RE: [Qemu-devel] Re: USB problem in QEMU

[Yu, Xiaoyang]

I found that using "usb_add disk:/dev/sda" instead of "usb_add host:1.1" will 
fix this problem. 

Thanks
Xiaoyang
 

-----Original Message-----
From: address@hidden [mailto:address@hidden On Behalf Of Raúl Sánchez Siles
Sent: 2007年4月23日 17:20
To: address@hidden
Subject: [Qemu-devel] Re: USB problem in QEMU

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