[Xen-bugs] [Bug 412] New: 32bit IBM JVM fails on x86_64

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http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=412

           Summary: 32bit IBM JVM fails on x86_64
           Product: Xen
           Version: unstable
          Platform: x86-64
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Hypervisor
        AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
        ReportedBy: kmr@xxxxxxxxxx


Using a 32bit IBM JVM in a x86_64 dom0 echos the following error and then hangs:

setupLdt: modify_ldt: Invalid argument

This behaviour can be replicated by doing a simple "java -version" using the
affected JVM.  This error does not occur when running the same JVM on a
baremetal Linux kernel.

Attaching strace to the hung process yields the following messages being
generated in a loop:

rt_sigprocmask(SIG_UNBLOCK, [ILL TRAP BUS FPE SEGV], ~[KILL USR2 STOP RTMIN
RT_1], 8) = 0
 --- SIGSEGV (Segmentation fault) @ 0 (0) ---

In some cases the machine is now unresponsive (mostly on uniprocessor dom0) and
must be reset.

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