From: Wahaha Huang <kingtan9527@gmail.com>
To: qemu-devel@nongnu.org
Subject: [Qemu-devel] [Block-io] qemu virtual machine get stuck during startup
Date: Thu, 19 Oct 2017 17:32:10 +0800 [thread overview]
Message-ID: <CALMRoie6DWc0B5Q3ZAbSS7ezFC=tXtNW+eU1T_deJsadO06erQ@mail.gmail.com> (raw)
Hi there,
I'm a newbie of qemu(2.10.0), when i start a vm from qemu, it sometimes get
stuck,
through gdb debugging, i found aio_worker thread(list below) missing when
vm get stuck,
but i don't know why, does anybody has further idea about this?
(gdb) info threads
>
> Id Target Id Frame
>
> 1 LWP 25451 "qemu-system-x86" 0x00007fc62081dc8b in ppoll () from
>> /lib/libc.so.6
>
> 2 LWP 25452 "qemu-system-x86" 0x00007fc620823ee9 in syscall () from
>> /lib/libc.so.6
>
> * 3 LWP 25495 "qemu-system-x86" 0x00007fc620af8e80 in ?? () from
>> /lib/libpthread.so.0
>
> 4 LWP 25496 "qemu-system-x86" 0x00007fc62081f697 in ioctl () from
>> /lib/libc.so.6
>
> 5 LWP 25497 "qemu-system-x86" 0x00007fc62081f697 in ioctl () from
>> /lib/libc.so.6
>
> 6 LWP 25498 "qemu-system-x86" 0x00007fc62081db9d in poll () from
>> /lib/libc.so.6
>
> 7 LWP 25500 "threaded-ml" 0x00007fc62081db9d in poll () from
>> /lib/libc.so.6
>
> 8 LWP 25501 "qemu-system-x86" 0x00007fc620af5e1d in pthread_cond_wait
>> () from /lib/libpthread.so.0
>
> 9 LWP 25502 "qemu-system-x86" 0x00007fc620af5e1d in pthread_cond_wait
>> () from /lib/libpthread.so.0
>
> (gdb) bt
>
> #0 0x00007fc620af8e80 in () at /lib/libpthread.so.0
>
> #1 0x00007fc620af8f5f in () at /lib/libpthread.so.0
>
> #2 0x00007fc620af906f in sem_timedwait () at /lib/libpthread.so.0
>
> #3 0x000055b66332e585 in qemu_sem_timedwait (sem=0x55b664e6c868,
>> ms=10000) at util/qemu-thread-posix.c:289
>
> #4 0x000055b6633279b6 in worker_thread (opaque=0x55b664e6c7f0) at
>> util/thread-pool.c:102
>
> #5 0x00007fc620aef767 in () at /lib/libpthread.so.0
>
> #6 0x00007fc62082985f in clone () at /lib/libc.so.6
>
>
next reply other threads:[~2017-10-19 9:32 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-19 9:32 Wahaha Huang [this message]
2017-10-19 13:29 ` [Qemu-devel] [Block-io] qemu virtual machine get stuck during startup Stefan Hajnoczi
2017-10-20 1:51 ` Wahaha Huang
2017-10-20 9:51 ` Stefan Hajnoczi
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