Hi -
I have built a number of Windows based appliances under Xen 3.2.1. Each was 
created on an AMD based machine and includes a clean install of a Windows OS 
and cygwin. Each worked fine.
I then rsync'd the images to three different Xeon based machines, each running 
an identical version of Xen. On these machines, under the 64-bit OS's, the 
cygwin bash builtin test ("[") crashes. It works fine on the 32-bit OS's.
To verify, I did clean installs of the 64-bit OS's, and cygwin, as guests on 
one of the Xeon boxes. The cygwin post install scripts fail because of the 
bash builtin test failure.
This issue has been reported one other time on the cygwin lists, also by a user 
running a 64-bit Windows OS under Xen. There is no report of this problem by 
users running 64-bit Windows directly on the hardware.
Tested OS's:
Windows Server 2003 Standard 32-bit Edition
Windows Server 2003 Standard R2 x64 Edition
Windows Server 2008 Standard 32-bit Edition
Windows Server 2008 Standard 64-bit Edition
CPU's:
#1 Dual-Core AMD Opteron(tm) Processor 2216 HE
#2 Intel(R) Xeon(R) CPU E5320 @ 1.86GHz
#3 Intel(R) Xeon(R) CPU X5355 @ 2.66GHz
#4 Intel(R) Xeon(R) CPU 5130 @ 2.00GHz
The problem is dependent on the 64-bit OS / hardware combination. I suspect 
the problem derives from the way Xen virtualizes the 64-bit Xeons for HVM 
guests. Exactly how I cannot say (and this could wrong).
Any comment would be welcome.
Thank you,
Stephen
 

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