Hi linux file system experts, I'm so sorry that I've asked again the general question about Linux file systems. For example, if there is a file a.txt in the path /foo/ bar, what should I do to completely evict(remove) the inode of bar directory from memory and read the inode via disk access? A few weeks ago. I asked a question about dentry and Ted told me that there is a negative dentry on Linux. I tried to completely evict(remove) the dentry cache using FS API in include/fs.h and dcache.h, and also evict the inode from memory, but I failed. The FS API I used is: dput() // to drop usage count and remove from dentry cache iput() // to drop usage count and remove from inode cache. To be honest, I'm confused about which API to cope with my question. As far as I know, even though metadata is released from the file system cache, it is managed as an LRU list. I also saw some code related to CPU cacheline. When I look at the superblock structure, there are also inodes, dcache lists, and LRUs. How can I completely evict the inode from memory and make disk access as mentioned above? Thank you in advance
