[Qemu-devel] Re: LSI SCSI: raise UDC on infinite loop

[Anthony Liguori <aliguori@us.ibm.com>]

Marcelo Tosatti wrote:
> (resending with Signed-off-by)
>
> -----
>
> Raise UDC (Unexpected Disconnect) when a large enough number of
> instructions has been executed by the SCRIPTS processor. This "solution"
> is much simpler than temporarily interrupting execution.
>
> This remedies the situation with Windows which downloads SCRIPTS code
> that busy loops on guest main memory. Their drivers _do_ handle UDC 
> appropriately (at least XP and 2003).
>
> It would be nicer to actually detect infinite loops, but until then,
> this bandaid seems acceptable.
>
> Since the situation seems to be rare enough, raise the number 
> of instructions to 10000 (previously 1000).
>
> Three people other than myself had success with this patch.
>
> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
>
>   

Applied.  Thanks.

Regards,

Anthony Liguori