From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from SA9PR02CU001.outbound.protection.outlook.com (mail-southcentralusazon11013037.outbound.protection.outlook.com [40.93.196.37]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 20E1A345CC0 for ; Mon, 23 Feb 2026 06:19:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.93.196.37 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771827594; cv=fail; b=hkTeXPjL5nBAk/sHX3nL+MgFAp65Op/dVO1foCe5viNwn5BgmMu5KWimtpcR4zQSpg7UdfCOF5Z+jYxLerh1UCz0z7JykLhMwdwarEdmQLjl9TTC3YjO7RCZFScQUfLY7k8Y9uYuRZLzVzAN6Pi4OgkWElf000OgTluFSslfDbs= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771827594; c=relaxed/simple; bh=faKQI5dJUB8gVqtb343GK+SjLQ+6gl5KjN5pY/NWkEQ=; h=Message-ID:Date:Subject:To:References:From:In-Reply-To: Content-Type:MIME-Version; b=mUU7AgyDfOYQwCOaIdIc+gmaiFOo8oi6qsViwUX1+GoUXty2qtYa0SLHh5SQFKqraD9J5PI1aLN/P3BpqMFBgdEALG5YBKjo4uZMwDUiS6gViIaV/uOVY6Ej+QLjX/ESddbp2Tm5b9eHjuzoYXfkrV+FQopCc1xrIy2jAq7xJ3I= ARC-Authentication-Results:i=2; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amd.com; spf=fail smtp.mailfrom=amd.com; dkim=pass (1024-bit key) header.d=amd.com header.i=@amd.com header.b=liCb05d0; arc=fail smtp.client-ip=40.93.196.37 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amd.com Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=amd.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=amd.com header.i=@amd.com header.b="liCb05d0" ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=tsSNQsqCAIVhW88G0gywauQd8Hsacb2iMWExoX1bzHkVyCKUgwF98MFVytAES+sTuNvI7IKIuTA+BfCGLj7hRiE7Lmnb8nSHCZoKnHAoRAPDe7JapoITWNpleZPMSzP5uhA1htY/UHslW+fZgaXaaYzs9Pa30XiHi9vLhYzhGTDCdp6YYCU3PpkiaS6EsSO2AYWxDekMc8+4Uowe/qvGJN7K/VnHccbqW95TvTMKTuzzIzziP1mB5eBKAOmIkxnqPfOzEy8CBLYUW7U6ouaOxrCOHBKd9XxhF+WPLu9Ncn3BpS6Jsm55ZDgP5sIHX6240Hd0TxaBYXf/FdkoZgJgRw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=nXBPhAOUaNlFWL2Y42AgqBbCGUzyNxenxkTwOKm2ih0=; b=BvvrY9oFwVvHJ0yFWfw9p089jLVXc61jqr7AuXWKQMRD5jaISbUW3p2oPn83Mu0gCCZO7vHAH48zG9AnLA+bKb0hK4RJ2kqDsvTNwoQNmW8kaIviDCXum6kU2w/qtaKW+z64JsHLszjLtQ6ykpVuaRw3rIu62xu0Bhcoe5XVyfFIrFjfvs8nr/6c3XIhRc5DHgZD2wgH205MEYOUz70yetlEZ4o0y2aawDPn9f++5vwCGqfes2AuOuUrchGcOTdkWTABDFglQBIyY6BEvbODsOakXjVoMpifSKfcRoIlzgqj2BuCv+zqsQC3fLDINBMgk6Hmw7OIrudOFTv7VZZm0w== 