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Ts'o" Cc: akpm@linux-foundation.org, linux-mm@kvack.org, rcampbell@nvidia.com, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, hch@lst.de, jgg@nvidia.com, jglisse@redhat.com References: <20210617151705.15367-1-alex.sierra@amd.com> <905418d1-9099-0ea8-a6e6-84cc8ef3d0b0@amd.com> From: "Sierra Guiza, Alejandro (Alex)" Message-ID: <601418f5-c526-08e9-b071-4533a32ce25d@amd.com> Date: Sat, 17 Jul 2021 14:54:06 -0500 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.12.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US X-ClientProxiedBy: SN6PR05CA0030.namprd05.prod.outlook.com (2603:10b6:805:de::43) To SA0PR12MB4430.namprd12.prod.outlook.com (2603:10b6:806:70::20) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from [172.31.9.47] (165.204.77.11) by SN6PR05CA0030.namprd05.prod.outlook.com (2603:10b6:805:de::43) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4352.8 via Frontend Transport; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?B?ZDR1TDFLNkdxSVh2TDBCK3R5NWRNWW4xbjFXZ0J1SGtwL0VOdStBMXhhb09w?= =?utf-8?B?RUMrTHpONC93enlzMkh1QWZGb1F0aGVSTE1zait0SmxYK0F6eDBMeG1WZ28r?= =?utf-8?B?WlU3YWk0OFlhRVpWcHBWZ2tmbGpYOUtqSEVxRGNPN0w3clVTWXZHZ0hzTkQ4?= =?utf-8?B?WE4yK1I0WWdXUGU4cmFSZkpPUEZFSmltRFFFN1loRlFLWlBBeDRyb296alIv?= =?utf-8?B?NnN6emhpemxONWFub0NycE81VFg4bndxN1Y0WVROT2NEaHNnRVROdHpOckg1?= =?utf-8?B?V0c3WEJtcGtoNitXd0d0VENFOEdyMnRkTlI3Znc5VWlacHNzTXE3SzF5L01a?= =?utf-8?B?M1JlWEJFUGdpMGVUck4zSEgwMTFlSTNpZXdrTFpyM1JabUVoWkRodkdmMEtZ?= =?utf-8?B?UlZ1Skp4Ry83VngwUlVQamZZYnhKdzhXSWhINXFRVEtzYTBrOFlMd0FkNm5t?= =?utf-8?B?TDRySmljV1I5WXh5MzdpMGhlTStKNk1mV3E0a0tRMjNFaUdQczFYaVBSN2NI?= =?utf-8?B?cndFM1A0NWUyYUpiZHhFeU1PcVM3UEw0UHQvNjBUOWJEVUpTN3dYNnhQay9N?= =?utf-8?B?VGtpMXJFaE5Vci9RbU0yNWtJQmJwejRNanFsNWthRlVZQjVGVGFxY0owbUhQ?= =?utf-8?B?MThLcDlhZUEvSDhwSzBKM3cyeHBrcHI3MjE1MjBhdnV4OVlDenlWVFJTMDRD?= =?utf-8?B?VUZHL1hyUExWZURhYlFVUk83RVlhZ29sVzVKZjhhRUwwUXl6bHg4bWt1VU8z?= =?utf-8?B?UmM3NUtMQUlqcDF3ZUlNWlUybStiMVl5c2ZNc2hMeWp5eGw5SlgyWnBMWllC?= =?utf-8?B?bFAyNitWN0tGbFpRcGdtU3RJOExEMHlycGh4STFVOHptM0NndzlyQkRYaFlQ?= =?utf-8?B?Z29YVkhPUlJIQm5kNVBTQ0xBaWtNT3ZxVSsyU0RoMTdiL21LMkRDOW54akdo?= =?utf-8?B?OWhWUlBWbkYxdkxjSHk0NlAyMVFJd3hTMlU0ZW5NMWd4Y3ppSEdoTGFEK0Jo?= =?utf-8?B?aXJTeDJvUzk5LzdxUksySGI2Q3c1UDk4bHVaQmErZVNxd3JvUHFRMFVST21l?= =?utf-8?B?K0RXK0RuSS9EV05RQVhOb3NGbTB0ck5jSnE0c1hnUlV4aGFGRTV4WmxXcW5K?= =?utf-8?B?clEwZi9aR2tENFV4OVNqQ3Q4WVNXOGFWRmRZRTVjOWo3WEp5UDJlbXJkYXJX?= =?utf-8?B?RDNPa1ltenpZV2FRbmpPVWpGcnhJV0FUT3V5dGlibUVaWEtoS2lZemNVSTNy?= =?utf-8?B?L04zRjB4Nk9DcEZBY0R4R214ZkI1K3g4cUp3Zk50dlNHUW9ML05iMmlLMENE?= =?utf-8?B?N3JYOWhhUmR6WEdERVdZckFneE0zdlJ2ZEt3MUtoQVZFL09QSjFZM3RPN0Jk?= =?utf-8?B?ZmxYd01mcGR6MVNURXB3a2lucmJrclF3RjhDeVIrN1oyYnVtRFlDQkVIaExZ?= =?utf-8?B?VVlCWXNubE83TGVLaFk0aktHOCtQaFM2bkxFM2FUcjlKQVFNYmRsTFhBTUFo?= =?utf-8?B?ZlVVdTZNMzFqZU9Ya0w0VTh6T1UxVDVON29US0lxZHpWQk5HNDk4ZExHWEtK?= =?utf-8?B?S25OMzFQd3F0ZEZiN2NnZjN4ZndPSkVxcWhVOUUvd2NyRkFFS21LZk5XK1NL?= =?utf-8?B?QWg0ZDc3Q1Faa25yc2ZMWlBkL05Cbk9mWG9NczBCYkpHYVpBRWxBeXp4YmhC?= =?utf-8?B?bnRUbDlZSmtGaCtoNlRTTjM5ZDRldjNubVQ2UFpsREUvVVBIZGlZb010U0Fh?= =?utf-8?Q?2eJf6J4Lfe15rkyFp/8eGGTmAK6iOEUZB4XtdiD?= X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-Network-Message-Id: 190f1b0f-1a23-430b-48b2-08d9495cab82 X-MS-Exchange-CrossTenant-AuthSource: SA0PR12MB4430.