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GET /api/patches/2208259/?format=api
{ "id": 2208259, "url": "http://patchwork.ozlabs.org/api/patches/2208259/?format=api", "web_url": "http://patchwork.ozlabs.org/project/uboot/patch/20260310125846.413956-1-pranav.vinaytilak@amd.com/", "project": { "id": 18, "url": "http://patchwork.ozlabs.org/api/projects/18/?format=api", "name": "U-Boot", "link_name": "uboot", "list_id": "u-boot.lists.denx.de", "list_email": "u-boot@lists.denx.de", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260310125846.413956-1-pranav.vinaytilak@amd.com>", "list_archive_url": null, "date": "2026-03-10T12:58:25", "name": "[v2] net: lwip: scale buffer pool size with TFTP block size", "commit_ref": null, "pull_url": null, "state": "accepted", "archived": false, "hash": "13b8ebe1ceaffa1ba8fd3601008c1fa38066017c", "submitter": { "id": 92380, "url": "http://patchwork.ozlabs.org/api/people/92380/?format=api", "name": "Pranav Tilak", "email": "pranav.vinaytilak@amd.com" }, "delegate": { "id": 157425, "url": "http://patchwork.ozlabs.org/api/users/157425/?format=api", "username": "jforissier", "first_name": "Jerome", "last_name": "Forissier", "email": "jerome.forissier@linaro.org" }, "mbox": "http://patchwork.ozlabs.org/project/uboot/patch/20260310125846.413956-1-pranav.vinaytilak@amd.com/mbox/", "series": [ { "id": 495195, "url": "http://patchwork.ozlabs.org/api/series/495195/?format=api", "web_url": "http://patchwork.ozlabs.org/project/uboot/list/?series=495195", "date": "2026-03-10T12:58:25", "name": "[v2] net: lwip: scale buffer pool size with TFTP block size", "version": 2, "mbox": "http://patchwork.ozlabs.org/series/495195/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2208259/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2208259/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<u-boot-bounces@lists.denx.de>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=amd.com header.i=@amd.com header.a=rsa-sha256\n header.s=selector1 header.b=fTDaf/YU;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.denx.de\n (client-ip=2a01:238:438b:c500:173d:9f52:ddab:ee01; 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helo=satlexmb08.amd.com; pr=C", "None (SATLEXMB04.amd.com: pranav.vinaytilak@amd.com does not\n designate permitted sender hosts)" ], "From": "Pranav Tilak <pranav.vinaytilak@amd.com>", "To": "<u-boot@lists.denx.de>, <michal.simek@amd.com>", "CC": "<git@amd.com>, <jonas@kwiboo.se>, <padmarao.begari@amd.com>, Pranav Tilak\n <pranav.vinaytilak@amd.com>, Jerome Forissier <jerome.forissier@arm.com>,\n Tom Rini <trini@konsulko.com>", "Subject": "[PATCH v2] net: lwip: scale buffer pool size with TFTP block size", "Date": "Tue, 10 Mar 2026 18:28:25 +0530", "Message-ID": "<20260310125846.413956-1-pranav.vinaytilak@amd.com>", "X-Mailer": "git-send-email 2.34.1", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "Content-Type": "text/plain", "X-EOPAttributedMessage": "0", "X-MS-PublicTrafficType": "Email", "X-MS-TrafficTypeDiagnostic": "CH2PEPF0000009E:EE_|LV9PR12MB9830:EE_", "X-MS-Office365-Filtering-Correlation-Id": "9fe156bc-9d7c-4123-39de-08de7ea4d81b", "X-MS-Exchange-SenderADCheck": "1", "X-MS-Exchange-AntiSpam-Relay": "0", "X-Microsoft-Antispam": "BCL:0;\n