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=nXBPhAOUaNlFWL2Y42AgqBbCGUzyNxenxkTwOKm2ih0=; b=liCb05d0VFNT/J/h4fhFRi9NXg/EaiarMLGyy3aJwsJJiVy/1q9k2+s/J5DtKVsLNbzTTCGB/i4+sygD4j3c+ez8qnaRaWZbifUMd3pMZdizZDOjjFS0AqL//1rKK4/qRDNqhJAVSk6P6WDcZyAOCDtqs/xlKDkX04DULSGWvOA= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=amd.com; Received: from DS7PR12MB5766.namprd12.prod.outlook.com (2603:10b6:8:75::12) by MN0PR12MB5906.namprd12.prod.outlook.com (2603:10b6:208:37a::10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9632.13; Mon, 23 Feb 2026 06:19:49 +0000 Received: from DS7PR12MB5766.namprd12.prod.outlook.com ([fe80::222:966a:d65d:d08e]) by DS7PR12MB5766.namprd12.prod.outlook.com ([fe80::222:966a:d65d:d08e%4]) with mapi id 15.20.9632.017; Mon, 23 Feb 2026 06:19:49 +0000 Message-ID: <9a940db6-80a7-4c6c-8138-0b4d85f6a402@amd.com> Date: Mon, 23 Feb 2026 11:49:42 +0530 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] iommu/amd: Add NUMA node affinity for IOMMU log buffers To: lirongqing , Joerg Roedel , Suravee Suthikulpanit , Will Deacon , Robin Murphy , iommu@lists.linux.dev, linux-kernel@vger.kernel.org References: <20260211035839.1970-1-lirongqing@baidu.com> Content-Language: en-US From: Vasant Hegde In-Reply-To: <20260211035839.1970-1-lirongqing@baidu.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-ClientProxiedBy: PN4PR01CA0084.INDPRD01.PROD.OUTLOOK.COM (2603:1096:c01:26d::14) To DS7PR12MB5766.namprd12.prod.outlook.com (2603:10b6:8:75::12) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS7PR12MB5766:EE_|MN0PR12MB5906:EE_ X-MS-Office365-Filtering-Correlation-Id: 5de07a9c-cff1-4535-5f42-08de72a38c69 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|376014|1800799024|7053199007; X-Microsoft-Antispam-Message-Info: =?utf-8?B?UzZ2K1Q5OC9hSGoxYUR0OHBRSkE5MVZKWVQrdFJCRzQvcGRVTWhEZWlCYmlB?= =?utf-8?B?Mm1RM3AxVUJRdjlXTDN1eThYK0E3YW5zNTdJd0ErWU5aM3RQSmR0NWRXTlhY?= =?utf-8?B?dk5xN2FSVm13Y2NXeHRLVkVIR2Vta2kxNCtldkpOcGV5c0k0cTFvUWpvT0VR?