Re: [PATCH RFC V3 00/29] Support of Virtual CPU Hotplug for ARMv8 Arch

[Gavin Shan]

Hi Salil,

With this series and latest upstream Linux kernel (host), I ran into core dump 
as below.
I'm not sure if it's a known issue or not.

# uname -r
6.11.0-rc2-gavin+
# /home/gavin/sandbox/qemu.main/build/qemu-system-aarch64 -accel kvm \
  -machine virt,gic-version=host,nvdimm=on -cpu host                 \
  -smp maxcpus=2,cpus=1,sockets=2,clusters=1,cores=1,threads=1       \
  -m 4096M,slots=16,maxmem=128G                                      \
  -object memory-backend-ram,id=mem0,size=2048M                      \
  -object memory-backend-ram,id=mem1,size=2048M                      \
  -numa node,nodeid=0,memdev=mem0,cpus=0-0                           \
  -numa node,nodeid=1,memdev=mem1,cpus=1-1                           \
    :
qemu-system-aarch64: Failed to initialize host vcpu 1
Aborted (core dumped)

# gdb /var/lib/systemd/coredump/core.0 
/home/gavin/sandbox/qemu.main/build/qemu-system-aarch64
(gdb) bt
#0  0x0000ffff9eec42e8 in __pthread_kill_implementation () at /lib64/libc.so.6
#1  0x0000ffff9ee7c73c in raise () at /lib64/libc.so.6
#2  0x0000ffff9ee69034 in abort () at /lib64/libc.so.6
#3  0x0000aaaac71152c0 in kvm_arm_create_host_vcpu (cpu=0xaaaae4c0cb80)
    at ../target/arm/kvm.c:1093
#4  0x0000aaaac7057520 in machvirt_init (machine=0xaaaae48198c0) at 
../hw/arm/virt.c:2534
#5  0x0000aaaac6b0d31c in machine_run_board_init
    (machine=0xaaaae48198c0, mem_path=0x0, errp=0xfffff754ee38) at 
../hw/core/machine.c:1576
#6  0x0000aaaac6f58d70 in qemu_init_board () at ../system/vl.c:2620
#7  0x0000aaaac6f590dc in qmp_x_exit_preconfig (errp=0xaaaac8911120 
<error_fatal>)
    at ../system/vl.c:2712
#8  0x0000aaaac6f5b728 in qemu_init (argc=82, argv=0xfffff754f1d8) at 
../system/vl.c:3758
#9  0x0000aaaac6a5315c in main (argc=82, argv=0xfffff754f1d8) at 
../system/main.c:47

Thanks,
Gavin