[Xen-devel] how to know which file a memory page belongs to?

[谢雄炜 <xiexw24@xxxxxxxxx>]

Hi, all,

I'm a student. I want to use Xen to do some test about the relationship between memory and file in virtual machine.

In domain 0 or Xen, how can I know which file (in domain X) a memory page belongs to? 

For example, in Linux.

if i get the struct page of a 4k page, I can know which file it belongs to if it's a file memory cache.

if(unlikely(PageSwapCache(page)))

... ///(a swap cache)

else if ((unsigned long)page->mapping & PAGE_MAPPING_ANON)

...///(an anonymous page)

else

...  page->mapping->host ( I can get the inode of the file which this page belongs to.)

Can I achieve this in Xen through revise the code?

Thanks.

Best,

Wait

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