Re:Re:Re:Re: [Xen-devel] Questions about shadow page table.

["Wu Bingzheng" <wubingzheng@xxxxxxx>]

In another word, how can page-fault handler distinguish the shadow-page-fault and non-shadow-page-fault?

When reading it's code, I skip all the code enabled only   #if SHADOW_OPTIMIZATIONS, is that ok?
> Hi,
>
> I have another question about Shadow.
> If a process writes a read-only page in guest OS, how does the page-fault handler deal with it?
> In sh_page_fault() [xen/arch/x86/mm/shadow/multi.c], which part deals with this case? In the label `emulate` and `not_a_shadow_fault` ?  But the points where jumps to the label `emulate` seems not to be this case (write readonly pages in guest), but seems to emulate accesses to page tables.
>
> Thanks,
> Wu

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