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 17 Jul 2021 19:54:21.5903 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 72VxJbcyvqC9DWQNTwAK4OYOYSuvrtnohC/gn3vUnRMxB7HSj7TP4OxVFBKIfq5cJOEzZnsT1wRuEnpaI/na8Q== X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA0PR12MB4446 Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org On 7/16/2021 5:14 PM, Felix Kuehling wrote: > Am 2021-07-16 um 11:07 a.m. schrieb Theodore Y. Ts'o: >> On Wed, Jun 23, 2021 at 05:49:55PM -0400, Felix Kuehling wrote: >>> I can think of two ways to test the changes for MEMORY_DEVICE_GENERIC in >>> this patch series in a way that is reproducible without special hardware and >>> firmware: >>> >>> For the reference counting changes we could use the dax driver with hmem and >>> use efi_fake_mem on the kernel command line to create some DEVICE_GENERIC >>> pages. I'm open to suggestions for good user mode tests to exercise dax >>> functionality on this type of memory. >> Sorry for the thread necromancy, but now that the merge window is >> past.... > No worries. Alejandro should have a new version of this series in a few > days, with updates to hmm_test and some fixes. V4 patch series have been sent for review. https://marc.info/?l=dri-devel&m=162654971618911&w=2 Regards, Alex Sierra > > >> Today I test ext4's dax support, without having any $$$ DAX hardware, >> by using the kernel command line "memmap=4G!9G:memmap=9G!14G" which >> reserves memory so that creates two pmem device and then I run >> xfstests with DAX enabled using qemu or using a Google Compute Engine >> VM, using TEST_DEV=/dev/pmem0 and SCRATCH_DEV=/dev/pmem1. >> >> If you can give me a recipe for what kernel configs I should enable, >> and what magic kernel command line arguments to use, then I'd be able >> to test your patch set with ext4. > That would be great! > > Regarding kernel config options, it should be the same as what you're > using for DAX testing today. We're not changing or adding any Kconfig > options. But let me take a stab: > > ZONE_DEVICE > HMM_MIRROR > MMU_NOTIFIER > DEVICE_PRIVATE (maybe not needed for your test) > FS_DAX > > I'm not sure what you're looking for in terms of kernel command line, > other than the memmap options you already found. There are some more > options to run hmm_test with fake SPM (DEVICE_GENERIC) memory, but we're > already running that ourselves. That will also be in the next revision > of this patch series. In order to run hmm test with generic device type enabled, set the following: kernel config: EFI_FAKE_MEMMAP RUNTIME_TESTING_MENU TEST_HMM=m Kernel parameters to fake SP memory. The addresses set here are based on my system's usable memory enumerated by BIOS-e820 at boot. The test requires two SP devices of at least 256MB. efi_fake_mem=1G@0x100000000:0x40000,1G@0x140000000:0x40000 To run the hmm_test in generic device type pass the SP addresses to the sh script. sudo ./test_hmm.sh smoke 0x100000000 0x140000000 > > If you can run your xfstests with DAX on top of this patch series, that > would be very helpful. That's to make sure the ZONE_DEVICE page refcount > changes don't break DAX. > > Regards, >   Felix > > >> Cheers, >> >> - Ted 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=-7.