[Qemu-devel] Re: USB problem in QEMU

[Raúl Sánchez Siles]

Yu, Xiaoyang wrote:

> 
> 
> The USB problem I met is that using some kind of USB disks will cause
> guest OS run extremely slow, while these disks can work properly in host
> OS. It looks like the USB simulation in QEMU is not fully featured, and
> can not handle some error conditions properly.
> 
  I've also noticed this, I thought it was a multiconfiguration problem, but
even applying the patch suggested sometime ago here, I could noticed the
slowness.

  For this I guess the configuration is linux host and windows guest as is
my case.  Slowness started once I issued usb_add on the qemu console and
after finding the emulated system unusable slowness stopped on usb_del on
qemu console again.

  I think the problem may be the qemu lacks some usb feature, maybe not
implemented yet. But I would be glad of hear what qemu people has to say
about this.

  Thanks.

-- 
Raúl Sánchez Siles