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GET /api/1.2/patches/2219891/?format=api
{ "id": 2219891, "url": "http://patchwork.ozlabs.org/api/1.2/patches/2219891/?format=api", "web_url": "http://patchwork.ozlabs.org/project/ubuntu-kernel/patch/6d9d69a8e57142a53a2da2bb9ca7ee4739e99744.1775379454.git.saviram@nvidia.com/", "project": { "id": 15, "url": "http://patchwork.ozlabs.org/api/1.2/projects/15/?format=api", "name": "Ubuntu Kernel", "link_name": "ubuntu-kernel", "list_id": "kernel-team.lists.ubuntu.com", "list_email": "kernel-team@lists.ubuntu.com", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<6d9d69a8e57142a53a2da2bb9ca7ee4739e99744.1775379454.git.saviram@nvidia.com>", "list_archive_url": null, "date": "2026-04-05T09:02:39", "name": "[SRU,N:linux-bluefield,v1,1/1] net: page_pool: scale alloc cache with PAGE_SIZE", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "a6f2717f931f3d6d3fad89e757c5572400cd0802", "submitter": { "id": 91107, "url": "http://patchwork.ozlabs.org/api/1.2/people/91107/?format=api", "name": "Stav Aviram", "email": "saviram@nvidia.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/ubuntu-kernel/patch/6d9d69a8e57142a53a2da2bb9ca7ee4739e99744.1775379454.git.saviram@nvidia.com/mbox/", "series": [ { "id": 498768, "url": "http://patchwork.ozlabs.org/api/1.2/series/498768/?format=api", "web_url": "http://patchwork.ozlabs.org/project/ubuntu-kernel/list/?series=498768", "date": "2026-04-05T09:02:38", "name": "net: page_pool: scale alloc cache with PAGE_SIZE", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/498768/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2219891/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2219891/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<kernel-team-bounces@lists.ubuntu.com>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (2048-bit key;\n unprotected) header.d=Nvidia.com header.i=@Nvidia.com header.a=rsa-sha256\n header.s=selector2 header.b=jy7o0gKO;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ubuntu.com\n (client-ip=185.125.189.65; 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helo=mail.nvidia.com; pr=C", "permerror client-ip=40.93.194.41;\n envelope-from=saviram@nvidia.com;\n helo=SN4PR0501CU005.outbound.protection.outlook.com" ], "From": "Stav Aviram <saviram@nvidia.com>", "To": "<kernel-team@lists.ubuntu.com>", "Subject": "[SRU][N:linux-bluefield][PATCH v1 1/1] net: page_pool: scale alloc\n cache with PAGE_SIZE", "Date": "Sun, 5 Apr 2026 12:02:39 +0300", "Message-ID": "\n <6d9d69a8e57142a53a2da2bb9ca7ee4739e99744.1775379454.git.saviram@nvidia.com>", "X-Mailer": "git-send-email 2.47.0", "In-Reply-To": "<cover.1775379454.git.saviram@nvidia.com>", "References": "<cover.1775379454.git.saviram@nvidia.com>", "MIME-Version": "1.0", "X-Originating-IP": "[10.126.230.35]", "X-ClientProxiedBy": "rnnvmail203.nvidia.com (10.129.68.9) To\n rnnvmail201.nvidia.com (10.129.68.8)", "X-EOPAttributedMessage": "0", "X-MS-PublicTrafficType": "Email", "X-MS-TrafficTypeDiagnostic": "BN1PEPF00004687:EE_|LV8PR12MB9134:EE_", "X-MS-Office365-Filtering-Correlation-Id": "1820c622-d944-4874-0c99-08de92f22d24", "X-MS-Exchange-SenderADCheck": "1", "X-MS-Exchange-AntiSpam-Relay": "0", "X-Microsoft-Antispam": "BCL:0;\n ARA:13230040|1800799024|82310400026|36860700016|376014|13003099007|22082099003|18002099003|56012099003;", "X-Microsoft-Antispam-Message-Info": "\n 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", "X-Forefront-Antispam-Report": "CIP:216.228.117.161; CTRY:US; LANG:en; SCL:1;\n SRV:;\n IPV:NLI; SFV:NSPM; H:mail.nvidia.com; PTR:dc6edge2.nvidia.com; CAT:NONE;\n SFS:(13230040)(1800799024)(82310400026)(36860700016)(376014)(13003099007)(22082099003)(18002099003)(56012099003);\n DIR:OUT; SFP:1101;", "X-MS-Exchange-AntiSpam-MessageData-ChunkCount": "1", "X-MS-Exchange-AntiSpam-MessageData-0": "\n