Does someone have a clue about this? I just cannot understand the i_mapping x i_data relationship. Any comment is very welcome!
Luciano
Luciano A. Stertz wrote:
I'm trying to understand the page cache mechanism, but I have a doubt and couldn't find any documentation about it, neighter was able to understand reading the code. Hope that someone can help me and/or indicate some doc.
Every inode has an address_space, that keeps a list of cached pages in a digital tree. So far so good. Now the doubt: the inode struct has two address_spaces, i_mapping and i_data. As far as I could understand, i_mapping is the address_space I'm looking for, since it is passed to the readpage method, but what is i_data function?
TIA, Luciano Stertz
Dont know in detail, But this page might help you.
http://www.csn.ul.ie/~mel/projects/vm/guide/html/understand/node1.html
Also, One is a i_data is a structure and i_mapping is a pointer to the structure.
regards manish
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