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graphic: 0.701
device: 0.489
mistranslation: 0.472
semantic: 0.387
other: 0.345
network: 0.323
instruction: 0.261
socket: 0.244
vnc: 0.204
KVM: 0.099
assembly: 0.078
boot: 0.070
[BUG][CPU hot-plug]CPU hot-plugs cause the qemu process to coredump
Hello,Recently, when I was developing CPU hot-plugs under the loongarch
architecture,
I found that there was a problem with qemu cpu hot-plugs under x86
architecture,
which caused the qemu process coredump when repeatedly inserting and
unplugging
the CPU when the TCG was accelerated.
The specific operation process is as follows:
1.Use the following command to start the virtual machine
qemu-system-x86_64 \
-machine q35Â \
-cpu Broadwell-IBRS \
-smp 1,maxcpus=4,sockets=4,cores=1,threads=1 \
-m 4G \
-drive file=~/anolis-8.8.qcow2Â \
-serial stdio  \
-monitor telnet:localhost:4498,server,nowait
2.Enter QEMU Monitor via telnet for repeated CPU insertion and unplugging
telnet 127.0.0.1 4498
(qemu) device_add
Broadwell-IBRS-x86_64-cpu,socket-id=1,core-id=0,thread-id=0,id=cpu1
(qemu) device_del cpu1
(qemu) device_add
Broadwell-IBRS-x86_64-cpu,socket-id=1,core-id=0,thread-id=0,id=cpu1
3.You will notice that the QEMU process has a coredump
# malloc(): unsorted double linked list corrupted
Aborted (core dumped)
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