RE: [Xen-ia64-devel][PATCH] optimization for windows

["Xu, Anthony" <anthony.xu@xxxxxxxxx>]

>From: Alex Williamson [mailto:alex.williamson@xxxxxx]
>Sent: 2007å4æ27æ 21:08
>To: Xu, Anthony
>Cc: JÃrgen GroÃ; xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
>Subject: RE: [Xen-ia64-devel][PATCH] optimization for windows
>
>On Fri, 2007-04-27 at 17:36 +0800, Xu, Anthony wrote:
>> >Wouldn't it be better to have some generic features like "region x identity
>> >mapping with attributes y" which can be set via DomU configuration file?
>> It is not convenient for user.
>> And user can't know this information, if we provide this interface to user.
>> User may be confused, and if user uses this configuration incorrectly, it 
>> will
>> break guest.
>
>   I think we need to be careful not to hide too many assumptions about
>the guest in Xen as well.  We can't be certain another OS won't use
>region 7 like this at some point.  I agree that a requiring a user to
>know certain memory layout attributes is way too low level, but what
>about a simple flag like "guest = windows".  Yes, it's not automatic
>like the code is now, but it feels more supportable.  Thanks,

I had been thinking of this issue.
What I concern is, this optimization is specific to windows.
So if user sets "guest = windows", and runs linux as guest, 
This may make guest linux behave strangely, or crash.
Yes, you can say this is user's fault, but user may complain.


What's your position?

Thanks,
Anthony


>
>       Alex
>--
>Alex Williamson                             HP Open Source & Linux Org.

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