RE: [Xen-ia64-devel] [PATCH 0/6] Add full evtchn mechanism forxen/ia64

["Tian, Kevin" <kevin.tian@xxxxxxxxx>]

>From: Isaku Yamahata [mailto:yamahata@xxxxxxxxxxxxx]
>Sent: 2006年5月22日 13:43
>On Mon, May 22, 2006 at 12:53:11PM +0800, Tian, Kevin wrote:
>
>> Why is serial
>> required to be disabled in dom0? What's policy to choose which serial
>> to be disabled, if there're multiple serial ports with different type?
>
>In fact I'm not sure about the policy.
>Since xenLinux/x86 defines CONFIG_XEN_DISABLE_SERIAL=y, I
>thought
>it was the xen's policy. However I'm not sure whether it's right.
>It seemed that you used serial port from dom0, I wanted to confirm it.
>
>It is bad that xen and dom0 accesse to the same UART.
>This is only what I'm sure about.

Yes, that's bad which may be the reason why xen/x86 disables serial 
directly. Ideally that should also apply to xen/ia64 since that option is 
common in drivers/xen. So I'm not sure why that option doesn't work 
for ia64. Alex should know more about this area, and it may simply 
come from a mis-configuration case...

Thanks,
Kevin

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