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

[Blue Swirl]

On Tue, Sep 7, 2010 at 2:43 AM, Amos Kong <address@hidden> wrote:
> ---------- Forwarded message ----------
> From: Amos Kong <address@hidden>
> Date: Tue, Sep 7, 2010 at 7:49 AM
> Subject: Guest hangs when I do general operation.
> To: 王箫 <address@hidden>
>
>
> 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.

This is normal, we use SIGUSR2 for AIO. By default, GDB stops and
prints a message about the signal. The same thing can happen with
SIGALRM.

GDB command 'handle SIGUSR2 nostop noprint pass' lets the program
continue without stopping.