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Fri, 19 Jun 2026 22:00:06 +0000 (GMT) Received: from Linuxdev (unknown [9.43.77.5]) by smtpav07.fra02v.mail.ibm.com (Postfix) with ESMTP; Fri, 19 Jun 2026 22:00:06 +0000 (GMT) From: Madhavan Srinivasan To: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, Shivang Upadhyay Cc: mpe@ellerman.id.au, npiggin@gmail.com, chleroy@kernel.org, kees@kernel.org, tony.luck@intel.com, gpiccoli@igalia.com, ritesh.list@gmail.com, rppt@kernel.org, Hari Bathini , Mahesh Salgaonkar , Shirisha G , Sourabh Jain Subject: Re: [PATCH v2] ppc/fadump: invoke kmsg_dump in fadump panic path Date: Sat, 20 Jun 2026 03:29:48 +0530 Message-ID: <178190618792.653308.14718990774482559384.b4-ty@linux.ibm.com> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260412113057.46090-1-shivangu@linux.ibm.com> References: <20260412113057.46090-1-shivangu@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Proofpoint-GUID: LEOAJc0oWEsgmnbBdRgzx-5_cE1wVz1V X-Authority-Analysis: v=2.4 cv=Le0MLDfi c=1 sm=1 tr=0 ts=6a35bbee cx=c_pps a=AfN7/Ok6k8XGzOShvHwTGQ==:117 a=AfN7/Ok6k8XGzOShvHwTGQ==:17 a=IkcTkHD0fZMA:10 a=FelO9ux0wxsA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=RzCfie-kr_QcCd8fBx8p:22 a=VwQbUJbxAAAA:8 a=o0yxbJjfz1-Qail0h0YA:9 a=QEXdDO2ut3YA:10 X-Proofpoint-Spam-Info: AW1haW4tMjYwNjE5MDIxMCBTYWx0ZWRfX+656LQCXmfBu L7+Os6RdSbRvYaj4u7kiLp1dDSCUpbMyGz2ONvPvYcjhDYQjNi+Iyf/BaXdt++pw9O6tx46fs0r V2KF9EcFqH8TSpB7ZiXG5SpgR3LANBI= X-Proofpoint-ORIG-GUID: lf2qDui7G6yblG5usyXgIx1bhUh1m78_ X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNjE5MDIxMCBTYWx0ZWRfXwHyM/viRuoNQ 2HxSOFtBxiAUgzNeMNobE9JqhBa3b6mf0b7Z6nz2CYF2dC7ZF1w6yS8ITX+0ASmgdI1eH8nk/Q5 8jknlwAQjKBERDx7mK9yBJ0B//2aHDwjdQ1PuoethvNBEqHH05N0p+JNXiYxKHzUeuMfQ89UEwO rjX+S7N4wHgwOT84ekdveNPb4VXJNHYrRmmU/Rd3z6UlnVs339wHSA6IAvBhFy51yGmqd1h8Awd T3HCmLl3Csy5w3EUD3GT9D7PHX4GINtzcvXEB112zWMy0UeBYIXCU/6ihFUOd8xFEv/C9LWhDzL tQvb4HAQ23Jq8Qzp9fQPILHNKSfig+HX05xfGlhBTh2S3TBpdvwT9YkX+gvqdTVjIkvYBinMQJs bbBzsa7CjyMlGAas/ThFrGOUZCKrHYNGsJ5CFltB6pwLLgIhs8UWID60eNRzPffWf+0KLspDGPD 9gtud95v1GvLboHDKpQ== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.125,FMLib:17.12.100.49 definitions=2026-06-19_05,2026-06-18_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1011 priorityscore=1501 malwarescore=0 spamscore=0 suspectscore=0 impostorscore=0 phishscore=0 lowpriorityscore=0 bulkscore=0 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2606190210 On Sun, 12 Apr 2026 17:00:57 +0530, Shivang Upadhyay wrote: > fadump is registered in panic_notifier_list and gets triggered before > kmsg_dump_desc() in the panic path. As a result, kmsg_dumpers such as > pstore are not executed during fadump crashes. > > This is problematic because pstore provides a critical fallback mechanism > for crash analysis. When fadump fails to successfully reboot the system > or capture a dump, pstore logs may be the only available information from > the crashed kernel. Without invoking kmsg_dump_desc() in the fadump path, > we lose this valuable diagnostic data. > > [...] Applied to powerpc/next. [1/1] ppc/fadump: invoke kmsg_dump in fadump panic path https://git.kernel.org/powerpc/c/6ed8332639853b77329594a241eb99fc36d591a2 cheers