= =?utf-8?B?emc1ZmZZN0M3T3lPU1FFbURUNktnZ3BLb2JYTUZuUEtlN3g0TkRWYlo2a1RB?= =?utf-8?B?RDRtWFRvaCtGZDhqMTRHWUtTcHM2TmllUE5UbUZDTVdCTWpOR3M4MXlTdkY0?= =?utf-8?B?TWdoQnhhY0ppMjUyRm5OOFd1dEJjOEhGS2xKWmhsc0hXRy9BWnhlZjBVZWt1?= =?utf-8?B?TzRERWc3ZkM5ZmhTVm9vRU5GMm45V3VUQVlid2orRlR3V2RDcHlHemcwS2lB?= =?utf-8?B?cnV4L3VpN0ZtUFBuZk8xSXNITS8rSmJqeUp1WGVEUXREWXJlZTVKRkp6Z0w1?= =?utf-8?B?N1ZjUnVwaE5KUUZZNklDYmpDK2dxL1VCcXlNcUExM09kUWJmcXJZa0hyUU5T?= =?utf-8?B?T1pTUVlPN2FtT2dtajVvNms4OHlpM080M3lhZnY2WU0zMGloNzdWQi96Sm1t?= =?utf-8?B?V3loTHM1cFovWHh4TEh3RndpdHUrc1IvZXJoVXdWZ2NYYWgzck54REp1RE5Y?= =?utf-8?B?Q0NDT0RrNW9MM0g2SDRNYWhkamM4QTlJdHdYYkMwVGVYelJoUVVhbUg5MVg0?= =?utf-8?B?UVNnbEFmYlkzNjRobEhJMG43S2VqRUNMc01qTWhqZG5vSjRhMlhHbGRlU3h4?= =?utf-8?B?cU1TU0tPd05pMWVCZW4rRTNyS2N3NlpraTF1bklTbkZoTlNLb2tOOEhsTHpR?= =?utf-8?B?dkFiVC9RbllaNEQ5b25jSDRsaWhLd3UxY0toWXc4aXVaR0xqRXNBc2dpWjNS?= =?utf-8?B?M25LUm92UnZESXdiRG00SXhQcDdtcTB1MTk1Syt0dWJVTEJiT2RLRHNPNGVy?= =?utf-8?B?L3FIZlFobWJ3ZHN4NnpyY0RqVHNNM0dTeWxZdWNVM3BPVnhMQjRRczU5ZkdV?= =?utf-8?B?SGkrMU1EQTIxeTcxb3FpQzkzMkx1bDc2WXZwdzJpRlhNNGw4SEpLR2E4ejc0?= =?utf-8?B?V3ZxczloZVRLcUQ2ZENoNmVRYnRZVVNLenlNYU9RTlMzMUNQUWV4SHFTam9D?= =?utf-8?B?NVplWFJZQzg5bGR6YmFtZlY5QllDQTJ2MjVYcEwyT2xsV0lMRm40aFhERzQ2?= =?utf-8?B?NUJCdHZPNnBRdVNJUEZPKzgrY0NVTXZTaFVPSEpKdUQzbmF5dFl1ZmFqMW9S?= =?utf-8?B?R1oxNGR1OEFtbDNvQnJ1NUMzN1FCUi9GUU93L25DZ0JuN1p1Vm1pdUNJczRs?= =?utf-8?B?RG9CUWwzOEdhc1BvblRCSmI1dHAxbUhOa0Q4dlB6a1NGNllZVDl2c2NlOXY5?= =?utf-8?B?YWJ6c0EraCtEdXRZT0R0MDJwM3JQREZwWE9DKzhCZlhYRWFGZWVMazRnbXNi?= =?utf-8?B?TmNLS2hsYmxNdjNuSXhYMWJ3bGx4Wm03SzNIK1AzMlhreWpYdXlueFFqSXZO?= =?utf-8?B?dUpuSnpmRFNYTG9iQUt2ZEZPNGRiL3FHMmlQR1NTTVJwdG1jbThoRVBUdThE?= =?utf-8?B?VExEMHo1dkFTRDBlaW45OUkzR0N4Ry9reGk4RzR5UkNsVEpvSkdhS0hEb0cr?= =?utf-8?B?cEpjRXZFbEo5cXVMQWlVOE9OWDdFRyt6QlQ3cVlseXQ0OHpuSnliNjJPRVJ2?= =?utf-8?B?WGZ2OEZoL0VoNExGMXJxdjJRSitBKzN4VVYwT25HL3hmenEvQWI1TFRVak5G?= =?utf-8?B?ZFdkSmR3NGZXRktYUyt5MzY0SC9wWlBYVTh5VE9YMmRPQ1E5aXl0cVZUNktq?= =?utf-8?B?UEVOYlFYMWtlNXlsSmNSSmtJczRRY2FXZWdWRnN0QXpudU85OGpWQ0JHditz?= =?utf-8?B?Tis2anpJVkY2STNhWjlYbEtHd3VCUnFsaWhlcDBJZG1YOHBKa3IyeGY1ckJP?= =?utf-8?B?d1E2OU9UZFQvbFZWaG50T2JCckY4M1FDVWp6M1N4MjVMNGdOZVR2Q2V5Z011?