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 X-Spam-Level: X-Spam-Status: No, score=-3.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1F5D4C35249 for ; Wed, 5 Feb 2020 06:49:32 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id ADD2C2082E for ; Wed, 5 Feb 2020 06:49:31 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org ADD2C2082E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 08F856B0005; Wed, 5 Feb 2020 01:49:31 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 01A736B0006; Wed, 5 Feb 2020 01:49:30 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id E24B66B0007; Wed, 5 Feb 2020 01:49:30 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0103.hostedemail.com [216.40.44.103]) by kanga.kvack.org (Postfix) with ESMTP id C418D6B0005 for ; Wed, 5 Feb 2020 01:49:30 -0500 (EST) Received: from smtpin24.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 71D60180AD804 for ; Wed, 5 Feb 2020 06:49:30 +0000 (UTC) X-FDA: 76455147300.24.step04_35b5c41496949 X-HE-Tag: step04_35b5c41496949 X-Filterd-Recvd-Size: 6851 Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by imf44.hostedemail.com (Postfix) with ESMTP for ; Wed, 5 Feb 2020 06:49:28 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga007.jf.intel.com ([10.7.209.58]) by fmsmga102.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 04 Feb 2020 22:49:26 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,404,1574150400"; d="scan'208";a="220004772" Received: from fmsmsx108.amr.corp.intel.com ([10.18.124.206]) by orsmga007.jf.intel.com with ESMTP; 04 Feb 2020 22:49:26 -0800 Received: from fmsmsx606.amr.corp.intel.com (10.18.126.86) by FMSMSX108.amr.corp.intel.com (10.18.124.206) with Microsoft SMTP Server (TLS) id 14.3.439.0; Tue, 4 Feb 2020 22:49:26 -0800 Received: from fmsmsx606.amr.corp.intel.com (10.18.126.86) by fmsmsx606.amr.corp.intel.com (10.18.126.86) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1713.5; Tue, 4 Feb 2020 22:49:25 -0800 Received: from shsmsx103.ccr.corp.intel.com (10.239.4.69) by fmsmsx606.amr.corp.intel.com (10.18.126.86) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.1.1713.5 via Frontend Transport; Tue, 4 Feb 2020 22:49:25 -0800 Received: from shsmsx102.ccr.corp.intel.com ([169.254.2.126]) by SHSMSX103.ccr.corp.intel.com ([169.254.4.196]) with mapi id 14.03.0439.000; Wed, 5 Feb 2020 14:49:24 +0800 From: "Wang, Wei W" To: David Hildenbrand , "Michael S. Tsirkin" CC: Nadav Amit , Alexander Duyck , Tyler Sanderson , "virtualization@lists.linux-foundation.org" , David Rientjes , "linux-mm@kvack.org" , "Michal Hocko" Subject: RE: Balloon pressuring page cache Thread-Topic: Balloon pressuring page cache Thread-Index: AQHV1jovoZrFI2PKjUOgo5GIAcuyoKgA6/YAgACRPICAAUzXAIAAibNg///JVwCABdc9AIAANGSAgAAETACAAGklgIAAo12AgAABfACAAGGxgIABj+gw Date: Wed, 5 Feb 2020 06:49:23 +0000 Message-ID: <286AC319A985734F985F78AFA26841F73E41F0F0@shsmsx102.ccr.corp.intel.com> References: <91270a68-ff48-88b0-219c-69801f0c252f@redhat.com> <75d4594f-0864-5172-a0f8-f97affedb366@redhat.com> <286AC319A985734F985F78AFA26841F73E3F8A02@shsmsx102.ccr.corp.intel.com> <20200203080520-mutt-send-email-mst@kernel.org> <5ac131de8e3b7fc1fafd05a61feb5f6889aeb917.camel@linux.intel.com> <539B606A-A0CA-4AA4-B99A-759C874A1EF8@vmware.com> <20200204033657-mutt-send-email-mst@kernel.org> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: dlp-product: dlpe-windows dlp-version: 11.2.0.6 dlp-reaction: no-action x-originating-ip: [10.239.127.40] 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: T24gVHVlc2RheSwgRmVicnVhcnkgNCwgMjAyMCAxMDozMCBQTSwgRGF2aWQgSGlsZGVuYnJhbmQg d3JvdGU6DQo+IFNvLCBJIGFtIHRyeWluZyB0byB1bmRlcnN0YW5kIGhvdyB0aGUgY29kZSBpcyBp bnRlbmRlZCB0byB3b3JrLCBidXQgSSBhbQ0KPiBhZnJhaWQgSSBhbSBtaXNzaW5nIHNvbWV0aGlu ZyAob3IgdG8gcmVwaHJhc2U6IEkgdGhpbmsgSSBmb3VuZCBhIEJVRyA6KSBhbmQNCj4gdGhlcmUg aXMgbGFjayBvZiBwcm9wZXIgZG9jdW1lbnRhdGlvbiBhYm91dCB0aGlzIGZlYXR1cmUpLg0KPiAN Cj4gYSkgV2UgYWxsb2NhdGUgcGFnZXMgYW5kIGFkZCB0aGVtIHRvIHRoZSBsaXN0IGFzIGxvbmcg YXMgd2UgYXJlIHRvbGQgdG8gZG8NCj4gc28uDQo+ICAgIFdlIHNlbmQgdGhlc2UgcGFnZXMgdG8g dGhlIGhvc3Qgb25lIGJ5IG9uZS4NCj4gYikgV2UgZnJlZSBhbGwgcGFnZXMgb25jZSB3ZSBnZXQg YSBTVE9QIHNpZ25hbC4gVW50aWwgdGhlbiwgd2Uga2VlcCBwYWdlcw0KPiBhbGxvY2F0ZWQuDQoN Clllcy4gRWl0aGVyIGhvc3Qgc2VuZHMgdG8gdGhlIGd1ZXN0IGEgU1RPUCBjbWQgb3Igd2hlbiB0 aGUgZ3Vlc3QgZmFpbHMgdG8gYWxsb2NhdGUgYSBwYWdlIChtZWFuaW5nIHRoYXQgYWxsIHRoZSBw b3NzaWJsZSBmcmVlIHBhZ2VzIGFyZSB0YWtlbiBhbHJlYWR5KSwNCnRoZSByZXBvcnRpbmcgZW5k cy4NCg0KPiBjKSBXaGVuIGNhbGxlZCB2aWEgdGhlIHNocmlua2VyLCB3ZSB3YW50IHRvIGZyZWUg cGFnZXMgZnJvbSB0aGUgbGlzdCwgZXZlbg0KPiB0aG91Z2ggdGhlIGh5cGVydmlzb3IgZGlkIG5v dCBub3RpZnkgdXMgdG8gZG8gc28uDQo+IA0KPiANCj4gSXNzdWUgMTogV2hlbiB3ZSB1bmxvYWQg dGhlIGJhbGxvb24gZHJpdmVyIGluIHRoZSBndWVzdCBpbiBhbiB1bmx1Y2t5IGV2ZW50LA0KPiB3 ZSB3b24ndCBmcmVlIHRoZSBwYWdlcy4gV2UgYXJlIG1pc3Npbmcgc29tZXRoaW5nIGxpa2UgKGlm IEkgYW0gbm90IHdyb25nKToNCj4gDQo+IGRpZmYgLS1naXQgYS9kcml2ZXJzL3ZpcnRpby92aXJ0 aW9fYmFsbG9vbi5jIGIvZHJpdmVycy92aXJ0aW8vdmlydGlvX2JhbGxvb24uYw0KPiBpbmRleCBi MWQyMDY4ZmEyYmQuLmUyYjA5MjVlMWU4MyAxMDA2NDQNCj4gLS0tIGEvZHJpdmVycy92aXJ0aW8v dmlydGlvX2JhbGxvb24uYw0KPiArKysgYi9kcml2ZXJzL3ZpcnRpby92aXJ0aW9fYmFsbG9vbi5j DQo+IEBAIC05MjksNiArOTI5LDEwIEBAIHN0YXRpYyB2b2lkIHJlbW92ZV9jb21tb24oc3RydWN0 IHZpcnRpb19iYWxsb29uDQo+ICp2YikNCj4gICAgICAgICAgICAgICAgIGxlYWtfYmFsbG9vbih2 YiwgdmItPm51bV9wYWdlcyk7DQo+ICAgICAgICAgdXBkYXRlX2JhbGxvb25fc2l6ZSh2Yik7DQo+ IA0KPiArICAgICAgIC8qIFRoZXJlIG1pZ2h0IGJlIGZyZWUgcGFnZXMgdGhhdCBhcmUgYmVpbmcg cmVwb3J0ZWQ6IHJlbGVhc2UgdGhlbS4NCj4gKi8NCj4gKyAgICAgICBpZiAodmlydGlvX2hhc19m ZWF0dXJlKHZiLT52ZGV2LA0KPiBWSVJUSU9fQkFMTE9PTl9GX0ZSRUVfUEFHRV9ISU5UKSkNCj4g KyAgICAgICAgICAgICAgIHJldHVybl9mcmVlX3BhZ2VzX3RvX21tKHZiLCBVTE9OR19NQVgpOw0K PiArDQo+ICAgICAgICAgLyogTm93IHdlIHJlc2V0IHRoZSBkZXZpY2Ugc28gd2UgY2FuIGNsZWFu IHVwIHRoZSBxdWV1ZXMuICovDQo+ICAgICAgICAgdmItPnZkZXYtPmNvbmZpZy0+cmVzZXQodmIt PnZkZXYpOw0KDQoNClJpZ2h0LCB0aGFua3MhDQoNCj4gDQo+IA0KPiBJc3N1ZSAyOiBXaGVuIGNh bGxlZCB2aWEgdGhlIHNocmlua2VyLCAoYnV0IGFsc28gdG8gZml4IElzc3VlIDEpLCBpdCBjb3Vs ZCBiZSB0aGF0DQo+IHdlIGRvIGhhdmUgVklSVElPX0JBTExPT05fRl9NVVNUX1RFTExfSE9TVC4g DQoNCkkgZG9uJ3QgdGhpbmsgaXQgaXMgYW4gaXNzdWUgaGVyZS4NCk1VU1RfVEVMTF9IT1NUIGlz IGZvciB0aGUgYmFsbG9vbmluZyBwYWdlcywgd2hlcmUgcGFnZXMgYXJlIG9mZmVyZWQgdG8gaG9z dCB0byBfVVNFXy4NCkZvciBmcmVlIHBhZ2UgaGludCwgYXMgdGhlIG5hbWUgYWxyZWFkeSBzdWdn ZXN0cywgaXQncyBqdXN0IGEgX0hJTlRfICwgc28gaW4gd2hhdGV2ZXIgdXNlIGNhc2UsDQp0aGUg aG9zdCBzaG91bGQgbm90IHRha2UgdGhlIHBhZ2UgdG8gdXNlLiBTbyB0aGUgZ3Vlc3QgZG9lc24n dCBuZWVkIHRvIHRlbGwgaG9zdCBhbmQgd2FpdC4NCg0KQmFjayB0byB0aGUgaW1wbGVtZW50YXRp b24gb2YgdmlydGlvX2JhbGxvb25fc2hyaW5rZXJfc2Nhbiwgd2hpY2ggSSBkb24ndCBzZWUgYW4g aXNzdWUgc28gZmFyOg0Kc2hyaW5rX2ZyZWVfcGFnZXMganVzdCByZXR1cm4gcGFnZXMgdG8gbW0g d2l0aG91dCB3YWl0aW5nIGZvciB0aGUgYWNrIGZyb20gaG9zdA0Kc2hyaW5rX2JhbGxvb25fcGFn ZXMgZ29lcyB0aHJvdWdoIGxlYWtfYmFsbG9vbiB3aGljaCB0ZWxsX2hvc3QgYmVmb3JlIHJlbGVh c2UgdGhlIGJhbGxvb24gcGFnZXMuDQoNCkJlc3QsDQpXZWkNCg0K