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=-2.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_PASS,URIBL_BLOCKED autolearn=ham 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 50CE6C43441 for ; Wed, 21 Nov 2018 14:31:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0C0A021479 for ; Wed, 21 Nov 2018 14:31:43 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="Wjzk0UsN" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0C0A021479 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=oracle.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730780AbeKVBGU (ORCPT ); Wed, 21 Nov 2018 20:06:20 -0500 Received: from userp2130.oracle.com ([156.151.31.86]:44406 "EHLO userp2130.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728283AbeKVBGU (ORCPT ); Wed, 21 Nov 2018 20:06:20 -0500 Received: from pps.filterd (userp2130.oracle.com [127.0.0.1]) by userp2130.oracle.com (8.16.0.22/8.16.0.22) with SMTP id wALEEWWl073172; Wed, 21 Nov 2018 14:29:50 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=content-type : mime-version : subject : from : in-reply-to : date : cc : content-transfer-encoding : message-id : references : to; s=corp-2018-07-02; bh=xy7MccKEKYg95kZohZdiR5wZbdk+kdGHER5W08Ahjyo=; b=Wjzk0UsN6BBqHy6tkEukt8nv9s4YXXHv+7rOwjkA6frDw0BZkl5IdaLTGd2nXpBxXoab 4XKjZWO6PXOmB69z+hwoc4SEIYq/fTUWOLuduAMXn8SK2O8MVYqDoUZMfFa/J3K+TOFg Ys0BZMNPQp+y4M69qSwl/srpzcWqDyEjk5iJHKK9SyJHnBAC3yps+cfM4x6myDc+HbFB FCUNLDCXon8N1iOC00hdncX4zbSRiS/Mn444IqRI14X7fhzbHJ4M71i9Ag3jHR633Z10 MpZi7NipZunChCjIeIWuB0Gq16abZggbMJFG1YWlzVvx/I6hhEPoEGKHc001POwVgNUQ Bg== Received: from userv0022.oracle.com (userv0022.oracle.com [156.151.31.74]) by userp2130.oracle.com with ESMTP id 2ntadu1uyf-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 21 Nov 2018 14:29:50 +0000 Received: from userv0121.oracle.com (userv0121.oracle.com [156.151.31.72]) by userv0022.oracle.com (8.14.4/8.14.4) with ESMTP id wALETnn3003104 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 21 Nov 2018 14:29:49 GMT Received: from abhmp0017.oracle.com (abhmp0017.oracle.com [141.146.116.23]) by userv0121.oracle.com (8.14.4/8.13.8) with ESMTP id wALETeA7027352; Wed, 21 Nov 2018 14:29:40 GMT Received: from [192.168.0.110] (/73.243.10.6) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Wed, 21 Nov 2018 06:29:39 -0800 Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 12.2 \(3445.102.3\)) Subject: Re: [PATCH 1/9] mm: Introduce new vm_insert_range API From: William Kucharski In-Reply-To: <20181121123513.GF3065@bombadil.infradead.org> Date: Wed, 21 Nov 2018 07:29:37 -0700 Cc: Souptick Joarder , rppt@linux.ibm.com, Andrew Morton , Michal Hocko , "Kirill A. Shutemov" , vbabka@suse.cz, Rik van Riel , Stephen Rothwell , rppt@linux.vnet.ibm.com, Peter Zijlstra , Russell King - ARM Linux , robin.murphy@arm.com, iamjoonsoo.kim@lge.com, treding@nvidia.com, Kees Cook , Marek Szyprowski , stefanr@s5r6.in-berlin.de, hjc@rock-chips.com, Heiko Stuebner , airlied@linux.ie, oleksandr_andrushchenko@epam.com, joro@8bytes.org, pawel@osciak.com, Kyungmin Park , mchehab@kernel.org, Boris Ostrovsky , Juergen Gross , linux-kernel@vger.kernel.org, Linux-MM , linux-arm-kernel@lists.infradead.org, linux1394-devel@lists.sourceforge.net, dri-devel@lists.freedesktop.org, linux-rockchip@lists.infradead.org, xen-devel@lists.xen.org, iommu@lists.linux-foundation.org, linux-media@vger.kernel.org Content-Transfer-Encoding: quoted-printable Message-Id: References: <20181115154530.GA27872@jordon-HP-15-Notebook-PC> <20181116182836.GB17088@rapoport-lnx> <20181117143742.GB7861@bombadil.infradead.org> <833B5050-DEF6-44A0-9832-276F86671212@oracle.com> <20181121123513.GF3065@bombadil.infradead.org> To: Matthew Wilcox X-Mailer: Apple Mail (2.3445.102.3) X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=9083 signatures=668683 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=618 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1811210126 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > On Nov 21, 2018, at 5:35 AM, Matthew Wilcox = wrote: >=20 > It's probably better to be more explicit and answer Randy's question: >=20 > * If we fail to insert any page into the vma, the function will return > * immediately leaving any previously-inserted pages present. Callers > * from the mmap handler may immediately return the error as their > * caller will destroy the vma, removing any successfully-inserted = pages. > * Other callers should make their own arrangements for calling = unmap_region(). That works for me as well.