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GET /api/1.2/patches/2222501/?format=api
{ "id": 2222501, "url": "http://patchwork.ozlabs.org/api/1.2/patches/2222501/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260412113057.46090-1-shivangu@linux.ibm.com/", "project": { "id": 2, "url": "http://patchwork.ozlabs.org/api/1.2/projects/2/?format=api", "name": "Linux PPC development", "link_name": "linuxppc-dev", "list_id": "linuxppc-dev.lists.ozlabs.org", "list_email": "linuxppc-dev@lists.ozlabs.org", "web_url": "https://github.com/linuxppc/wiki/wiki", "scm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git", "webscm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/", "list_archive_url_format": "https://lore.kernel.org/linuxppc-dev/{}/", "commit_url_format": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?id={}" }, "msgid": "<20260412113057.46090-1-shivangu@linux.ibm.com>", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/20260412113057.46090-1-shivangu@linux.ibm.com/", "date": "2026-04-12T11:30:57", "name": "[v2] ppc/fadump: invoke kmsg_dump in fadump panic path", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "9d8e2f06f9457322fc28a8919e21b65344767745", "submitter": { "id": 91952, "url": "http://patchwork.ozlabs.org/api/1.2/people/91952/?format=api", "name": "Shivang Upadhyay", "email": "shivangu@linux.ibm.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260412113057.46090-1-shivangu@linux.ibm.com/mbox/", "series": [ { "id": 499597, "url": "http://patchwork.ozlabs.org/api/1.2/series/499597/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=499597", "date": "2026-04-12T11:30:57", "name": "[v2] ppc/fadump: invoke kmsg_dump in fadump panic path", "version": 2, "mbox": "http://patchwork.ozlabs.org/series/499597/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2222501/comments/", "check": "success", "checks": "http://patchwork.ozlabs.org/api/patches/2222501/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linuxppc-dev+bounces-19657-incoming=patchwork.ozlabs.org@lists.ozlabs.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linuxppc-dev@lists.ozlabs.org" ], "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256\n header.s=pp1 header.b=Nnc0ThNe;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org\n (client-ip=2404:9400:21b9:f100::1; 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lists.ozlabs.org;\n dmarc=pass (p=none dis=none) header.from=linux.ibm.com;\n dkim=pass (2048-bit key;\n unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256\n header.s=pp1 header.b=Nnc0ThNe; dkim-atps=neutral;\n spf=pass (client-ip=148.163.158.5; helo=mx0b-001b2d01.pphosted.com;\n envelope-from=shivangu@linux.ibm.com;\n receiver=lists.ozlabs.org) smtp.mailfrom=linux.ibm.com", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=cc\n\t:content-transfer-encoding:date:from:message-id:mime-version\n\t:subject:to; s=pp1; bh=XM5wDcj1k25RA0EBnRvrSb7gbfUdR4j3rsxxhwvBU\n\tiY=; b=Nnc0ThNetnszIhhPSu8p1+iSTIP//AXQ3eV1zjq1OffJVEKip3zzfRkn3\n\t5yBSFUAULoLx5yJXqZo7jTNo/h6pnQcFJ1IvFj7HlwsOyVuxHk5SKRbQNiJ69dxk\n\tY0dBgZmgva/eJBU6e+HEK8BSwzyZVragiDxar06APC5Zt8XdGSWKVh7czue3sewP\n\tYBgs+Pv8ajlrwpAR6DSF8uZWIpZnhxPjpKrj3lHBzieDJ5EwLdj42nTtOAETn1b/\n\ts1eTvqDHphzXt+l4R01bHMD1vDqW1P9Hv0ScRj3mklGffAg/OsXPmIaOGuPtvjKr\n\tiSM+DWE1VSoVjrIsS+cO4vodnUFiQ==", "From": "Shivang