[Qemu-devel] Re: USB problem in QEMU

["Raúl Sánchez Siles" <rss@barracuda.es>]

Raúl Sánchez Siles wrote:

> 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.
> 

  I'm still interested in this, I would appreciate some comment about the
issue.

  Thanks.

-- 
Raúl Sánchez Siles