----- Original Message -----
 Dave,
 
 could you please set debug level (set debug 3) and run again
 backtrace for core-files:
 1. which generate segmentation violations
 2. which contain repetitive `apic_timer_interrupt` frames
 and send output to me.
  
OK -- I've copied the test output for just those dumpfiles here:
  
http://people.redhat.com/anderson/Alexandr/sigsegv.out
The test was invoked as:
 # crash -s vmlinux vmcore
and these commands were run:
 bt
 set debug 3
 bt -H
 q
Dave