Hi Keir,
Unmodified drivers can not build out, seems inconsistent version. 
$ ./mkbuildtree
Defaulting to this machine's architecture, i686, for linking.
This may be overridden on the command line (i386,x86_64,ia64).
find:
/home/nightly/builds_xen_3.1.1_pae/xen-3.0-hg-xen_3.1.1_pae-15432-200709
20/unmodified_drivers/linux-2.6/../../linux-2.6.18-xen.hg/drivers/xen/:
No such file or directory
/home/nightly/builds_xen_3.1.1_pae/xen-3.0-hg-xen_3.1.1_pae-15432-200709
20/unmodified_drivers/linux-2.6/../../linux-2.6.18-xen.hg/include/xen:
No such file or directory
Best Regards,
Yongkang You
 
>-----Original Message-----
>From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx 
>[mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Keir Fraser
>Sent: Thursday, September 20, 2007 5:37 PM
>To: xen-devel
>Subject: [Xen-devel] ANNOUNCE: Xen 3.1.1 First Release Candidate
>
>Folks,
>
>The patch queue for 3.1.1 has been pushed into
>http://xenbits.xensource.com/xen-3.1-testing.hg, and tagged as 
>-rc1. Please
>try it out and let us know of any problems (patches gladly accepted!).
>
> -- Keir
>
>PS. The patch queue (xen-3.1-testing.pq.hg) is no longer being used.
>
>
>_______________________________________________
>Xen-devel mailing list
>Xen-devel@xxxxxxxxxxxxxxxxxxx
>http://lists.xensource.com/xen-devel 
>
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