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[92.21.193.245]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-46e2ab62233sm231205825e9.21.2025.09.29.07.37.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 29 Sep 2025 07:37:41 -0700 (PDT) Date: Mon, 29 Sep 2025 15:37:39 +0100 From: Juri Lelli To: Pingfan Liu Cc: linux-kernel@vger.kernel.org, Ingo Molnar , Peter Zijlstra , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Valentin Schneider Subject: Re: [PATCH] sched/deadline: Derive root domain from active cpu in task's cpus_ptr Message-ID: References: <20250929133602.32462-1-piliu@redhat.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=us-ascii Content-Disposition: inline In-Reply-To: <20250929133602.32462-1-piliu@redhat.com> Hello! On 29/09/25 21:36, Pingfan Liu wrote: > When testing kexec-reboot on a 144 cpus machine with > isolcpus=managed_irq,domain,1-71,73-143 in kernel command line, I > encounter the following bug: > > [ 97.114759] psci: CPU142 killed (polled 0 ms) > [ 97.333236] Failed to offline CPU143 - error=-16 > [ 97.333246] ------------[ cut here ]------------ > [ 97.342682] kernel BUG at kernel/cpu.c:1569! > [ 97.347049] Internal error: Oops - BUG: 00000000f2000800 [#1] SMP > [ 97.353281] Modules linked in: rfkill sunrpc dax_hmem cxl_acpi cxl_port cxl_core einj vfat fat arm_smmuv3_pmu nvidia_cspmu arm_spe_pmu coresight_trbe arm_cspmu_module rndis_host ipmi_ssif cdc_ether i2c_smbus spi_nor usbnet ast coresight_tmc mii ixgbe i2c_algo_bit mdio mtd coresight_funnel coresight_stm stm_core coresight_etm4x coresight cppc_cpufreq loop fuse nfnetlink xfs crct10dif_ce ghash_ce sha2_ce sha256_arm64 sha1_ce sbsa_gwdt nvme nvme_core nvme_auth i2c_tegra acpi_power_meter acpi_ipmi ipmi_devintf ipmi_msghandler dm_mirror dm_region_hash dm_log dm_mod > [ 97.404119] CPU: 0 UID: 0 PID: 2583 Comm: kexec Kdump: loaded Not tainted 6.12.0-41.el10.aarch64 #1 Could you please confirm this is still reproducible with plain upstream (e5f0a698b34e ("Linux 6.17") as of today)? I just wonder if we might be missing some of the recent fixes around SCHED_DEADLINE. Thanks, Juri