[Xen-devel] question about running vm change its mem maxsize

[tgh <tianguanhua@xxxxxxxxxx>]

hi
I  read the code of xc_linux_build() and xc_domain_setmaxmem(),and I am 
confused about how does "xm mem-max" change the  max  size  of mem  for  
a  running  VM
In xc_domain_setmaxmem() ,the XEN_DOMCTL_max_mem has been called ,and  
just  does  "d->max_pages = new_max;"
while in the xc_linux_build(),  before the vm boots up,the maxsize pfn 
is alloced in an array with fixsize, page_array = malloc(nr_pages * 
sizeof(unsigned long))
then how does  a running vm  changes its mem maxsize ,especially for 
expanding its mem maxsize?
I am confused about it

could you help me
Thanks in advance


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