linux vm page sharing

[Sharath Kodi Udupa <sku@CS.Arizona.EDU>]

hi,

i am trying to implement a system where different processes can share
pages, this means that not only same executables, but different
executables , but when the pages required are same.
but i see in the linux page structure, it keeps a pointer to the
address_space mapping, but now since if the second process also needs to
share the page,this wont be the same mapping. so i am planning to add the
page table entry to the second process, but to leave the
struct address_space *mapping pointer to whatever it was earlier. I plan
to do this since, i dont really understand how this is used and also have
gone through the code to understand it. What significance does this hold?

any pointers is greatly appreciated

regards,

Sharath K Udupa
Graduate Student,
Dept. of Computer Science,
University of Arizona.
sku@cs.arizona.edu
http://www.cs.arizona.edu/~sku

"Sometimes I think the surest sign that intelligent life exists
elsewhere in the universe is that none of it has tried to contact us."
--Calvin, The Indispensable Calvin and Hobbes


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