O5TK3iO3tWwSv3ARhfrfQ88ZfkcOuJSuAwTGk6Yp0j6/c+HneI7ZwjYfb2MQW8ur4CZJ/q0TVh+HostjhaLtEXJGJC1o6cYMt6kBYCrYbSeDpevrzKvTk5x0mP+LsM11tU1HVF34A9xbGes3u+aEC87eANHbKJNmFrAh3w24hmVJdgcj58zJ4ZhZ6TU13E9S7XkKy78fk6xJb+0DuI3adYTSV/VNtv76tFItAijgKnIZIojjFvQf4g+ubBPolmagx5LMVwffBmNn52v5YnaeytysCeUTCyyzfvldW79eaicr/iQ1ZmBNb03lDCMfTb5wAPn/aArPakVeD40kKJfswiKhnisfG6zOdE9eJy1mM666wVrvzh+K2Ep2C9mwZ7AFqv7AuNHDUsWmpIP3OT7glBjjixcePxHE5AwpVmQFhUcufboyoFlpb3ddh7Vx83ak", "X-OriginatorOrg": "Nvidia.com", "X-MS-Exchange-CrossTenant-OriginalArrivalTime": "05 Apr 2026 09:03:16.8230 (UTC)", "X-MS-Exchange-CrossTenant-Network-Message-Id": "\n 1820c622-d944-4874-0c99-08de92f22d24", "X-MS-Exchange-CrossTenant-Id": "43083d15-7273-40c1-b7db-39efd9ccc17a", "X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp": "\n TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a; Ip=[216.228.117.161];\n Helo=[mail.nvidia.com]", "X-MS-Exchange-CrossTenant-AuthSource": "\n BN1PEPF00004687.namprd05.prod.outlook.com", "X-MS-Exchange-CrossTenant-AuthAs": "Anonymous", "X-MS-Exchange-CrossTenant-FromEntityHeader": "HybridOnPrem", "X-MS-Exchange-Transport-CrossTenantHeadersStamped": "LV8PR12MB9134", "X-BeenThere": "kernel-team@lists.ubuntu.com", "X-Mailman-Version": "2.1.20", "Precedence": "list", "List-Id": "Kernel team discussions <kernel-team.lists.ubuntu.com>", "List-Unsubscribe": "<https://lists.ubuntu.com/mailman/options/kernel-team>,\n <mailto:kernel-team-request@lists.ubuntu.com?subject=unsubscribe>", "List-Archive": "<https://lists.ubuntu.com/archives/kernel-team>", "List-Post": "<mailto:kernel-team@lists.ubuntu.com>", "List-Help": "<mailto:kernel-team-request@lists.ubuntu.com?subject=help>", "List-Subscribe": "<https://lists.ubuntu.com/mailman/listinfo/kernel-team>,\n <mailto:kernel-team-request@lists.ubuntu.com?subject=subscribe>", "Content-Type": "text/plain; charset=\"utf-8\"", "Content-Transfer-Encoding": "base64", "Errors-To": "kernel-team-bounces@lists.ubuntu.com", "Sender": "\"kernel-team\" <kernel-team-bounces@lists.ubuntu.com>" }, "content": "From: Nimrod Oren <noren@nvidia.com>\n\nBugLink: https://bugs.launchpad.net/bugs/2147290\n\nThe current page_pool alloc-cache size and refill values were chosen to\nmatch the NAPI budget and to leave headroom for XDP_DROP recycling.\nThese fixed values do not scale well with large pages,\nas they significantly increase a given page_pool's memory footprint.\n\nScale these values to better balance memory footprint across page sizes,\nwhile keeping behavior on 4KB-page systems unchanged.\n\nReviewed-by: Dragos Tatulea <dtatulea@nvidia.com>\nReviewed-by: Tariq Toukan <tariqt@nvidia.com>\nSigned-off-by: Nimrod Oren <noren@nvidia.com>\nLink: https://patch.msgid.link/20260309081301.103152-1-noren@nvidia.com\nSigned-off-by: Jakub Kicinski <kuba@kernel.org>\n(cherry picked from commit 15abbe7c82661209c1dc67c21903c07e2fff5aae)\nSigned-off-by: Stav Aviram <saviram@nvidia.com>\n---\n include/net/page_pool/types.h | 11 ++++++++++-\n 1 file changed, 10 insertions(+), 1 deletion(-)", "diff": "diff --git a/include/net/page_pool/types.h b/include/net/page_pool/types.h\nindex 76481c465375..08d3c46a0058 100644\n--- a/include/net/page_pool/types.h\n+++ b/include/net/page_pool/types.h\n@@ -28,6 +28,8 @@\n * use-case. The NAPI budget is 64 packets. After a NAPI poll the RX\n * ring is usually refilled and the max consumed elements will be 64,\n * thus a natural max size of objects needed in the cache.\n+ * The refill watermark is set to 64 for 4KB pages,\n+ * and scales to balance its size in bytes across page sizes.\n *\n * Keeping room for more objects, is due to XDP_DROP use-case. As\n * XDP_DROP allows the opportunity to recycle objects directly into\n@@ -35,8 +37,15 @@\n * cache is already full (or partly full) then the XDP_DROP recycles\n * would have to take a slower code path.\n */\n-#define PP_ALLOC_CACHE_SIZE\t128\n+#if PAGE_SIZE >= SZ_64K\n+#define PP_ALLOC_CACHE_REFILL\t4\n+#elif PAGE_SIZE >= SZ_16K\n+#define PP_ALLOC_CACHE_REFILL\t16\n+#else\n #define PP_ALLOC_CACHE_REFILL\t64\n+#endif\n+\n+#define PP_ALLOC_CACHE_SIZE\t(PP_ALLOC_CACHE_REFILL * 2)\n struct pp_alloc_cache {\n \tu32 count;\n \tstruct page *cache[PP_ALLOC_CACHE_SIZE];\n", "prefixes": [ "SRU", "N:linux-bluefield", "v1", "1/1" ] }