= =?utf-8?B?dlhZRjJKWU9wT1BFcWJsSjVBV3RxTnNUMnNlQ3dpMTBGVHVwTys0bFV6d2t4?= =?utf-8?B?bVVkbzhwQUk4R0F6UzNwVUdGZks5K2t0QTlpbnlmUmZyQXFhMEdLd1dSY1lW?= =?utf-8?Q?n5RM=3D?= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:DS7PR12MB5766.namprd12.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(366016)(376014)(1800799024)(7053199007);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?B?MjJmby84WHJ3Z2ZFano0UmthS0xpckw3cFBwbHRQN0pKOVBPbGc5c1dmcHBk?= =?utf-8?B?cjNkQ0lJQkpTK25KaURpb01Hcm9VeDZJc0krY1BROWdLRVZGejZPSjRPMkV3?= =?utf-8?B?VVpqSDVKb1B2VDZlL0Fqd3dQVXFhc0FCTjdnSkVsYkd5aEE4eHVNNCtaUUgx?= =?utf-8?B?emFzM0pOWkQrVTNYaVBETlJFaEpBd2E0endDQ0wwdHQvWlhaaFRFTTFQdnZZ?= =?utf-8?B?cGthRGJMTTUzb0RUWHN4RUdmdzg1NDhxdWdYZmJuS212REV1bWpBa3BSaGJo?= =?utf-8?B?Q0JSbmt6OGh3UzZrY2d0eWtSVms0WHVZMk1EWjAxdTZiVFUyWkxiUEtKV3Ni?= =?utf-8?B?cEY3c3hIRXpNdTFYSkVmc253WWNiQVlpWTJyR2JmR3laYWdueVZvOXM0RDN3?= =?utf-8?B?NXhhRFhUditiS3BQTkExa1pNdVc1VFMzV1lkWGVjVGNDOXZHdUFudE12Kytl?= =?utf-8?B?S1cxZkNETjJDTXE2dE96UUZWSDNHaXVuWW56K3FpMERBREdWbEIveGcySVlv?= =?utf-8?B?VTBtK3R3VWdrOVN0eUtXdDBMTlZacTNVb0czaFNseDhwbk1oZFk3QzUvdmxa?= =?utf-8?B?Qk9XSHRZRGw3bE53MWVOd1ZxbUhuZTYwQ1RZdFNNSXA2RVlrU3BpLzltbzFa?= =?utf-8?B?MFJ2YW5CVkwvM3JDbmJQcHJBbXZTMmt5dnlTZ0tpSjg0RFpZQnYzQWRsZ0FN?= =?utf-8?B?Sng1elhwMm45ZG9HSWRibjB4d1dJaGErb0Z5TTVzVWNlaU1xbnNhaTNiV3lK?= =?utf-8?B?dTk3ZlNOa252MFNxS2RJM05OaEVpVEdGSERKalpRVWdyNlZabWhLbEpJb2FF?= =?utf-8?B?Y2Z4UnVEOElVcDJKaGR6UHpmTVVXYllBdTBXTElvZlQybjVXRFRYT3o2VEFO?= =?utf-8?B?T3kvekIyWjJMdnJiZkJ2cy9LZU9ISldFS2tNd29jS0ExeDB4YmJzbjVWSUJF?= =?utf-8?B?RFFOY0pPN2hPb3pTUUJYTGtmSkZ2VVdnUDRxOHdzb3hlU0tvRWlZdExiSVk3?= =?utf-8?B?SVkyc00zZVkva2thb1NMVjFaaEdiTkZvUzU5QUhkRlE2djhuU0VWTGhKZHpQ?= =?utf-8?B?ZzMxRzFlb0lNY3R3ZGxTd2h1dXNFWGc5MHNlQmhvMlhzSy9wa3NEQ0VsTUps?= =?utf-8?B?THRpVVhBSkVuQ1JMZEFuWnVpZXJPa2l5Q1A0WUZ3VzN2RTcrS2hQMGo4Q3pu?= =?utf-8?B?M3ZENTl4K1ZwU045UW5RSElNK2xYN1R4ZkRhdWkzUTVxRUVIdUd3aXV3R2ZR?= =?utf-8?B?aDZ4YTl2cWpJcWV1dVJuUjZHVG53U0p2VW40TFJDNmtVZ1Z4R1BuNjdYR29J?= =?utf-8?B?QW5uWHprSzdtMkdkOHE3cGdsZk10c3dpaFp6ckFhUFZudjU5QStINHRqeWhz?= =?utf-8?B?cWQrUnpvbjRDKzBtU0RIbFdJSW1jWGtLc0pmMXF4VnFOeTY3VnQ2TW5OaFhB?