On Thu, Oct 31 2024 at 14:10, Naresh Kamboju wrote:
The QEMU-ARM64 boot has failed with the Linux next-20241031 tag. The boot log shows warnings at clockevents_register_device and followed by rcu_preempt detected stalls.
However, the system did not proceed far enough to reach the login prompt. The fvp-aemva, Qemu-arm64, Qemu-armv7 and Qemu-riscv64 boot failed.
Please find the incomplete boot log links below for your reference. The Qemu version is 9.0.2. <4>[ 0.220657] WARNING: CPU: 1 PID: 0 at kernel/time/clockevents.c:455 clockevents_register_device (kernel/time/clockevents.c:455 <4>[ 0.225218] clockevents_register_device+0x170/0x188 P <4>[ 0.225367] clockevents_config_and_register+0x34/0x50 L <4>[ 0.225487] clockevents_config_and_register (kernel/time/clockevents.c:523) <4>[ 0.225553] arch_timer_starting_cpu (drivers/clocksource/arm_arch_timer.c:1034) <4>[ 0.225602] cpuhp_invoke_callback (kernel/cpu.c:194) <4>[ 0.225649] __cpuhp_invoke_callback_range (kernel/cpu.c:965) <4>[ 0.225691] notify_cpu_starting (kernel/cpu.c:1604)
That's obvious what happens here. notify_cpu_starting() is invoked before the CPU is marked online, which triggers the new check in clockevents_register_device().
I removed the warning and force pushed the fixed up branch, so that should be gone by tomorrow.
Thanks,
tglx