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GET /api/patches/2227816/?format=api
{ "id": 2227816, "url": "http://patchwork.ozlabs.org/api/patches/2227816/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-tegra/patch/20260424095820.1433700-1-kkartik@nvidia.com/", "project": { "id": 21, "url": "http://patchwork.ozlabs.org/api/projects/21/?format=api", "name": "Linux Tegra Development", "link_name": "linux-tegra", "list_id": "linux-tegra.vger.kernel.org", "list_email": "linux-tegra@vger.kernel.org", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260424095820.1433700-1-kkartik@nvidia.com>", "list_archive_url": null, "date": "2026-04-24T09:58:20", "name": "pstore/zone: Emit registration message as a single pr_info()", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "98492946312303d0b1df9c8c9fdb3f293c7941f4", "submitter": { "id": 83016, "url": "http://patchwork.ozlabs.org/api/people/83016/?format=api", "name": "Kartik Rajput", "email": "kkartik@nvidia.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-tegra/patch/20260424095820.1433700-1-kkartik@nvidia.com/mbox/", "series": [ { "id": 501334, "url": "http://patchwork.ozlabs.org/api/series/501334/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-tegra/list/?series=501334", "date": "2026-04-24T09:58:20", "name": "pstore/zone: Emit registration message as a single pr_info()", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/501334/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2227816/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2227816/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linux-tegra+bounces-13939-incoming=patchwork.ozlabs.org@vger.kernel.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linux-tegra@vger.kernel.org" ], "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=Nvidia.com header.i=@Nvidia.com header.a=rsa-sha256\n header.s=selector2 header.b=jAcnT1mp;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c09:e001:a7::12fc:5321; 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pr=C", "From": "Kartik Rajput <kkartik@nvidia.com>", "To": "Kees Cook <kees@kernel.org>, Tony Luck <tony.luck@intel.com>, \"Guilherme G\n . Piccoli\" <gpiccoli@igalia.com>, Jon Hunter <jonathanh@nvidia.com>, \"Thierry\n Reding\" <thierry.reding@kernel.org>, <linux-kernel@vger.kernel.org>,\n\t<linux-tegra@vger.kernel.org>", "CC": "Kartik Rajput <kkartik@nvidia.com>", "Subject": "[PATCH] pstore/zone: Emit registration message as a single pr_info()", "Date": "Fri, 24 Apr 2026 15:28:20 +0530", "Message-ID": "<20260424095820.1433700-1-kkartik@nvidia.com>", "X-Mailer": "git-send-email 2.43.0", "Precedence": "bulk", "X-Mailing-List": "linux-tegra@vger.kernel.org", "List-Id": "<linux-tegra.vger.kernel.org>", "List-Subscribe": "<mailto:linux-tegra+subscribe@vger.kernel.org>", "List-Unsubscribe": "<mailto:linux-tegra+unsubscribe@vger.kernel.org>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "Content-Type": "text/plain", "X-NV-OnPremToCloud": "ExternallySecured", "X-EOPAttributedMessage": "0", "X-MS-PublicTrafficType": "Email", "X-MS-TrafficTypeDiagnostic": "BN3PEPF0000B075:EE_|MW4PR12MB7288:EE_", "X-MS-Office365-Filtering-Correlation-Id": "ffafa5fe-a984-4701-4272-08dea1e81cb3", "X-MS-Exchange-SenderADCheck": "1", "X-MS-Exchange-AntiSpam-Relay": "0", "X-Microsoft-Antispam": "\n\tBCL:0;ARA:13230040|82310400026|1800799024|376014|36860700016|18002099003|56012099003;", "X-Microsoft-Antispam-Message-Info": "\n\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", "X-Forefront-Antispam-Report": "\n\tCIP:216.228.117.161;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge2.nvidia.com;CAT:NONE;SFS:(13230040)(82310400026)(1800799024)(376014)(36860700016)(18002099003)(56012099003);DIR:OUT;SFP:1101;", "X-MS-Exchange-AntiSpam-MessageData-ChunkCount": "1", "X-MS-Exchange-AntiSpam-MessageData-0": "\n\tFti2HeDnH/SRoyq6pAJJLD1+hlUWqSG3Vcd99LFpvayR6fGp2AuI0wpgq4O+EOMJ7y9Q/ajmZO1CIv5aOlpbmmaZshaIxpREY6CXYvupzQxqwzqX3YIa5fw2OZqeNi7JXE5Qak0fG48llIZTG0ht8gqJnsN/+QJd1g9TzltvbOqEUognMScxR1P4jvxT2hpCaioilc+XeW2Lt5hHju7AqRGBqeLUA6rrVIg1BANFTFCq5RiMB8+qadiDecDxHtoOdyx2x7J6tpHbkZ8yZ93a3B7sG67Tr/a8X7DQ+R3qHiNagKPZXy2jetJVL5jMCynslXJ7VObKyLHnAoPg/e0a49bzL5+ORAJrC7aKVL9JA2oEufQWWCzmSplKPpaEgh65wYHxa2YxGRveK7o4CsnRtIFeztBbU7wqWStjmJBqPFISSBs/anX5GXPauO6Z4Q1c", "X-OriginatorOrg": "Nvidia.com", "X-MS-Exchange-CrossTenant-OriginalArrivalTime": "24 