Re: [Qemu-devel] Char flow control patches

[Amit Shah]

On (Mon) 11 Feb 2013 [12:37:34], Amit Shah wrote:
> On (Wed) 30 Jan 2013 [08:38:50], Anthony Liguori wrote:
> > Amit Shah <address@hidden> writes:
> > 
> > > Hi Anthony,
> > >
> > > I did some basic testing of the char flow control patches from your
> > > char-flow.2 branch.  With the following patch applied, things seem to
> > > be working fine.  I tested the isa-serial and virtio-serial devices.
> > >
> > > I haven't yet tested with virtio-serial flow control, but at least no
> > > regressions as of now.
> > 
> > Awesome!
> 
> Well -- just tested starting sockets in non-server mode, and that
> fails with:

Found another one, though it's an old one (so not really a regression):

QEMU doesn't catch -EPIPE for short-lived guest processes and
disconnected host chardevs. This is also described in
https://bugzilla.redhat.com/show_bug.cgi?id=621484. To reproduce this
issue:

    start qemu, boot guest
    connect netcat to the unix socket
    echo some chars to /dev/virtio-ports/$name
    watch them appear in netcat
    stop netcat, restart it
    echo some chars again
    watch them *not* appear 

BTW I've just put up this feature page on the wiki with status,
testing and known bugs sections, which describe the two current known
bugs.

http://wiki.qemu.org/Features/ChardevFlowControl

                Amit