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[Xen-users] dom0_mem not working in debian wheezy

Hi all,

      Today I found that dom0_mem option does not work in my 64G 2 cpu server , but works in my 16G 1 CPU server.
I am using debian wheezy and xen 4.3.3.
      Firstly I set GRUB_CMDLINE_XEN="dom0_mem=6G,max:6G" in /etc/default/grub,  
 Then execute:  
 After rebooting,  execute:
      xm list 0 
  Only see no more than 3967M reserved for Domain-0 in my 64G 2CPU server, however, my 16G 1CPU server display correctly.
  If I use xm mem-set 0 5000, dom0 memory also can be raised.
  But why it does not work with dom0_mem option?
Best Regards,
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