated zones at all, was previously ignored, but will now trigger the WARN() in is_zone_first_populated(). Remove this warning, as its only purpose was to warn of a situation that has since been enabled. Aside: The "per-node stats" are still printed under the first populated zone, but that's not necessarily the first stanza any more. I'm not sure which criteria is more important with regard to not breaking parsers, but it looks a little weird to the eye. Fixes: e2ecc8a79ed4 ("mm, vmstat: print node-based stats in zoneinfo file"= ) Link: http://lkml.kernel.org/r/1493854905-10918-1-git-send-email-arbab@linu= x.vnet.ibm.com Signed-off-by: Reza Arbab Cc: David Rientjes Cc: Anshuman Khandual Cc: Vlastimil Babka Cc: Mel Gorman Cc: Johannes Weiner Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds Signed-off-by: Sasha Levin --- mm/vmstat.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/mm/vmstat.c b/mm/vmstat.c index 3863b5d6d598..6ad26e3a3820 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -1351,8 +1351,6 @@ static bool is_zone_first_populated(pg_data_t *pgdat,= struct zone *zone) return zone =3D=3D compare; } =20 - /* The zone must be somewhere! */ - WARN_ON_ONCE(1); return false; } =20 --=20 2.14.1