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=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 1A8E6C2D0A3 for ; Thu, 29 Oct 2020 23:20:03 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 7CEB02076E for ; Thu, 29 Oct 2020 23:20:02 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="AKe8sacI"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=intel.onmicrosoft.com header.i=@intel.onmicrosoft.com header.b="GkUuVOQ3" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7CEB02076E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:Content-ID:In-Reply-To:References: Message-ID:Date:Subject:To:From:Reply-To:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=bP//HpcrW2uTFQyhRCWhGQQplgjQbDjtMd3k8amO7w0=; b=AKe8sacIUbEyRM9LaQ8SddUiP Bg+ne4u/cTnJ/J7BKDVcU/9DJC7Gd2x+1rQAPlgnXt+cpEO9bXBQSlbJBm46/0BH9Q4CWewjc17iL 121qZVnQ3tWqcL4VYwFj6nVZ0U1t2JQWyHlSUYfZPdAsBxCxBQqtMyeJsE7BccohwsgQ25tsrSoZq 7Tx0qygxX2thxwowB55sF4x7SxaR5IQFTuRJY5bTrNvqLvNc3Q8DFbzsBNzdOhLme5+LfPkF/mYK4 nr+lTzzQpNRaISbtfdwP3ERLR4bJxCb+o+YATBZBspbv4ycgTngbOb8Ab6aBqz+BQITYaOpX+6Kw0 XFXH3DBkA==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kYHCx-0005zO-CO; Thu, 29 Oct 2020 23:19:51 +0000 Received: from mga04.intel.com ([192.55.52.120]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kYHCu-0005xd-TC; Thu, 29 Oct 2020 23:19:50 +0000 IronPort-SDR: rDbm/VGU3BwcRDKQrro+9fWEW30zwp9hD0StKchtiWTCCIjhiwpWAU7uqUEiuPj+nnx2udv+iU gh4Oj2R/W7bg== X-IronPort-AV: E=McAfee;i="6000,8403,9789"; a="165943628" X-IronPort-AV: E=Sophos;i="5.77,431,1596524400"; d="scan'208";a="165943628" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Oct 2020 16:19:47 -0700 IronPort-SDR: D4G3AykV9+EjYWZ+eBTCelU68pXmX3Imr666vTOed1NPp2IoUNJN+Q54a0RrucK9LQ3UMwb+qA UQwp0UDCXxCg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.77,431,1596524400"; d="scan'208";a="361665330" Received: from fmsmsx606.amr.corp.intel.com ([10.18.126.86]) by FMSMGA003.fm.intel.com with ESMTP; 29 Oct 2020 16:19:46 -0700 Received: from fmsmsx603.amr.corp.intel.com (10.18.126.83) 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; Thu, 29 Oct 2020 16:19:46 -0700 Received: from fmsedg601.ED.cps.intel.com (10.1.192.135) by fmsmsx603.amr.corp.intel.com (10.18.126.83) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1713.5 via Frontend Transport; Thu, 29 Oct 2020 16:19:46 -0700 Received: from NAM12-MW2-obe.outbound.protection.outlook.com (104.47.66.44) by edgegateway.intel.com (192.55.55.70) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.1713.5; Thu, 29 Oct 2020 16:19:46 -0700 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=P+gMr3M3X/7LaUKGHr9SoZfV0LvqAV6J/fkohpMyLWHk1M9f8PFB68EKla6YyhTTFTDqXOQsybOMjap5tpVZj2obHPUZt58Xge89S1rUhJj7ua260aSlcSN8iMlBgwmVkWL04VWMezAEhVZVp506NPhRBCrCcekACmkV2DcJlbsr9KWtW5CBXzs1AfI9gwWGQ7IMNwn4vG3vjqzQZ82Z+7TePEOKqq2S3P+6cTy3FLKsxc1Wlzc3KJHeJrlbWvLROYQhjq288BS4Z3yn+ulovTYksxNNArfKDFZy94P2S5anWkViIi/dw8DB42xA5mieZLy29wCx8F9niSjDoy5LXA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=jO7AP/YWx4yE/ZTLqLUmiveJg6xTIWuAOwHJzfq/m4k=; b=SDvfwC4WYCuYWuD9QpSqfzopxd9XP5SonRMoUxpoZKRwPq/mqbjQrYif/gpGTa3MQkfjxW/Ks3jIJkTpJemnARgws7Mxh/6Awk1z8MZ5ZcDSuthHGeF7zdCeBFPNRYadsL7P0ddGGKOY7WAnVTZM9Xj5ymc1EisNDE3/MLVJc+rJgQ8Gnlqpp5Sis0SO7sjd5bf5I+vnXWldslFQLXoGPylQqBe11T/DD/uXqJd1cCjjSDRP53+wfYm3R1kCivgpzxUfCNaHzKN/JZYuizArgHJmL3E/FMbKgvFylMOnJ0kLeRTUH+w420BumK60mgpvCzIY+JjrDNyOsLZcp4Cvtg== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=intel.com; dmarc=pass