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04 Sep 2019 11:25:23 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.64,467,1559545200"; d="scan'208";a="177033204" Received: from fmsmsx105.amr.corp.intel.com ([10.18.124.203]) by orsmga008.jf.intel.com with ESMTP; 04 Sep 2019 11:25:22 -0700 Received: from crsmsx152.amr.corp.intel.com (172.18.7.35) by FMSMSX105.amr.corp.intel.com (10.18.124.203) with Microsoft SMTP Server (TLS) id 14.3.439.0; Wed, 4 Sep 2019 11:25:22 -0700 Received: from crsmsx101.amr.corp.intel.com ([169.254.1.249]) by CRSMSX152.amr.corp.intel.com ([169.254.5.223]) with mapi id 14.03.0439.000; Wed, 4 Sep 2019 12:25:20 -0600 From: "Weiny, Ira" To: Vlastimil Babka , zhong jiang , "akpm@linux-foundation.org" , "mhocko@kernel.org" CC: "anshuman.khandual@arm.com" , "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" , Aneesh Kumar K.V Subject: RE: [PATCH] mm: Unsigned 'nr_pages' always larger than zero Thread-Topic: [PATCH] mm: Unsigned 'nr_pages' always larger than zero Thread-Index: AQHVYwudPt5si0bTnEuchA1jrW3MqKcbxUIAgAAQYaA= Date: Wed, 4 Sep 2019 18:25:19 +0000 Message-ID: <2807E5FD2F6FDA4886F6618EAC48510E898E9559@CRSMSX101.amr.corp.intel.com> References: <1567592763-25282-1-git-send-email-zhongjiang@huawei.com> <5505fa16-117e-8890-0f48-38555a61a036@suse.cz> In-Reply-To: <5505fa16-117e-8890-0f48-38555a61a036@suse.cz> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-titus-metadata-40: eyJDYXRlZ29yeUxhYmVscyI6IiIsIk1ldGFkYXRhIjp7Im5zIjoiaHR0cDpcL1wvd3d3LnRpdHVzLmNvbVwvbnNcL0ludGVsMyIsImlkIjoiODllZjE3YTUtMmZhZS00ODU1LWFkODUtNzhmZTg2Njk3Mjc0IiwicHJvcHMiOlt7Im4iOiJDVFBDbGFzc2lmaWNhdGlvbiIsInZhbHMiOlt7InZhbHVlIjoiQ1RQX05UIn1dfV19LCJTdWJqZWN0TGFiZWxzIjpbXSwiVE1DVmVyc2lvbiI6IjE3LjEwLjE4MDQuNDkiLCJUcnVzdGVkTGFiZWxIYXNoIjoiRWZONTQ1TzdDbWVJS0VybXRybzRSc0tVMjBWandWN1dkbnFKWFk0XC9tZytkTEtsNHdubkFrSHc4RUZWREg3dGcifQ== x-ctpclassification: CTP_NT dlp-product: dlpe-windows dlp-version: 11.2.0.6 dlp-reaction: no-action x-originating-ip: [172.18.205.10] Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 MIME-Version: 1.0 