Re: page cache doubt

["manish regmi" <manish_regmi@xxxxxxxxxxx>]

>     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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