[Qemu-devel] Re: Fwd: Guest hangs when I do general operation.

[Marcelo Tosatti <mtosatti@redhat.com>]

On Tue, Sep 07, 2010 at 10:43:38AM +0800, Amos Kong wrote:
> ---------- Forwarded message ----------
> From: Amos Kong <kongjianjun@gmail.com>
> Date: Tue, Sep 7, 2010 at 7:49 AM
> Subject: Guest hangs when I do general operation.
> To: 王箫 <sirouni@gmail.com>
> 
> 
> kvm upstream: 43e413f7db1a4a90671dda0b1d6c1f8cb30673ed KVM: Whitespace
> changes to remove differences wrt kvm-updates/2.6.37
> qemu upstream: cb93bbdd7db92e50ff5e60a346b23df68acae46b Fix OpenBSD
> linker warning
> 
> # ./x86_64-softmmu/qemu-system-x86_64 ~/win7-32.qcow2 -m 1024 -vnc :0
> -usbdevice tablet -cpu qemu64 -snapshot -enable-kvm -bios pc-bios/bios.bin
> 
> Guest hangs when I do general operation.
> It's fine when using upstream qemu-kvm.  this problem only occurred
> one time when I debug by gdb, after execute 'continue', guest runs
> normally.
> 
> debug msg of (qemu + kvm)
> (gdb) c
> Continuing.
> 
> Program received signal SIGUSR2, User defined signal 2.
> 0x00007fc7d4d7bfb3 in select () at ../sysdeps/unix/syscall-template.S:82
> 82      ../sysdeps/unix/syscall-template.S: No such file or directory.
>        in ../sysdeps/unix/syscall-template.S
> (gdb) bt

Try "handle SIGUSR2 nostop" in gdb before executing qemu-kvm.