Hi all, I would like to know where (in Xen or Linux source code) a domU page fault is treated in a Xen (version Xen 4.2). Is it treated by: 1) the domU operating system do_page_fault() routine, in linux-source-xxx/arch/x86/mm/fault.c. In this case, how does the modification of domU page tables are possible since a domU is not allowed to update them. or 2) the hypervisor do_page_fault() routine, in xen/arch/x86/traps.c. In this case, how does the domU maintains its internal page fault stats. Regards. Alain