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Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by DM6NAM11FT016.mail.protection.outlook.com (10.13.173.139) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.5273.14 via Frontend Transport; Tue, 24 May 2022 19:07:24 +0000 Received: from alex-MS-7B09.amd.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Tue, 24 May 2022 14:07:19 -0500 From: Alex Sierra To: CC: , , , , , , , , , , , , Subject: [PATCH v3 04/13] mm: remove the vma check in migrate_vma_setup() Date: Tue, 24 May 2022 14:06:23 -0500 Message-ID: <20220524190632.3304-5-alex.sierra@amd.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220524190632.3304-1-alex.sierra@amd.com> References: <20220524190632.3304-1-alex.sierra@amd.com> MIME-Version: 1.0 X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: a91ef5cc-edff-4f91-06c2-08da3db8a32e X-MS-TrafficTypeDiagnostic: CH0PR12MB5026:EE_ X-Microsoft-Antispam-PRVS: X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 24 May 2022 19:07:24.6232 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: a91ef5cc-edff-4f91-06c2-08da3db8a32e X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: DM6NAM11FT016.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH0PR12MB5026 Authentication-Results: imf20.hostedemail.com; dkim=pass header.d=amd.com header.s=selector1 header.b=UWZRWqxG; spf=pass (imf20.hostedemail.com: domain of Alex.Sierra@amd.com designates 40.107.236.73 as permitted sender) smtp.mailfrom=Alex.Sierra@amd.com; dmarc=pass (policy=quarantine) header.from=amd.com X-Rspam-User: X-Stat-Signature: csq743bo7r7ngj3r5xdrhjiqapagfkab X-Rspamd-Queue-Id: E2B4E1C003C X-Rspamd-Server: rspam01 X-HE-Tag: 1653419231-727793 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: From: Alistair Popple migrate_vma_setup() checks that a valid vma is passed so that the page tables can be walked to find the pfns associated with a given address range. However in some cases the pfns are already known, such as when migrating device coherent pages during pin_user_pages() meaning a valid vma isn't required. Signed-off-by: Alistair Popple Acked-by: Felix Kuehling Signed-off-by: Christoph Hellwig --- mm/migrate_device.c | 34 +++++++++++++++++----------------- 1 file changed, 17 insertions(+), 17 deletions(-) diff --git a/mm/migrate_device.c b/mm/migrate_device.c index a0b997935cf9..b399c498f0aa 100644 --- a/mm/migrate_device.c +++ b/mm/migrate_device.c @@ -467,24 +467,24 @@ int migrate_vma_setup(struct migrate_vma *args) args->start &= PAGE_MASK; args->end &= PAGE_MASK; - if (!args->vma || is_vm_hugetlb_page(args->vma) || - (args->vma->vm_flags & VM_SPECIAL) || vma_is_dax(args->vma)) - return -EINVAL; - if (nr_pages <= 0) - return -EINVAL; - if (args->start < args->vma->vm_start || - args->start >= args->vma->vm_end) - return -EINVAL; - if (args->end <= args->vma->vm_start || args->end > args->vma->vm_end) - return -EINVAL; if (!args->src || !args->dst) return -EINVAL; - - memset(args->src, 0, sizeof(*args->src) * nr_pages); - args->cpages = 0; - args->npages = 0; - - migrate_vma_collect(args); + if (args->vma) { + if (is_vm_hugetlb_page(args->vma) || + (args->vma->vm_flags & VM_SPECIAL) || vma_is_dax(args->vma)) + return -EINVAL; + if (args->start < args->vma->vm_start || + args->start >= args->vma->vm_end) + return -EINVAL; + if (args->end <= args->vma->vm_start || + args->end > args->vma->vm_end) + return -EINVAL; + memset(args->src, 0, sizeof(*args->src) * nr_pages); + args->cpages = 0; + args->npages = 0; + + migrate_vma_collect(args); + } if (args->cpages) migrate_vma_unmap(args); @@ -666,7 +666,7 @@ void migrate_vma_pages(struct migrate_vma *migrate) continue; } - if (!page) { + if (!page && migrate->vma) { if (!(migrate->src[i] & MIGRATE_PFN_MIGRATE)) continue; if (!notified) {