ARA:13230040|36860700016|1800799024|376014|82310400026;", "X-Microsoft-Antispam-Message-Info": "\n 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", "X-Forefront-Antispam-Report": "CIP:165.204.84.17; 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Ip=[165.204.84.17];\n Helo=[satlexmb08.amd.com]", "X-MS-Exchange-CrossTenant-AuthSource": "\n CH2PEPF0000009E.namprd02.prod.outlook.com", "X-MS-Exchange-CrossTenant-AuthAs": "Anonymous", "X-MS-Exchange-CrossTenant-FromEntityHeader": "HybridOnPrem", "X-MS-Exchange-Transport-CrossTenantHeadersStamped": "LV9PR12MB9830", "X-BeenThere": "u-boot@lists.denx.de", "X-Mailman-Version": "2.1.39", "Precedence": "list", "List-Id": "U-Boot discussion <u-boot.lists.denx.de>", "List-Unsubscribe": "<https://lists.denx.de/options/u-boot>,\n <mailto:u-boot-request@lists.denx.de?subject=unsubscribe>", "List-Archive": "<https://lists.denx.de/pipermail/u-boot/>", "List-Post": "<mailto:u-boot@lists.denx.de>", "List-Help": "<mailto:u-boot-request@lists.denx.de?subject=help>", "List-Subscribe": "<https://lists.denx.de/listinfo/u-boot>,\n <mailto:u-boot-request@lists.denx.de?subject=subscribe>", "Errors-To": "u-boot-bounces@lists.denx.de", "Sender": "\"U-Boot\" <u-boot-bounces@lists.denx.de>", "X-Virus-Scanned": "clamav-milter 0.103.8 at phobos.denx.de", "X-Virus-Status": "Clean" }, "content": "TFTP transfers fail when tftpblocksize is set to 8192 or larger due to\ninsufficient buffer resources for IP fragment reassembly.\n\nCalculate PBUF_POOL_SIZE and IP_REASS_MAX_PBUFS dynamically based on\nCONFIG_TFTP_BLOCKSIZE using IP fragmentation boundaries (1480 usable\nbytes per fragment at 1500 MTU). The pool size includes headroom for\nTX, ARP, and protocol overhead, while ensuring PBUF_POOL_SIZE remains\ngreater than IP_REASS_MAX_PBUFS as required by lwIP.\n\nSigned-off-by: Pranav Tilak <pranav.vinaytilak@amd.com>\n---\n lib/lwip/u-boot/lwipopts.h | 16 +++++++++++++++-\n 1 file changed, 15 insertions(+), 1 deletion(-)", "diff": "diff --git a/lib/lwip/u-boot/lwipopts.h b/lib/lwip/u-boot/lwipopts.h\nindex e8a2c9d7a0a..4a1f8086673 100644\n--- a/lib/lwip/u-boot/lwipopts.h\n+++ b/lib/lwip/u-boot/lwipopts.h\n@@ -65,7 +65,21 @@\n #define MEM_ALIGNMENT 8\n \n #define MEMP_NUM_TCP_SEG 16\n+\n+/* IP fragmentation parameters for TFTP reassembly */\n+#define IP_FRAG_MTU_USABLE 1480\n+#define PBUF_POOL_HEADROOM 6\n+#define PBUF_POOL_RESERVE 4\n+#define TFTP_BLOCKSIZE_THRESHOLD 4096\n+\n+#if defined(CONFIG_TFTP_BLOCKSIZE) && (CONFIG_TFTP_BLOCKSIZE > TFTP_BLOCKSIZE_THRESHOLD)\n+#define PBUF_POOL_SIZE\t\t\t(((CONFIG_TFTP_BLOCKSIZE + (IP_FRAG_MTU_USABLE - 1)) / \\\n+\t\t\t\t\t IP_FRAG_MTU_USABLE) + PBUF_POOL_HEADROOM)\n+#define IP_REASS_MAX_PBUFS\t\t(PBUF_POOL_SIZE - PBUF_POOL_RESERVE)\n+#else\n #define PBUF_POOL_SIZE 8\n+#define IP_REASS_MAX_PBUFS 4\n+#endif\n \n #define LWIP_ARP 1\n #define ARP_TABLE_SIZE 4\n@@ -76,7 +90,7 @@\n #define IP_REASSEMBLY 1\n #define IP_FRAG 1\n #define IP_REASS_MAXAGE 3\n-#define IP_REASS_MAX_PBUFS 4\n+\n #define IP_FRAG_USES_STATIC_BUF 0\n \n #define IP_DEFAULT_TTL 255\n", "prefixes": [ "v2" ] }