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files: 0.843
graphic: 0.817
device: 0.727
performance: 0.606
semantic: 0.586
ppc: 0.507
network: 0.465
hypervisor: 0.431
vnc: 0.402
debug: 0.382
risc-v: 0.377
peripherals: 0.344
PID: 0.329
user-level: 0.314
kernel: 0.299
VMM: 0.280
i386: 0.272
socket: 0.271
x86: 0.269
architecture: 0.268
arm: 0.261
KVM: 0.259
TCG: 0.246
boot: 0.209
mistranslation: 0.171
permissions: 0.171
register: 0.170
virtual: 0.152
assembly: 0.086
[7.2.0] Qemu process hang with `defunct` when using `-blockdev` json property which file doesn't exists
Description of problem:
When using `throttle` and `throttle-group` to apply block device QOS,
there is something wrong with check file exists validation.
In upper commands, if the file which located `/mnt/b3b8dfb5-0a7c-4285-81d8-2bf8d33a3297/32c55f5a-96d1-4af4-a149-c95fd6652e3e/b016af76-f6b1-4614-b29a-78917924e55e` doesn't exist, it just hang with `defunct` process.
Steps to reproduce:
1. Start Guest with upper command.
2. Hanged with defunct process
3.
Additional information:
- With GDB stack, i can find `no such file` error, but process don't exit
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