Odd.  On the SVN trunk, I'm running this code:

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open (LSTOPO, "lstopo -.xml|") || die "Can't open lstopo";                        
my $lstopo;                                                                       
while (<LSTOPO>) {                                                                
    $lstopo .= $_;                                                                
    print "Read: $_";                                                             
}                                                                                 
close(LSTOPO);                                                                    

my $xml;                                                                          
$xml = XMLin($lstopo);                                                            
print Dumper($xml);
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In looking at the output, I see that lstopo's XML output includes all PCI devices, but when I look at the Dumper output of the parsed XML, some PCI devices are not listed.  In particular: both eth4 and eth5 are included in the "lstopo -.xml" output, but eth4 is not included in the Dumper output.

The same thing happens if I "lstopo foo.xml" and then "XMLin("foo.xml")".  So it's not a problem with perl reading from lstopo's stdout.

I've attached foo.xml -- any ideas why this is happening?