Apr 2026 09:59:01.7260\n (UTC)", "X-MS-Exchange-CrossTenant-Network-Message-Id": "\n ffafa5fe-a984-4701-4272-08dea1e81cb3", "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];Helo=[mail.nvidia.com]", "X-MS-Exchange-CrossTenant-AuthSource": "\n\tBN3PEPF0000B075.namprd04.prod.outlook.com", "X-MS-Exchange-CrossTenant-AuthAs": "Anonymous", "X-MS-Exchange-CrossTenant-FromEntityHeader": "HybridOnPrem", "X-MS-Exchange-Transport-CrossTenantHeadersStamped": "MW4PR12MB7288" }, "content": "register_pstore_zone() prints its \"registered ... as backend for ...\"\nsummary as a pr_info() followed by several pr_cont() calls.\n\npr_cont() is not atomic and has no log level of its own. It appends\nto whichever line was most recently opened by a printk(). If a\npr_err() or pr_warn() from another CPU or an interrupt handler\npreempts the pr_info() / pr_cont() sequence, it closes the\ncontinuation between the fragments. This can cause parts of the\npstore registration message to appear at the wrong log level and be\ninterleaved with other messages.\n\nFurthermore, this causes the detection of new warning and error\nmessages in the kernel log to be unreliable.\n\nFormat the registration line in a small local buffer using\nscnprintf() and emit it with a single pr_info() call, making the\nline atomic with respect to concurrent printk() callers. No\nfunctional change to registration.\n\nSigned-off-by: Kartik Rajput <kkartik@nvidia.com>\n---\n fs/pstore/zone.c | 20 ++++++++++----------\n 1 file changed, 10 insertions(+), 10 deletions(-)", "diff": "diff --git a/fs/pstore/zone.c b/fs/pstore/zone.c\nindex a3b003f9a3a0..fbe0a252dd2a 100644\n--- a/fs/pstore/zone.c\n+++ b/fs/pstore/zone.c\n@@ -1301,6 +1301,8 @@ int register_pstore_zone(struct pstore_zone_info *info)\n {\n \tint err = -EINVAL;\n \tstruct psz_context *cxt = &pstore_zone_cxt;\n+\tchar buf[256] = \"\";\n+\tsize_t len = 0;\n \n \tif (info->total_size < 4096) {\n \t\tpr_warn(\"total_size must be >= 4096\\n\");\n@@ -1383,30 +1385,28 @@ int register_pstore_zone(struct pstore_zone_info *info)\n \t}\n \tcxt->pstore.data = cxt;\n \n-\tpr_info(\"registered %s as backend for\", info->name);\n \tcxt->pstore.max_reason = info->max_reason;\n \tcxt->pstore.name = info->name;\n \tif (info->kmsg_size) {\n \t\tcxt->pstore.flags |= PSTORE_FLAGS_DMESG;\n-\t\tpr_cont(\" kmsg(%s\",\n-\t\t\tkmsg_dump_reason_str(cxt->pstore.max_reason));\n-\t\tif (cxt->pstore_zone_info->panic_write)\n-\t\t\tpr_cont(\",panic_write\");\n-\t\tpr_cont(\")\");\n+\t\tlen += scnprintf(buf + len, sizeof(buf) - len, \" kmsg(%s%s)\",\n+\t\t\t kmsg_dump_reason_str(cxt->pstore.max_reason),\n+\t\t\t cxt->pstore_zone_info->panic_write ? \",panic_write\" : \"\");\n \t}\n \tif (info->pmsg_size) {\n \t\tcxt->pstore.flags |= PSTORE_FLAGS_PMSG;\n-\t\tpr_cont(\" pmsg\");\n+\t\tlen += scnprintf(buf + len, sizeof(buf) - len, \" pmsg\");\n \t}\n \tif (info->console_size) {\n \t\tcxt->pstore.flags |= PSTORE_FLAGS_CONSOLE;\n-\t\tpr_cont(\" console\");\n+\t\tlen += scnprintf(buf + len, sizeof(buf) - len, \" console\");\n \t}\n \tif (info->ftrace_size) {\n \t\tcxt->pstore.flags |= PSTORE_FLAGS_FTRACE;\n-\t\tpr_cont(\" ftrace\");\n+\t\tlen += scnprintf(buf + len, sizeof(buf) - len, \" ftrace\");\n \t}\n-\tpr_cont(\"\\n\");\n+\n+\tpr_info(\"registered %s as backend for%s\\n\", info->name, buf);\n \n \terr = pstore_register(&cxt->pstore);\n \tif (err) {\n", "prefixes": [] }