ok but as i know that each file have a single inode. So if the duplication
takes place is t or the same inode is hat new inodes are create or
the inode entry is copied to all processes
On 1/17/07, Peter Staubach <staubach@xxxxxxxxxx> wrote:
gaurav wrote:
> thats rite but wen all processes have different address spaces so cant
we
> say that each process have duplicated copy of same data?
>
Of course all of the processes have a copy of the same data. The data
is copied, from the page cache, into a buffer which is contained in the
address space of the process. This buffer is allocated by the process,
not by the operating system.
The operating system maintains a single copy of the data in its page
cache, no matter how many processes are accessing the data and if it
has enough free memory to do so.
ps
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Gaurav....
