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Fri, 15 May 2026 05:29:57 +0000 (GMT) Received: from [9.61.247.83] (unknown [9.61.247.83]) by smtpav01.dal12v.mail.ibm.com (Postfix) with ESMTP; Fri, 15 May 2026 05:29:56 +0000 (GMT) Message-ID: Date: Fri, 15 May 2026 10:59:55 +0530 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: =?UTF-8?Q?Re=3A_=5Bmainline=5D_powerpc/TM=3A_Unexpected_TM_Bad_Thin?= =?UTF-8?Q?g_during_core_dump_on_POWER9_=287=2E1=E2=80=91rc1=29?= From: Venkat Rao Bagalkote To: linuxppc-dev , Madhavan Srinivasan Cc: LKML , Christophe Leroy References: <364996ce-aba2-4213-8d20-7dd481b43fe6@linux.ibm.com> Content-Language: en-GB In-Reply-To: <364996ce-aba2-4213-8d20-7dd481b43fe6@linux.ibm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: uP4dnc6RwQYcAzrr_oZFpRSHwsTyigzg X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNTE1MDA0OCBTYWx0ZWRfX2qd/Z10AKm9f N07dbptnmXc3KBAWZ5slVhbnCW5AUF7r43byGE7r39CQl3Du5v9Mz791TXQbBT+5IlOxsNeV+3G klC56rj4w/oOYiGDllxFRWO7L+94wWQbAjYVBdzNXJq+uU6O5jppTYgCkGEIb2kOu6OtPXZ0Oef tZrChBpTDyIN6RQr43EgutjtSROe6JJJU5HFNa7603fbFmX4mgYAHaZvjP9Qf0a8XVFpxdyRSJc rrQoRIK4ZUuOdd8RCCBDvh7BJMD3czMf/qsTlW62Tind6MoUYsLlW8DjF55Ln2C6FodARkoPsKT dNaZu9cQ0cUSUCqckPbLSEltxqqjZQXDNKAd2g+akD3c/ineLQ8h9GJE0C1MxBNhy6jyTzyuPxK TX2ewCxQhbGkEZrZND9zgWdwrU3hQ+a66lw5I3XCklGI+A91PmNfFlRD2QgpM1kGBIkhDYFJfty NlZkV7yqD+sXhnfLDfA== X-Authority-Analysis: v=2.4 cv=ZZEt8MVA c=1 sm=1 tr=0 ts=6a06af58 cx=c_pps a=GFwsV6G8L6GxiO2Y/PsHdQ==:117 a=GFwsV6G8L6GxiO2Y/PsHdQ==:17 a=IkcTkHD0fZMA:10 a=NGcC8JguVDcA:10 a=5KLPUuaC_9wA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=uAbxVGIbfxUO_5tXvNgY:22 a=VnNF1IyMAAAA:8 a=wohju4B2r2WM4v6AVBMA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 X-Proofpoint-GUID: uP4dnc6RwQYcAzrr_oZFpRSHwsTyigzg X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-05-15_01,2026-05-13_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 priorityscore=1501 malwarescore=0 bulkscore=0 impostorscore=0 phishscore=0 spamscore=0 lowpriorityscore=0 suspectscore=0 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2605130000 definitions=main-2605150048 On 28/04/26 5:48 pm, Venkat Rao Bagalkote wrote: > Greetings!! > > IBM CI has reported a kernel crash while running > selftests/powerpc/signal on a POWER9 pSeries system. > > I attempted to reproduce this issue manually, but was not successful > so far. I’m now able to reproduce this issue reliably and consistently. The reproduction steps are simple: Run selftests/powerpc/signal Regards, Venkat. > > Below are the details of the crash as reported by CI. > > Crash Details: > > [ 9798.880148] Unexpected TM Bad Thing exception at c00000000000dbac >                (msr 0x8000000302a03031) tm_scratch=800000010280b033 > [ 9798.880160] Oops: Unrecoverable exception, sig: 6 [#1] > [ 9798.880165] LE PAGE_SIZE=64K MMU=Hash SMP NR_CPUS=8192 NUMA pSeries > [ 9798.880173] Modules linked in: nvram(E) rpadlpar_io(E) rpaphp(E) ... > [ 9798.880233] CPU: 8 UID: 0 PID: 1039530 Comm: sigfuz >                Tainted: G            E       7.1.0-rc1 #1 PREEMPT > [ 9798.880245] Hardware name: IBM,8375-42A POWER9 (architected) >                hv:phyp pSeries > [ 9798.880251] NIP:  c00000000000dbac LR: 0000000010001e58 > [ 9798.880262] MSR:  8000000302a03031 > > > Call Trace: > > > NIP [c00000000000dbac] interrupt_return_srr_kernel+0x15c/0x18c > Call Trace: >  tm_reclaim_thread >  flush_tmregs_to_thread >  vsr_get >  regset_get_alloc >  fill_thread_core_info.isra.0 >  fill_note_info >  elf_core_dump >  coredump_write >  do_coredump >  vfs_coredump >  get_signal >  do_signal >  do_notify_resume >  interrupt_exit_user_prepare_main >  interrupt_exit_user_prepare >  interrupt_return_srr_user > > > Please let me know if further details are required. > > > If you happen to fix this issue, please add below tag. > > Reported-by: Venkat Rao Bagalkote > > > > Regards, > > Venkat. > >