= =?utf-8?B?Vk12U1FxNFpTR0p2YlJMVlNUakE1UER6c0F1ZDFGUHlhekgrUmljeGJFOVFp?= =?utf-8?B?cFhTZkFnUEVjNis0MTZEcFoySkxLWStNREFkT0hQOSszZkFhUVVMYVUwZUov?= =?utf-8?B?NFZSUEduZS9OVmpra0ZEQ0E3UlBINmdkeXVXL09SdXJtZFgyUTVsZmdFZnky?= =?utf-8?B?MHoyaEN1Mjh4T1NCbXZLY1NKMjlyWkJ6NmtTTlFTWnBQZGRabHM1L0dnOXA4?= =?utf-8?B?aittVWlFUXUreUNUT0NUYXdSUGthZUF3d0RwYWU3SFF1ZlZvZGhrSWFidTgx?= =?utf-8?B?dUFMOGx5aTcwNlg1SmtzVkR6WVVkWkJvVTBuYnJ1bCsrQm55VE9nbUFVQTV0?= =?utf-8?B?WVBkcnI2cnNDL2p4c2dWYVMzekhHYzNaMWQ2d3N5U2x5ek1tTGNXdVpNTXZp?= =?utf-8?B?U09UakQrTWplMUFESFV0Z3FpeU04TlNLaU42QnY5WHJzKzJwWG83bzdCMEVQ?= =?utf-8?B?R0pvWjlWTTNoZC8xMTQwRGFqWmJ2dFRJWW1XZEpSbVZydkM1MDVGQmVGNW1z?= =?utf-8?B?RU5pTVd3K3RMYkxWaEw1Unc5SXBHdGxGN2dIWHFIOTF5QXJ3QUlYUG0zQldI?= =?utf-8?B?Mi9URDdxNnFUSHJ0WlBCTTBoWCtuT3lIVG1iMElETHJiUStpc1R1WmJRell1?= =?utf-8?B?N3lnak1HVFlObDB5MHhHeWtyL2wxQjNiLzltMXgwRVQ1c1pmRzlHVldjSWha?= =?utf-8?B?S1liYWtsaE1vN1phdVpkNnJUaURJcFVLeTg3dmczeGdWTlhGSlVTR3NnZ29y?= =?utf-8?B?UGtWOEdtMWJVbXRFUWJKeXJoTEVwK0NPSFN4Q09TV0dZVjVaRkcrWkNkYS9r?= =?utf-8?B?Yk9Ha3RpYkNoUWZYWkZkanhCcy80Q0srR2xlSVE0UTFnQkVQS211UT09?= X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-Network-Message-Id: 5de07a9c-cff1-4535-5f42-08de72a38c69 X-MS-Exchange-CrossTenant-AuthSource: DS7PR12MB5766.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 23 Feb 2026 06:19:49.5258 (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: rElcI8WE3BbWM0sM2jUndCGGbXxxCoeQUUjtU5xJ0DhytrAgm/Wc35gTfzuaryHPpK0azutZlL0H1+gUGEvOAQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN0PR12MB5906 On 2/11/2026 9:28 AM, lirongqing wrote: > From: Li RongQing > > Currently, PPR Log and GA logs for AMD IOMMU are allocated using > iommu_alloc_pages_sz(), which does not account for NUMA affinity. This can > lead to remote memory access latencies if the memory is allocated on a > different node than the IOMMU hardware. > > Switch to iommu_alloc_pages_node_sz() to ensure that these data structures > are allocated on the same NUMA node as the IOMMU device. If the node > information is unavailable, it defaults to NUMA_NO_NODE. > > Signed-off-by: Li RongQing Reviewed-by: Vasant Hegde -Vasant