action=none header.from=intel.com; dkim=pass header.d=intel.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=intel.onmicrosoft.com; s=selector2-intel-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=jO7AP/YWx4yE/ZTLqLUmiveJg6xTIWuAOwHJzfq/m4k=; b=GkUuVOQ34PnV4LHx1XpHjKNV26OwBWeg/YYEp/L5DYWYkHkPrTCHwQDOq4VYTDWvBwLdWEGOzSlLmvO4A9txeCsCo5LBNe3FATNLa09P25I6MkejWL8xw5DZLvuJRN+FmG/tKYZCPrE8qBcV+qAHdij8yOARtY/iLhZkrwsQu4k= Received: from SN6PR11MB3184.namprd11.prod.outlook.com (2603:10b6:805:bd::17) by SA2PR11MB5082.namprd11.prod.outlook.com (2603:10b6:806:115::5) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3499.19; Thu, 29 Oct 2020 23:19:45 +0000 Received: from SN6PR11MB3184.namprd11.prod.outlook.com ([fe80::b901:8e07:4340:6704]) by SN6PR11MB3184.namprd11.prod.outlook.com ([fe80::b901:8e07:4340:6704%7]) with mapi id 15.20.3477.028; Thu, 29 Oct 2020 23:19:45 +0000 From: "Edgecombe, Rick P" To: "will@kernel.org" , "rppt@kernel.org" Subject: Re: [PATCH 0/4] arch, mm: improve robustness of direct map manipulation Thread-Topic: [PATCH 0/4] arch, mm: improve robustness of direct map manipulation Thread-Index: AQHWqrf3SYgZeORHqEa1kMKSitw9UKmpFReAgACDwgCAAJbiAIAA89wAgAG/kwCAAAMDgIAAn/WAgAC65YCAAP2BAA== Date: Thu, 29 Oct 2020 23:19:45 +0000 Message-ID: References: <20201025101555.3057-1-rppt@kernel.org> <20201026090526.GA1154158@kernel.org> <20201027083816.GG1154158@kernel.org> <20201028112011.GB27927@willie-the-truck> <20201028113059.GG1428094@kernel.org> <9e77d0a939eda3029d6ae89bd14d7f1465b0559d.camel@intel.com> <20201029081225.GK1428094@kernel.org> In-Reply-To: <20201029081225.GK1428094@kernel.org> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Evolution 3.30.1 (3.30.1-1.fc29) authentication-results: kernel.org; dkim=none (message not signed) header.d=none;kernel.org; dmarc=none action=none header.from=intel.com; x-originating-ip: [192.55.54.40] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 6f65f7f7-55f0-4d82-05d6-08d87c611f80 x-ms-traffictypediagnostic: SA2PR11MB5082: x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:10000; x-ms-exchange-senderadcheck: 1 x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: qymfxompgOrWzlro/sMPTGY9YJVX1DwlGdD/d46SzbnToKutCQB8Eh+wpcTKgI5jqZnCFiFujFALoc3TsOGx6J6+TSTsmwZjVH+hdYNEavYMOiefPyFSpP3tmYgvUGmWWdEt+cS4pZflGu4Z3Yb4pnanhJAZchYgVEKgPsR1baMpxCOMglQOhh0esOlWs/Uhg4FJ2f4y52Nrk4V9stKWnqp1bhG04M4pwPKC0IlJlU0yi5U0algzd2zV6PuvgFXwvqDlI8ykLre5FV0h14pnneEhR6aXut60IQ0u1B/NupQqFmxqdhppKM3r7jdQsdRc72SDvc+Oa7cM21PSR1cCxg== x-forefront-antispam-report: CIP:255.255.255.255; CTRY:; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:SN6PR11MB3184.namprd11.prod.outlook.com; PTR:; CAT:NONE; SFS:(4636009)(346002)(366004)(39860400002)(376002)(396003)(136003)(66556008)(66476007)(64756008)(4326008)(4001150100001)(36756003)(86362001)(2616005)(26005)(5660300002)(8676002)(316002)(66446008)(110136005)(76116006)(6506007)(91956017)(186003)(71200400001)(6486002)(478600001)(7416002)(4744005)(8936002)(7406005)(2906002)(66946007)(6512007)(54906003); DIR:OUT; SFP:1102; x-ms-exchange-antispam-messagedata: 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 Content-ID: MIME-Version: 1.0 X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: SN6PR11MB3184.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 6f65f7f7-55f0-4d82-05d6-08d87c611f80 X-MS-Exchange-CrossTenant-originalarrivaltime: 29 Oct 2020 23:19:45.4071 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: +RcybrvbdhfunvXnqzm9lKtFLhZ9fAWekAHNXbChfa/6Xd/oGhaT1uEOVEObC861XIEEZsuH/OpGoKidyGhe+V9iidyz2SzuQeVKEkgCaLg= X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA2PR11MB5082 X-OriginatorOrg: intel.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201029_191949_122850_BDAD030B X-CRM114-Status: GOOD ( 18.47 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "benh@kernel.crashing.org" , "david@redhat.com" , "peterz@infradead.org" , "catalin.marinas@arm.com" , "dave.hansen@linux.intel.com" , "linux-mm@kvack.org" , "paulus@samba.org" , "pavel@ucw.cz" , "hpa@zytor.com" , "sparclinux@vger.kernel.org" , "cl@linux.com" , "linux-riscv@lists.infradead.org" , "linux-s390@vger.kernel.org" , "mpe@ellerman.id.au" , "x86@kernel.org" , "rppt@linux.ibm.com" , "borntraeger@de.ibm.com" , "mingo@redhat.com" , "rientjes@google.com" , "Brown, Len" , "aou@eecs.berkeley.edu" , "gor@linux.ibm.com" , "linux-pm@vger.kernel.org" , "hca@linux.ibm.com" , "bp@alien8.de" , "luto@kernel.org" , "paul.walmsley@sifive.com" , "kirill@shutemov.name" , "tglx@linutronix.de" , "iamjoonsoo.kim@lge.com" , "linux-arm-kernel@lists.infradead.org" , "rjw@rjwysocki.net" , "linux-kernel@vger.kernel.org" , "penberg@kernel.org" , "palmer@dabbelt.com" , "akpm@linux-foundation.org" , "linuxppc-dev@lists.ozlabs.org" , "davem@davemloft.net" Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org On Thu, 2020-10-29 at 10:12 +0200, Mike Rapoport wrote: > This series goal was primarily to separate dependincies and make it > clearer what DEBUG_PAGEALLOC and what SET_DIRECT_MAP are. As it > turned > out, there is also some lack of consistency between architectures > that > implement either of this so I tried to improve this as well. > > Honestly, I don't know if a thread can be paused at the time > __vunmap() > left invalid pages, but it could, there is an issue on arm64 with > DEBUG_PAGEALLOC=n and this set fixes it. Ah, ok. So from this and the other thread, this is about the logic in arm's cpa for when it will try the un/map operations. I think the logic actually works currently. And this series introduces a problem on ARM similar to the one you are saying preexists. I put the details in the other thread. _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv