Virtualization - Mar 2010 - Problem with multiple hvc consoles via virtio-console

Hello,

When multiple hvc console ports are initialised and used via the
virtio_console driver, I can interact with only the first console, the
2nd one doesn't respond.

If I call hvc_kick() even if hvc_poll() returns 0, the 2nd console
becomes responsive.

I've checked that hvc_poll() receives data via get_chars() and feeds it
to tty_insert_flip_char().

Any idea what could be going wrong? This is reproducible on Linus' git
kernel as the guest kernel with the qemu.git repo.

Any pointers?

Thanks,
		Amit

On (Wed) Mar 24 2010 [21:04:08], Amit Shah wrote:
> Hello,
> 
> When multiple hvc console ports are initialised and used via the
> virtio_console driver, I can interact with only the first console, the
> 2nd one doesn't respond.
> 
> If I call hvc_kick() even if hvc_poll() returns 0, the 2nd console
> becomes responsive.
Actually it's not that fancy: if I login to the first console (hvc0) and
then spawn another one (hvc1), I can't login into hvc1. If I spawn hvc1
before logging into hvc0, I can work with both.

		Amit