Upadhyay <shivangu@linux.ibm.com>", "To": "linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org", "Cc": "maddy@linux.ibm.com, mpe@ellerman.id.au, npiggin@gmail.com,\n chleroy@kernel.org, kees@kernel.org, tony.luck@intel.com,\n gpiccoli@igalia.com, ritesh.list@gmail.com, rppt@kernel.org,\n Shivang Upadhyay <shivangu@linux.ibm.com>,\n Hari Bathini <hbathini@linux.ibm.com>,\n Mahesh Salgaonkar <mahesh@linux.ibm.com>,\n Shirisha G <shirisha@linux.ibm.com>,\n Sourabh Jain <sourabhjain@linux.ibm.com>", "Subject": "[PATCH v2] ppc/fadump: invoke kmsg_dump in fadump panic path", "Date": "Sun, 12 Apr 2026 17:00:57 +0530", "Message-ID": "<20260412113057.46090-1-shivangu@linux.ibm.com>", "X-Mailer": "git-send-email 2.53.0", "X-Mailing-List": "linuxppc-dev@lists.ozlabs.org", "List-Id": "<linuxppc-dev.lists.ozlabs.org>", "List-Help": "<mailto:linuxppc-dev+help@lists.ozlabs.org>", "List-Owner": "<mailto:linuxppc-dev+owner@lists.ozlabs.org>", "List-Post": "<mailto:linuxppc-dev@lists.ozlabs.org>", "List-Archive": "<https://lore.kernel.org/linuxppc-dev/>,\n <https://lists.ozlabs.org/pipermail/linuxppc-dev/>", "List-Subscribe": "<mailto:linuxppc-dev+subscribe@lists.ozlabs.org>,\n <mailto:linuxppc-dev+subscribe-digest@lists.ozlabs.org>,\n <mailto:linuxppc-dev+subscribe-nomail@lists.ozlabs.org>", "List-Unsubscribe": "<mailto:linuxppc-dev+unsubscribe@lists.ozlabs.org>", "Precedence": "list", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-TM-AS-GCONF": "00", "X-Proofpoint-Reinject": "loops=2 maxloops=12", "X-Proofpoint-Spam-Details-Enc": "AW1haW4tMjYwNDEyMDEwOSBTYWx0ZWRfX+A3DUCKDbbML\n oaLKSg7lJ5S4RkJxVUux6v25d5urZLDgr4dHmli2/BPP/VaSDcE3dj1hk+7Ix+L8ZtPJ0P6blYj\n 5XTE8s9VR50zaswgxXPND0IJnqq+2oPkLZjM3rLX5n4bGhGXBmXP92LPjkAWHgMQwhXX52Piwvk\n bZDJG9FAxLOLSf5QhKXGnKNA9VtjwiaTo3PsYopjwzmI0Xpre2le0lplOmOge1axRdT9s9K8VE1\n nwGwssp3V9UP2/ovjQ1VaRlz210jS/57QTRx6+xXz2JaRYw1OYPrKET9NDlWdJv3VM/4FSfRE1n\n yD7kGCSgpmJi0JCkoTTnbOglzREPDBxax9A6+mgg5f0fYQyKMcYk3oTIl1UAtuy2loqFSnY+SfF\n eUmi+oGlKfRxB5rmpVpE0Zmu1NABgfydoq6RZB/+o9G96olqgii1jk56wRp4Pwx1fRPv8Shg62z\n r/ZJhm3dO0FaaE16mJQ==", "X-Proofpoint-ORIG-GUID": "JE8r2Vi0-32O3uLZhHk8y7ybrW57zYQR", "X-Authority-Analysis": "v=2.4 cv=TId1jVla c=1 sm=1 tr=0 ts=69db827f cx=c_pps\n a=3Bg1Hr4SwmMryq2xdFQyZA==:117 a=3Bg1Hr4SwmMryq2xdFQyZA==:17\n a=A5OVakUREuEA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22\n a=RzCfie-kr_QcCd8fBx8p:22 a=VwQbUJbxAAAA:8 a=VnNF1IyMAAAA:8 a=pGLkceISAAAA:8\n a=wpMxpv9DbCWzPGTgfgQA:9", "X-Proofpoint-GUID": "wYDc3eL1nJlKq2cNdMIHGqURCzZqelb5", "X-Proofpoint-Virus-Version": "vendor=baseguard\n engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49\n definitions=2026-04-12_02,2026-04-09_02,2025-10-01_01", "X-Proofpoint-Spam-Details": "rule=outbound_notspam policy=outbound score=0\n