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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)
-
-The QEMU project is currently considering to move its bug tracking to
-another system. For this we need to know which bugs are still valid
-and which could be closed already. Thus we are setting older bugs to
-"Incomplete" now.
-
-If you still think this bug report here is valid, then please switch
-the state back to "New" within the next 60 days, otherwise this report
-will be marked as "Expired". Or please mark it as "Fix Released" if
-the problem has been solved with a newer version of QEMU already.
-
-Thank you and sorry for the inconvenience.
-
-
-[Expired for QEMU because there has been no activity for 60 days.]
-