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: PiBPbiA5LzQvMTkgMTI6MjYgUE0sIHpob25nIGppYW5nIHdyb3RlOg0KPiA+IFdpdGggdGhlIGhl bHAgb2YgdW5zaWduZWRfbGVzc2VyX3RoYW5femVyby5jb2NjaS4gVW5zaWduZWQgJ25yX3BhZ2Vz IicNCj4gPiBjb21wYXJlIHdpdGggemVyby4gQW5kIF9fZ2V0X3VzZXJfcGFnZXNfbG9ja2VkIHdp bGwgcmV0dXJuIGFuIGxvbmcNCj4gdmFsdWUuDQo+ID4gSGVuY2UsIENvbnZlcnQgdGhlIGxvbmcg dG8gY29tcGFyZSB3aXRoIHplcm8gaXMgZmVhc2libGUuDQo+IA0KPiBJdCB3b3VsZCBiZSBuaWNl ciBpZiB0aGUgcGFyYW1ldGVyIG5yX3BhZ2VzIHdhcyBsb25nIGFnYWluIGluc3RlYWQgb2YNCj4g dW5zaWduZWQgbG9uZyAobm90ZSB0aGVyZSBhcmUgdHdvIHZhcmlhbnRzIG9mIHRoZSBmdW5jdGlv biwgc28gYm90aCBzaG91bGQgYmUNCj4gY2hhbmdlZCkuDQoNCldoeT8gIFdoYXQgZG9lcyBpdCBt ZWFuIGZvciBucl9wYWdlcyB0byBiZSBuZWdhdGl2ZT8gIFRoZSBjaGVjayBiZWxvdyBzZWVtcyB2 YWxpZC4gIFVuc2lnbmVkIGNhbiBiZSAwIHNvIHRoZSBjaGVjayBjYW4gZmFpbC4gIElPVyBDaGVj a2luZyB1bnNpZ25lZCA+IDAgc2VlbXMgb2suDQoNCldoYXQgYW0gSSBtaXNzaW5nPw0KDQpJcmEN Cg0KPiANCj4gPiBTaWduZWQtb2ZmLWJ5OiB6aG9uZyBqaWFuZyA8emhvbmdqaWFuZ0BodWF3ZWku Y29tPg0KPiANCj4gRml4ZXM6IDkzMmY0YTYzMGE2OSAoIm1tL2d1cDogcmVwbGFjZSBnZXRfdXNl cl9wYWdlc19sb25ndGVybSgpIHdpdGgNCj4gRk9MTF9MT05HVEVSTSIpDQo+IA0KPiAod2hpY2gg Y2hhbmdlZCBsb25nIHRvIHVuc2lnbmVkIGxvbmcpDQo+IA0KPiBBRkFJQ1MuLi4gc3RhYmxlIHNo b3VsZG4ndCBiZSBuZWVkZWQgYXMgdGhlIG9ubHkgInJpc2siIGlzIHRoYXQgd2UgZ290bw0KPiBj aGVja19hZ2FpbiBldmVuIHdoZW4gd2UgZmFpbCwgd2hpY2ggc2hvdWxkIGJlIGhhcm1sZXNzLg0K PiANCj4gVmxhc3RpbWlsDQo+IA0KPiA+IC0tLQ0KPiA+ICBtbS9ndXAuYyB8IDIgKy0NCj4gPiAg MSBmaWxlIGNoYW5nZWQsIDEgaW5zZXJ0aW9uKCspLCAxIGRlbGV0aW9uKC0pDQo+ID4NCj4gPiBk aWZmIC0tZ2l0IGEvbW0vZ3VwLmMgYi9tbS9ndXAuYw0KPiA+IGluZGV4IDIzYTlmOWMuLjk1NmQ1 YTEgMTAwNjQ0DQo+ID4gLS0tIGEvbW0vZ3VwLmMNCj4gPiArKysgYi9tbS9ndXAuYw0KPiA+IEBA IC0xNTA4LDcgKzE1MDgsNyBAQCBzdGF0aWMgbG9uZyBjaGVja19hbmRfbWlncmF0ZV9jbWFfcGFn ZXMoc3RydWN0DQo+IHRhc2tfc3RydWN0ICp0c2ssDQo+ID4gIAkJCQkJCSAgIHBhZ2VzLCB2bWFz LCBOVUxMLA0KPiA+ICAJCQkJCQkgICBndXBfZmxhZ3MpOw0KPiA+DQo+ID4gLQkJaWYgKChucl9w YWdlcyA+IDApICYmIG1pZ3JhdGVfYWxsb3cpIHsNCj4gPiArCQlpZiAoKChsb25nKW5yX3BhZ2Vz ID4gMCkgJiYgbWlncmF0ZV9hbGxvdykgew0KPiA+ICAJCQlkcmFpbl9hbGxvdyA9IHRydWU7DQo+ ID4gIAkJCWdvdG8gY2hlY2tfYWdhaW47DQo+ID4gIAkJfQ0KPiA+DQoNCg==