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Tue, 7 Jul 2026 04:29:04 +0000 (GMT) Message-ID: <18acdffe-a06b-4bfa-bbf6-e38274700b04@linux.ibm.com> Date: Tue, 7 Jul 2026 09:59:03 +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: Re: [PATCH v5 0/8] Generic IRQ entry/exit support for powerpc To: Andreas Schwab , "Christophe Leroy (CS GROUP)" Cc: "Mukesh Kumar Chaurasiya (IBM)" , maddy@linux.ibm.com, mpe@ellerman.id.au, npiggin@gmail.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, oleg@redhat.com, kees@kernel.org, luto@amacapital.net, wad@chromium.org, mchauras@linux.ibm.com, thuth@redhat.com, ruanjinjie@huawei.com, akpm@linux-foundation.org, macro@orcam.me.uk, ldv@strace.io, charlie@rivosinc.com, deller@gmx.de, kevin.brodsky@arm.com, ritesh.list@gmail.com, yeoreum.yun@arm.com, agordeev@linux.ibm.com, segher@kernel.crashing.org, mark.rutland@arm.com, ryan.roberts@arm.com, pmladek@suse.com, feng.tang@linux.alibaba.com, peterz@infradead.org, kan.liang@linux.intel.com, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com References: <20260427122742.210074-1-mkchauras@gmail.com> <87wlvazrdy.fsf@igel.home> <1693b268-ee26-4764-871a-5a067ae96080@kernel.org> <877bn9vfd4.fsf@igel.home> Content-Language: en-US From: Shrikanth Hegde In-Reply-To: <877bn9vfd4.fsf@igel.home> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Authority-Analysis: v=2.4 cv=Q/XiJY2a c=1 sm=1 tr=0 ts=6a4c809e cx=c_pps a=aDMHemPKRhS1OARIsFnwRA==:117 a=aDMHemPKRhS1OARIsFnwRA==:17 a=IkcTkHD0fZMA:10 a=RAioF0-LDSMA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=Y2IxJ9c9Rs8Kov3niI8_:22 a=aoHAD-nEe2P4sfjmd58A:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 X-Proofpoint-GUID: nkTS0WiPD9ZF7Lh3uvPuU8g-5SXxPiis X-Proofpoint-ORIG-GUID: 0AJT3fxolVd1Rb-Fz5cRiTc9rGwb953g X-Proofpoint-Spam-Info: AW1haW4tMjYwNzA3MDAzNyBTYWx0ZWRfXwa1SzJqlzJuO mR8VlfSdefXV4RKl5hULc6Uj8JGrJUC5Capri7AWMsMxRLotqqRDI3deMRZWwFunKvnkdHZ1FO7 XFaNOCkkY4Yef0BdUMkYPEoEXSHmkO0= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzA3MDAzNyBTYWx0ZWRfX+DyJJW+LAQIQ lA1Iz418kGuRxLEzDm7hZ2z9epgs5SBBhmn/l7XGlr92uRrFnU4sfrqJAoBv2v+GfqnfztU9Hls Oq0xakK+qLFFZgyoHKywc3xgr5f8LmpvbQN4elKLQVEwy/t7HgD+IWozYu5+j2aVEgP+pLdTTQ8 gjuWi14jGdX8OCZBMG7ZI95n2x9hevAjjXGL0z4r5uFmJy2KfikAau9KHGWYEqhVMO+BO9pJvda L6zyqb1VGI2l+qNHCcm9P4/kn9ULZGZy0ANsUMVRgWUweSkkKX2Rsv/FaVONKp/Xn1OeKB/imYc eXaeetff+7EuReFWfioTb8PEXuH6MORUdJb3cJoJrY6xt0IVx2BhE2IxMSCfHOYboSfb1I6APHN 3HJ7UzKnRchiwmIA6E8xe1tA2fnXNxCgq/OsfX5p0koy3d8ff+UyYa6FEi3OpT35xoP3u8tqdJ0 sLiy29Povsc79tkiBqA== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-07-07_01,2026-07-06_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 impostorscore=0 spamscore=0 phishscore=0 priorityscore=1501 bulkscore=0 clxscore=1015 lowpriorityscore=0 suspectscore=0 malwarescore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607070037 On 7/5/26 5:05 PM, Andreas Schwab wrote: > On Jul 05 2026, Christophe Leroy (CS GROUP) wrote: > >> Le 04/07/2026 à 17:49, Andreas Schwab a écrit : >>> This breaks booting on the PowerMac G5 (PowerMac7,3), there is a panic >>> somwhere in an irq. >>> >> >> Do you have more details ? Like at least the dump of the panic Oops ? > > NIP .power4_idle_nap+0x30/0x34 > LR .power4_idle+0x64/0x70 > --- interrupt: 900 > > .arch_spu_idle+0x88/0x100 > .default_idle_call+0x3c/0x5c > .do_idle+0x194/0x2b4 > .cpu_startup_entry+0x3c/0x40 > .start_secondary+0x6b0/0x820 > start_secondary_prolog+0x10/0x14 > >> Can it be reproduced on QEMU ? > > No, qemu does not support SMP. > Can you try "powersave=off" commandline to disable idlestate and see if it boots? Other call stacks are very likely not possible such as sched_balance_find_src_group