Re: [Qemu-devel] [PATCH v3 0/4] char: write callback, virtio-console: flow control

[Amit Shah]

On (Thu) Apr 15 2010 [13:04:40], Paul Brook wrote:
> > This series lets interested callers ask for an -EAGAIN return from the
> > chardev backends (only unix and tcp sockets as of now) to implement
> > their own flow control.
> 
> As mentioned previously, I think this is a bad idea.  The device has no 
> useful 
> way of determining when to transmit the rest of the data.

The device gets a callback which indicates the chardev is ready to
accept more data.

                Amit