bulkscore=0 malwarescore=0 spamscore=0 adultscore=0 phishscore=0\n suspectscore=0 priorityscore=1501 impostorscore=0 clxscore=1015\n lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc=\n route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604010000\n definitions=main-2604120109", "X-Spam-Status": "No, score=-0.7 required=3.0 tests=DKIM_SIGNED,DKIM_VALID,\n\tRCVD_IN_DNSWL_LOW,RCVD_IN_MSPIKE_H4,RCVD_IN_MSPIKE_WL,SPF_HELO_NONE,\n\tSPF_PASS autolearn=disabled version=4.0.1 OzLabs 8", "X-Spam-Checker-Version": "SpamAssassin 4.0.1 (2024-03-25) on lists.ozlabs.org" }, "content": "fadump is registered in panic_notifier_list and gets triggered before\nkmsg_dump_desc() in the panic path. As a result, kmsg_dumpers such as\npstore are not executed during fadump crashes.\n\nThis is problematic because pstore provides a critical fallback mechanism\nfor crash analysis. When fadump fails to successfully reboot the system\nor capture a dump, pstore logs may be the only available information from\nthe crashed kernel. Without invoking kmsg_dump_desc() in the fadump path,\nwe lose this valuable diagnostic data.\n\nInvoke kmsg_dump_desc() from the fadump panic handler, but only when\nfadump is actually registered (checked via should_fadump_crash()). This\nensures kmsg_dumpers are called without duplicating the call that occurs\nlater in panic() when fadump is not active.\n\nThe call is placed before crash_fadump() to ensure logs are captured\nbefore the system attempts to trigger the firmware-assisted dump.\n\nCc: Hari Bathini <hbathini@linux.ibm.com>\nCc: Madhavan Srinivasan <maddy@linux.ibm.com>\nCc: Mahesh Salgaonkar <mahesh@linux.ibm.com>\nCc: Michael Ellerman <mpe@ellerman.id.au>\nCc: Ritesh Harjani (IBM) <ritesh.list@gmail.com>\nReported-by: Shirisha G <shirisha@linux.ibm.com>\nSuggested-by: Sourabh Jain <sourabhjain@linux.ibm.com>\nSigned-off-by: Shivang Upadhyay <shivangu@linux.ibm.com>\n---\nChangelog:\n\nv2:\n address comments from Sourabh, and sashikio-ai\n added should_fadump_crash()\n\nv1:\n https://lore.kernel.org/all/20260407054341.308710-1-shivangu@linux.ibm.com/\n---\n arch/powerpc/kernel/setup-common.c | 8 ++++++++\n 1 file changed, 8 insertions(+)", "diff": "diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c\nindex b1761909c23f..87afc8003a03 100644\n--- a/arch/powerpc/kernel/setup-common.c\n+++ b/arch/powerpc/kernel/setup-common.c\n@@ -68,6 +68,7 @@\n #include <asm/kasan.h>\n #include <asm/mce.h>\n #include <asm/systemcfg.h>\n+#include <linux/kmsg_dump.h>\n \n #include \"setup.h\"\n \n@@ -744,6 +745,13 @@ static int ppc_panic_fadump_handler(struct notifier_block *this,\n \t */\n \thard_irq_disable();\n \n+\t/*\n+\t * Invoke kmsg_dump (e.g., pstore) before crash_fadump() as fadump\n+\t * runs before panic()'s kmsg_dump_desc() call.\n+\t */\n+\tif (should_fadump_crash())\n+\t\tkmsg_dump_desc(KMSG_DUMP_PANIC, (char *)ptr);\n+\n \t/*\n \t * If firmware-assisted dump has been registered then trigger\n \t * its callback and let the firmware handles everything else.\n", "prefixes": [ "v2" ] }