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[Xen-devel] VT-VMX: monitor_table not zeroed when entering alloc_monitor_pagetable

  • To: Xen Mailing List <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: Daniel Stekloff <dsteklof@xxxxxxxxxx>
  • Date: Thu, 27 Oct 2005 16:20:34 -0700
  • Delivery-date: Thu, 27 Oct 2005 23:17:45 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>

I'm hitting an ASSERT in alloc_monitor_pagetable() with debug=y and I
can reproduce the condition when debug isn't on. The monitor_table is
not zeroed when entering alloc_monitor_pagetable() - this happens when I
create a vmx guest. I'm not sure why this happening at first glance.

File: xen/arch/x86/shadow32.c 
Line: 689
System: VT/VMX FC3 x86_32 (I can reproduce on FC4 x86_64 too)

ASSERT(pagetable_get_paddr(v->arch.monitor_table) == 0);

The monitor_table should be zeroed before coming into this function by
free_monitor_pagetable(), unless monitor_vtable is already zeroed.

File: xen/arch/x86/shadow32.c
Line: 935

        if ( v->arch.monitor_vtable )
        if ( mode & SHM_external )

Is anyone else seeing this problem? 



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