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MSGID_FROM_MTA_HEADER,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 6B39CC636CB for ; Sat, 17 Jul 2021 19:54:29 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 3800961159 for ; Sat, 17 Jul 2021 19:54:29 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3800961159 Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=amd.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id A84CC6EAAC; Sat, 17 Jul 2021 19:54:28 +0000 (UTC) Received: from NAM10-DM6-obe.outbound.protection.outlook.com (mail-dm6nam10on2044.outbound.protection.outlook.com [40.107.93.44]) by gabe.freedesktop.org (Postfix) with ESMTPS id 81F4B6EAAC; Sat, 17 Jul 2021 19:54:27 +0000 (UTC) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=HbrR4fruOy4X/FDhIKQENGvnRdXvVoPqY1HMBdH2RYCTbNTOQ8OeZ8aqJ0cnwfAJcaCtacZ/PEknUWrZeUjdKvO3gcRW/oOiirya49knyRZQDcFc5bpkqK9dZWTQVyE1TtU7ie79wXfANZM/fTP2CmSmd9npUp/a04SEH6NV0cXDpgvcDSDd8Tsyereq/Kis8iBCw1sNqFCyvh3MfdPAwq6uTZBTyI0SsyRKCoRbVqLjkyOvMWMbl+ZtpvvMOydCV7jrbmxWOmTAxrlTHpHSSW28xFEUBiavKTWNpa6pRmKZWMQDBHIVvCKgNO/RPejNia3uPsCDDuJf1ji5xURfEA== 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=8RB1vNKylzS+mtDGYh+fu9xIpasBlRWYcYOjK4+HlF8=; b=ZaFfFk7psUb7BwcXrXJJKF5ARGlE4XA72fLjXC9DHpJz6t4C5tS3Ennre5hk6szgj9bP/A1sliMg3sJAcu+VYd+2Hg2ay/AnRfKmClfLSiBG/vAP4JUPPZhZCJ9T+joIIThp2oRSB3cZwIK3jDUyiknZ+r/LvtGXhlUNJbUKp0zYLp15tb6XA1zEeZqSB3KHNTbroVVNSzVL8/4y+hGwCWuvGFRH92khjVoebQAY3rLjA2ABZdNASUBo89Ov3v05P7LGVMHco9Foa4xO78nqNkDPo5MvAo61CTEx2/dZseyl2W+iG4ZqlDT4NrphmlM3AVCON68MOZQXQftVzUEW+w== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=amd.com; dmarc=pass action=none header.from=amd.com; dkim=pass header.d=amd.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amd.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=8RB1vNKylzS+mtDGYh+fu9xIpasBlRWYcYOjK4+HlF8=; b=ceFI7tFafgeoLA4qb3BsPBT6C7N/eatBog3Wq2AZKy8tvvchcWhMlgmrUjXZJkoBM2JahjuHOjETcqiNpUOMPyldXskaooVLMpH+RWDme9bUFZ3rlSeb+GDjXz4ncKQZBoL32lc3y1EgfTOJn9SD2Oge55Xcm4iLnzi/EuYgbXw= Authentication-Results: redhat.com; dkim=none (message not signed) header.d=none;redhat.com; dmarc=none action=none header.from=amd.com; Received: from SA0PR12MB4430.namprd12.prod.outlook.com (20.181.44.20) by SA0PR12MB4446.namprd12.prod.outlook.com (20.181.44.82) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4331.23; Sat, 17 Jul 2021 19:54:21 +0000 Received: from SA0PR12MB4430.namprd12.prod.outlook.com ([fe80::d0d3:a97e:6b7f:ab39]) by SA0PR12MB4430.namprd12.prod.outlook.com ([fe80::d0d3:a97e:6b7f:ab39%7]) with mapi id 15.20.4331.029; Sat, 17 Jul 2021 19:54:21 +0000 Subject: Re: [PATCH v3 0/8] Support DEVICE_GENERIC memory in migrate_vma_* To: Felix Kuehling , "Theodore Y. Ts'o" References: <20210617151705.15367-1-alex.sierra@amd.com> <905418d1-9099-0ea8-a6e6-84cc8ef3d0b0@amd.com> From: "Sierra Guiza, Alejandro (Alex)" Message-ID: <601418f5-c526-08e9-b071-4533a32ce25d@amd.com> Date: Sat, 17 Jul 2021 14:54:06 -0500 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.12.