[Qemu-devel] virtio console users wrong port (sometimes)

[Neil McGill <nmcgill@cisco.com>]

Has anyone ever seen an issue with qemu where the consoles wind up
mixed up ? i.e hvc0 appears on vserial3, hvc1 on vserial0 as a
random example .

I've managed to reproduce this on qemu 2.0 and 1.0 on ubuntu LTS 14/12
and it happens 1 in every 16 times or so. However, I build qemu from
source (tried 2.4 and 1.0.1) to try and debug the problem is gone 8)

So just wondering if this has been seen before ? I'm very keen to
debug this if I can as it's driving me nuts due to the infrequence 8)

I don't *think* it's a kernel issue as the issue does seem gone when
I build my own qemu (over 30 runs with no issue)

here's the config snippet:

       -device virtio-serial,id=vserial0 \
       -chardev socket,host=0.0.0.0,port=13540,telnet,server,nowait,id=vserial0 \
       -device virtconsole,chardev=vserial0 \

       -device virtio-serial,id=vserial1 \
       -chardev socket,host=0.0.0.0,port=12804,telnet,server,nowait,id=vserial1 \
       -device virtconsole,chardev=vserial1 \

       -device virtio-serial,id=vserial2 \
       -chardev socket,host=0.0.0.0,port=18664,telnet,server,nowait,id=vserial2 \
       -device virtconsole,chardev=vserial2 \

       -device virtio-serial,id=vserial3 \
       -chardev socket,host=0.0.0.0,port=12880,telnet,server,nowait,id=vserial3 \
       -device virtconsole,chardev=vserial3 \

tx

neil