Re: [Qemu-devel] [PATCH 1/7] usb: remove old usb-host code

[Gerd Hoffmann]

  Hi,

> OK, then here is the first issue I ran into while trying libusbx (git
> head, i.e. 1.0.17+: The new stack causes significant latency issues that
> makes it almost unusable for pass-through of USB audio devices (some
> headset in my case). Reverting usb-linux and disabling libusb over QEMU
> git head makes things work again. I'll have to stick with this for now
> as it is affecting my work environment.
> 
> Any spontaneous ideas how to analyse or even resolve this?

Try setting isobsize property to something smaller than 32 (which is the
default).

cheers,
  Gerd