On Wed, Oct 02, 2019 at 05:30:21PM +0900, Daegyu Han wrote: > 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? There is no API to do this from userspace. The only way to do this is to unmount the entire file system. >From the kernel, it's *way* more complicated than this. Making a shared-disk file system requires a lot more changes to the kernel code. You might want to take a look at ocfs2. This was a file system that started using the ext3 file system code, and **extensive** kernel-level code changes were made to make it be a shared-disk file system. - Ted
