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charset="us-ascii" Content-Disposition: inline Hello, this report is just FYI what we observed in our tests. from commit message, it seems to us it should only impact arm or arm64, however, we rebuild the kernel for this commit and parent several times, rerun tests and the issues are quite persistent while parent keeps clean. ========================================================================================= tbox_group/testcase/rootfs/kconfig/compiler/runtime/test/torture_type: vm-snb-i386/rcutorture/debian-11.1-i386-20220923.cgz/i386-randconfig-2006-20250804/gcc-14/300s/cpuhotplug/srcud a594dec7607744a8 9f0cb91767f582df6b17c1e2f22 ---------------- --------------------------- fail:runs %reproduction fail:runs | | | :200 100% 200:200 last_state.booting :200 100% 200:200 last_state.is_incomplete_run :200 90% 179:200 dmesg.BUG:kernel_hang_in_boot_stage :200 10% 21:200 dmesg.BUG:workqueue_lockup-pool :200 2% 5:200 dmesg.EIP:_raw_spin_unlock_irq :200 1% 2:200 dmesg.EIP:finish_task_switch :200 0% 1:200 dmesg.EIP:get_recent_times :200 2% 3:200 dmesg.EIP:lock_acquire :200 0% 1:200 dmesg.EIP:lock_release :200 0% 1:200 dmesg.EIP:preempt_schedule_irq :200 1% 2:200 dmesg.EIP:rcu_preempt_deferred_qs_irqrestore :200 100% 200:200 dmesg.boot_failures the config used to build both commit/parent is uploaded to https://download.01.org/0day-ci/archive/20251015/202510150626.636464df-lkp@intel.com/config-6.16.0-rc7-00008-g9f0cb91767f5 there is no CONFIG_HAVE_EXTRA_IPI_TRACEPOINTS. though this really caused code difference between commit and parent while compiling, we don't have enough knowledge how to connect to the issues. another thing is most runs have dmesg.BUG:kernel_hang_in_boot_stage, which has little hints in dmesg as below [1] which is uploaded by bot automatically to https://download.01.org/0day-ci/archive/20251015/202510150626.636464df-lkp@intel.com/dmesg.xz we also noticed in some runs (~10%) there are issues of "dmesg.BUG:workqueue_lockup-pool" though still don't see the connection, attached one dmesg FYI dmesg-9f0cb91767-workqueue_lockup-pool.xz below is full report. kernel test robot noticed "BUG:kernel_hang_in_boot_stage" on: commit: 9f0cb91767f582df6b17c1e2f22f684c36962295 ("tracing: arm: arm64: Hide trace events ipi_raise, ipi_entry and ipi_exit") https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master [test failed on linus/master 0d97f2067c166eb495771fede9f7b73999c67f66] [test failed on linux-next/master 68842969e138d9ad3e3aa2bbd65d514df1581b5c] in testcase: rcutorture version: with following parameters: runtime: 300s test: cpuhotplug torture_type: srcud config: i386-randconfig-2006-20250804 compiler: gcc-14 test machine: qemu-system-i386 -enable-kvm -cpu SandyBridge -smp 2 -m 4G (please refer to attached dmesg/kmsg for entire log/backtrace) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-lkp/202510150626.636464df-lkp@intel.com [1] [ 0.367885][ T0] x86/fpu: Supporting XSAVE feature 0x001: 'x87 floating point registers' [ 0.369051][ T0] x86/fpu: Supporting XSAVE feature 0x002: 'SSE registers' [ 0.370006][ T0] x86/fpu: Supporting XSAVE feature 0x004: 'AVX registers' [ 0.373610][ T0] x86/fpu: xstate_offset[2]: 576, xstate_sizes[2]: 256 [ 0.378001][ T0] x86/fpu: Enabled xstate features 0x7, context size is 832 bytes, using 'standard' format. 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