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US X-ClientProxiedBy: SN6PR05CA0030.namprd05.prod.outlook.com (2603:10b6:805:de::43) To SA0PR12MB4430.namprd12.prod.outlook.com (2603:10b6:806:70::20) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from [172.31.9.47] (165.204.77.11) by SN6PR05CA0030.namprd05.prod.outlook.com (2603:10b6:805:de::43) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4352.8 via Frontend Transport; Sat, 17 Jul 2021 19:54:20 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 190f1b0f-1a23-430b-48b2-08d9495cab82 X-MS-TrafficTypeDiagnostic: SA0PR12MB4446: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:10000; 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Ts'o: >> On Wed, Jun 23, 2021 at 05:49:55PM -0400, Felix Kuehling wrote: >>> I can think of two ways to test the changes for MEMORY_DEVICE_GENERIC in >>> this patch series in a way that is reproducible without special hardware and >>> firmware: >>> >>> For the reference counting changes we could use the dax driver with hmem and >>> use efi_fake_mem on the kernel command line to create some DEVICE_GENERIC >>> pages. I'm open to suggestions for good user mode tests to exercise dax >>> functionality on this type of memory. >> Sorry for the thread necromancy, but now that the merge window is >> past.... > No worries. Alejandro should have a new version of this series in a few > days, with updates to hmm_test and some fixes. V4 patch series have been sent for review. https://marc.info/?l=dri-devel&m=162654971618911&w=2 Regards, Alex Sierra > > >> Today I test ext4's dax support, without having any $$$ DAX hardware, >> by using the kernel command line "memmap=4G!9G:memmap=9G!14G" which >> reserves memory so that creates two pmem device and then I run >> xfstests with DAX enabled using qemu or using a Google Compute Engine >> VM, using TEST_DEV=/dev/pmem0 and SCRATCH_DEV=/dev/pmem1. >> >> If you can give me a recipe for what kernel configs I should enable, >> and what magic kernel command line arguments to use, then I'd be able >> to test your patch set with ext4. > That would be great! > > Regarding kernel config options, it should be the same as what you're > using for DAX testing today. We're not changing or adding any Kconfig > options. But let me take a stab: > > ZONE_DEVICE > HMM_MIRROR > MMU_NOTIFIER > DEVICE_PRIVATE (maybe not needed for your test) > FS_DAX > > I'm not sure what you're looking for in terms of kernel command line, > other than the memmap options you already found. There are some more > options to run hmm_test with fake SPM (DEVICE_GENERIC) memory, but we're > already running that ourselves. That will also be in the next revision > of this patch series. In order to run hmm test with generic device type enabled, set the following: kernel config: EFI_FAKE_MEMMAP RUNTIME_TESTING_MENU TEST_HMM=m Kernel parameters to fake SP memory. The addresses set here are based on my system's usable memory enumerated by BIOS-e820 at boot. The test requires two SP devices of at least 256MB. efi_fake_mem=1G@0x100000000:0x40000,1G@0x140000000:0x40000 To run the hmm_test in generic device type pass the SP addresses to the sh script. sudo ./test_hmm.sh smoke 0x100000000 0x140000000 > > If you can run your xfstests with DAX on top of this patch series, that > would be very helpful. That's to make sure the ZONE_DEVICE page refcount > changes don't break DAX. > > Regards, >   Felix > > >> Cheers, >> >> - Ted