Received: by 2002:ac0:8845:0:0:0:0:0 with SMTP id g63csp564147img; Thu, 28 Feb 2019 04:22:35 -0800 (PST) X-Google-Smtp-Source: AHgI3IZ6cHBbWPAfjdl0Fo94IKqSt8wsFUnvVIJU8YKyKGIXo2vKOKx48i18moVtxdVZ6au2bUfA X-Received: by 2002:a62:b40b:: with SMTP id h11mr7086528pfn.108.1551356555733; Thu, 28 Feb 2019 04:22:35 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1551356555; cv=none; d=google.com; s=arc-20160816; b=EkKb8lBBcuhwEYOPe+TwPauwe7eRaYrT0r9/GEBL/3JYieHOyGz2YTzMkmmz216rg9 n64/V1HCvR8kwbhOi++w7MH1s0HdggIXoCIL/3jw2PPiR3TuDJIScVFI8c+T0mNQCRYM 8OJRow3yq155eWqZCeZ2y3b3U4/kCeVXa7VBupBD7c43DOKxBB3SAq91eaNunw1nMOzD g7cx20hrjfUCSKM6Gt7rduDvPX1PsvnaYFNfciA0wzr/NbPqwHZft0IBOdkr8ga34emT lUjeYS3DQehE+CICQfXu/cyNgV7E/eSRO7AI20JwhwhEuL2LhXuuqjwluU90BpiRKXm9 zqkQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:mime-version:content-transfer-encoding :content-language:accept-language:in-reply-to:references:message-id :date:thread-index:thread-topic:subject:cc:to:from; bh=6ha6vB/MQJIzqWJtL2kuKgVc80NRognuTvKaOo1fgL0=; b=Zkp5Wk8nG2Y7Nw+WuK1N1iebrEnckw1Wd/nZs5ZWjHniLXBnsLusbliJ3RxIreFUrC nYU3egmPipX/LybCjplf67Bdqsw9BYN6kQGpXBfxxQpPt/bsk8V1iKozxgAcHHz9RJYs wS4vijl0OV2/zXCyuNf1eH9yxNMXOB1XPxkumE+uIGAOHqVbtppocvqVzyZdE6Tpixj2 BFcDcvBifkqsUJyL12n+q8/rOLl2NCUzzopqPTOJQpxys2R8LdpkN4IAVQGLoG7FIrq2 h0lAnQindIRqxVo44hcqId7q6IQHoI3135/c247eOuG9nez2LUzYhMvpsvVJ5/Jimx3V vrcw== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id v20si17942529pgb.207.2019.02.28.04.22.20; Thu, 28 Feb 2019 04:22:35 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731337AbfB1LuB (ORCPT + 99 others); Thu, 28 Feb 2019 06:50:01 -0500 Received: from smtp.eu.citrix.com ([185.25.65.24]:57271 "EHLO SMTP.EU.CITRIX.COM" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725896AbfB1LuA (ORCPT ); Thu, 28 Feb 2019 06:50:00 -0500 X-IronPort-AV: E=Sophos;i="5.58,423,1544486400"; d="scan'208";a="86583885" From: Paul Durrant To: Igor Druzhinin , Wei Liu CC: "xen-devel@lists.xenproject.org" , "netdev@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "davem@davemloft.net" Subject: RE: [PATCH] xen-netback: fix occasional leak of grant ref mappings under memory pressure Thread-Topic: [PATCH] xen-netback: fix occasional leak of grant ref mappings under memory pressure Thread-Index: AQHUzwnalyGnLUhGt0OYo7x3WDkwmKX09AIQgAAHGACAABYNsP//9bsAgAAR2wA= Date: Thu, 28 Feb 2019 11:49:15 +0000 Message-ID: <271c9beb91a74ded8e62d1cfc540976c@AMSPEX02CL02.citrite.net> References: <1551319382-32595-1-git-send-email-igor.druzhinin@citrix.com> <8424fba34a1f43908a6dae3a9308863b@AMSPEX02CL02.citrite.net> <20190228110136.somjads2f5ivqhju@zion.uk.xensource.com> <447cd231-3ea4-e56d-29b0-6528804c9e9a@citrix.com> In-Reply-To: <447cd231-3ea4-e56d-29b0-6528804c9e9a@citrix.com> Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org PiAtLS0tLU9yaWdpbmFsIE1lc3NhZ2UtLS0tLQ0KPiBGcm9tOiBJZ29yIERydXpoaW5pbiBbbWFp bHRvOmlnb3IuZHJ1emhpbmluQGNpdHJpeC5jb21dDQo+IFNlbnQ6IDI4IEZlYnJ1YXJ5IDIwMTkg MTE6NDQNCj4gVG86IFBhdWwgRHVycmFudCA8UGF1bC5EdXJyYW50QGNpdHJpeC5jb20+OyBXZWkg TGl1IDx3ZWkubGl1MkBjaXRyaXguY29tPg0KPiBDYzogeGVuLWRldmVsQGxpc3RzLnhlbnByb2pl Y3Qub3JnOyBuZXRkZXZAdmdlci5rZXJuZWwub3JnOyBsaW51eC1rZXJuZWxAdmdlci5rZXJuZWwu b3JnOw0KPiBkYXZlbUBkYXZlbWxvZnQubmV0DQo+IFN1YmplY3Q6IFJlOiBbUEFUQ0hdIHhlbi1u ZXRiYWNrOiBmaXggb2NjYXNpb25hbCBsZWFrIG9mIGdyYW50IHJlZiBtYXBwaW5ncyB1bmRlciBt ZW1vcnkgcHJlc3N1cmUNCj4gDQo+IE9uIDI4LzAyLzIwMTkgMTE6MjEsIFBhdWwgRHVycmFudCB3 cm90ZToNCj4gPj4+IEBAIC0xMTUzLDYgKzExNTIsMTAgQEAgc3RhdGljIGludCB4ZW52aWZfdHhf c3VibWl0KHN0cnVjdCB4ZW52aWZfcXVldWUgKnF1ZXVlKQ0KPiA+Pj4gICAgICAgICAgICAgICAg ICAgICAgICAgICAgICAgICBrZnJlZV9za2Ioc2tiKTsNCj4gPj4+ICAgICAgICAgICAgICAgICAg ICAgICAgICAgICAgICAgY29udGludWU7DQo+ID4+PiAgICAgICAgICAgICAgICAgICAgICAgICB9 DQo+ID4+PiArDQo+ID4+PiArICAgICAgICAgICAgICAgICAgICAgICAvKiBDb3BpZWQgYWxsIHRo ZSBiaXRzIGZyb20gdGhlIGZyYWcgbGlzdC4gKi8NCj4gPj4+ICsgICAgICAgICAgICAgICAgICAg ICAgIHNrYl9mcmFnX2xpc3RfaW5pdChza2IpOw0KPiA+Pj4gKyAgICAgICAgICAgICAgICAgICAg ICAga2ZyZWUobnNrYik7DQo+ID4+DQo+ID4+IEkgdGhpbmsgeW91IHdhbnQga2ZyZWVfc2tiIGhl cmU/DQo+ID4NCj4gPiBOby4gbnNrYiBpcyB0aGUgZnJhZyBsaXN0Li4uIGl0IGlzIHVubGlua2Vk IGZyb20gc2tiIGJ5IHRoZSBjYWxsIHRvIHNrYl9mcmFnX2xpc3RfaW5pdCgpIGFuZCB0aGVuIGl0 DQo+IGNhbiBiZSBmcmVlZCBvbiBpdHMgb3duLiBUaGUgc2tiIGlzIHdoYXQgd2UgbmVlZCB0byBy ZXRhaW4sIGJlY2F1c2UgdGhhdCBub3cgY29udGFpbnMgYWxsIHRoZSBkYXRhLg0KPiA+DQo+IA0K PiBBcmUgeW91IHNheWluZyBwcmV2aW91cyBjb2RlIGluIHhlbnZpZl9oYW5kbGVfZnJhZ19saXN0 KCkgaW5jb3JyZWN0bHkNCj4gY2FsbGVkIGtmcmVlX3NrYigpPw0KDQpObywgaXQgY29ycmVjdGx5 IGNhbGxlZCBrZnJlZV9za2IoKSBvbiBuc2tiIGluIHRoZSBzdWNjZXNzIGNhc2UuIFdoYXQgV2Vp IGFuZCBteXNlbGYgd291bGQgcHJlZmVyIGlzIHRoYXQgd2UgaGF2ZSBhIHNpbmdsZSBwbGFjZSB0 aGF0IHRoZSBmcmFnIGxpc3QgaXMgZnJlZWQgaW4gYm90aCB0aGUgc3VjY2VzcyBhbmQgZXJyb3Ig Y2FzZXMuDQoNCiAgUGF1bA0KDQo+IA0KPiBJZ29yDQo=