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CPU of qemu-system-aarch64 always stuck
I started qemu with these arguments:
qemu-system-aarch64 -M virt-2.9 -cpu cortex-a72 -smp cores=8,threads=1,sockets=1 -m 2G -device nec-usb-xhci -device usb-kbd -device usb-tablet -pflash /sdcard/QEMU_EFI.img -pflash /sdcard/QEMU_VARS.img -device virtio-blk-device,drive=Ubuntu -drive if=none,id=Ubuntu,file=Ubuntu.vhd -nographic -net user -net nic,model=rtl8139 -kernel linux -initrd initrd.gz
The setup program of Ubuntu devel aarch64 ran normally.But after several hours,the CPUs emulated by qemu-system-aarch64 went wrong.
Here are the messages displayed on the tty
[15842.164745] watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [ksoftirqd/0:9] [15930.163589] watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [ksoftirqd/0:9]
[16110.163540] watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [ksoftirqd/0:9]
[16290.162801] watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [ksoftirqd/0:9]
[16470.163927] watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [ksoftirqd/0:9]
[16650.163246] watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [ksoftirqd/0:9]
[16830.163216] watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [ksoftirqd/0:9]
[17010.164504] watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [ksoftirqd/0:9]
Then I tried CentOS 7.1908 aarch64 with almost the same arguments.
After several hours,it went wrong too.
[17480 . 201 1 58] rcu : (3 ticks this GP) idle=362/0/0x3 softirq=61631 /61 631 fqs=10077
[17480 . 204889] (detected by 3 , t=24007 jiffies , g=218453 , q=5285) [1 7480 . 21 7986] Task dump for CPU 7 :
[17480.222379] swapper/7R running task 0
0 0x0000002a [17480.229073] Call trace :
[1 7480.241518] switch t0+0x104/0x1 f8
[17480.249839] Ox7fffffffffffffff
[17660.232314] rcu : INFO: rcu sched detected stalls on CPUs/ tasks :
[17660.233580] rcu : (3 ticks this GP) idle=362/0/0x3 softirq=61631 /61 631 fqs=17770
[17660.235837] (detected by 3,t=42012 jiffies , g=218453 , q=7039)
[17660 . 237955] Task dump for CPU 7 :
[17660.238900] swapper/ 7 R running task 0 0
[17660.242967] Call trace :
[17660.246192] switch t0+0x104/0x1 f8
[17660.253215] Ox7fffffffffffffff
Obviously qemu-system-aarch64 caused these bugs.
qemu version: 4.x(I have tested version 4.0 & 4.1.0 & 4.2.0)
host architecture: aarch64(Qualcomm Snapdragon series)
host system:Ubuntu devel 20.04& Debian 10(I have tested on many devices)
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