we dont want to maintain all the inodes in the memory i.e inodes can be on the disks (dinodes) as well therefore dentry acts as a cache for the faster access of the inodes. You dont have to everytime do a disk access to have an inode There is a VFS sitting in between the lower FS & upper filesystem. Now the idea of not having the inodes directly in file table is to keep the lower filesystem independent of each other i.e they can have their own definition of the inodes. There has to be a place who has to maintain the abstraction of inodes and the filetable and VFS does it. Thanks, Sumit Saji Kumar VR wrote: > > Hi, > > Can some one please tell why do we need dentry? cant we just have inode > pointer directly from file structure? what is the advantage? how its used to > increase performance? > > Rgds, > Saji > > ------------------------------------------------------------ > Name: Wipro_Disclaimer.txt > Wipro_Disclaimer.txt Type: Plain Text (text/plain) > Encoding: 7bit
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