Re: [Qemu-devel] [PULL 6/6] Monitor: Make output buffer dynamic

[Luiz Capitulino <lcapitulino@redhat.com>]

On Mon, 01 Apr 2013 10:35:34 -0500
Anthony Liguori <aliguori@us.ibm.com> wrote:

> Luiz Capitulino <lcapitulino@redhat.com> writes:
> 
> > Commit f628926bb423fa8a7e0b114511400ea9df38b76a changed monitor_flush()
> > to retry on qemu_chr_fe_write() errors. However, the Monitor's output
> > buffer can keep growing while the retry is not issued and this can
> > cause the buffer to overflow.
> >
> > To reproduce this issue, just start qemu and type on the Monitor:
> >
> > (qemu) ?
> >
> > This will cause the assertion to trig.
> >
> > To fix this problem this commit makes the Monitor buffer dynamic,
> > which means that it can grow as much as needed.
> >
> > Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
> 
> This breaks hotplug according to git bisect.  The test output is:

I'm trying to reproduce this w/o qemu-test as you suggested on irc, but
what I'm getting is:

# ./qemu-qmp -enable-kvm -qmp unix:./qmp-sock,server,nowait -monitor stdio
QEMU 1.4.50 monitor - type 'help' for more information
(qemu) device_add virtio-blk-pci,drive=hd0
Property 'virtio-blk-pci.drive' can't find value 'hd0'
**
ERROR:/home/lcapitulino/work/src/upstream/qmp-unstable/qom/object.c:1003:object_get_canonical_path: assertion failed: (obj->parent != NULL)

Also happens on master, so I'll bisect that one first...