Re: [Qemu-devel] virtio-serial-pci very expensive during live migration

[Chris Friesen]

On 05/08/2014 07:47 AM, Amit Shah wrote:

> Chris, I just tried a simple test this way:
>
> ./x86_64-softmmu/qemu-system-x86_64 -device virtio-serial-pci -device 
> virtserialport -S -monitor stdio -nographic
>
> and it didn't crash for me.  This was with qemu.git.  Perhaps you can
> try in a similar way.

I just tried it with the "stable-1.4" branch from upstream with my first 
patch added on.

Incidentally, to compile on Fedora 19 I had to delete 
"include/libfdt_env.h" in the qemu package since it was overriding the 
version from libfdt in the host, causing errors like:

/usr/include/fdt.h:58:2: error: unknown type name ‘fdt32_t’
  fdt32_t magic;    /* magic word FDT_MAGIC */




Anyway, it seems to boot up okay, which is better than what I was 
getting before.  I ran it as:


qemu-system-x86_64 -machine accel=kvm -m 1000 guest.img -device 
virtio-serial -chardev socket,path=/tmp/foo,server,nowait,id=foo -device 
virtserialport,chardev=foo,name=myfoo


My earlier version was using a yocto-modified version of qemu, further 
modified locally.  There's probably a bug in there somewhere.


Chris