[Xen-bugs] [Bug 490] New: 32-bit calls lock x86-64 system hard

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http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=490

           Summary: 32-bit calls lock x86-64 system hard
           Product: Xen
           Version: unstable
          Platform: x86-64
        OS/Version: Linux
            Status: NEW
          Severity: blocker
          Priority: P1
         Component: Guest-OS
        AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
        ReportedBy: grantma@xxxxxxxxxxxxxxx


Found this one when executing linux-2.6-xen.hg kernel under 3.0 testing
hypervisor.  Whenever I tried to execute chrooted 32-bit progams, the system
would lock solid.  Doing a 'Chroot /' worked so I don't suspect the chroot call.
 I also ahd AGP enabled.

Hardware is a shuttle  x86-64 machine with a AMD 64 3200+ processor


(under 2.6.15.1 linux vanilla kernel.org)
grantma@sharon:~$ cat /proc/cpuinfo
processor       : 0
vendor_id       : AuthenticAMD
cpu family      : 15
model           : 31
model name      : AMD Athlon(tm) 64 Processor 3200+
stepping        : 0
cpu MHz         : 1004.906
cache size      : 512 KB
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
pat pse36 clflush mmx fxsr sse sse2 syscall nx mmxext fxsr_opt lm 3dnowext 3dnow
lahf_lm
bogomips        : 2011.09
TLB size        : 1024 4K pages
clflush size    : 64
cache_alignment : 64
address sizes   : 40 bits physical, 48 bits virtual
power management: ts fid vid ttp

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