Re: QEMU hangs with smp option on ubuntu 16.04 ... any fix?

After I added "-cpu 34Kf", qemu would start normally again even with "-smp
2" option.

However, "cat /proc/cpuinfo" only shows 1 CPU.  "uname -a" shows the
following which seems to suggest the kernel is not SMP aware.  Is there a
kernel for malta with SMP support?

Linux debian-mips 4.9.0-7-4kc-malta #1 Debian 4.9.110-3+deb9u2 (2018-08-13)
mips GNU/Linux

Thanks.

Jun

On Sat, Oct 6, 2018 at 8:47 AM Jun Sun <[email protected]> wrote:

> Hi, all,
>
> I've been loosely following the instruct at this page,
> https://github.com/kholia/mips-hacking
>
> My host is ubuntu 16.04.  I used ubuntu prebuilt qemu system images.
>
> My guest is the latest stretch 9.5 malta netboot images.  Kernel is
> vmlinux-4.9.0-7-4kc-malta.
>
> Below is my startup script.  If I change "smp" to 2, the startup will hang
> very early on.   Does anybody if this is a known limit with debian distro?
> Or it is an issue with the ubuntu prebuilt qemu?  Or there are some other
> gotcha's here?
>
> qemu-system-mips \
> -M malta \
> -m 256 \
> -hda hda.qcow2 \
> -kernel vmlinux-4.9.0-7-4kc-malta \
> -initrd initrd.img-4.9.0-7-4kc-malta \
>     -append "root=/dev/sda1 console=ttyS0 nokaslr" \
> -nographic \
> -redir tcp:2222::22 \
> -smp 1 \
> \
>
> Cheers.
>
> Jun
>
>
>
>