Hi everybody, I'm really curious about whether there is any literature that describe Linux's file systems(e.g. ext2{3,4}, btrfs) deeply? I can't find much literature about Linux's filesystem. I have read some papers about Unix's file system. For example, **A Fast File System for UNIX**, which explain things in detail(though not so informative for me). I also read **Design and Implementation of the Second Extend Filesystem** by Remy, Theodore, et al. But those papers and blogs can't make thing clear for me, because there are so many things that they have not explained. I wonder is there any book that explain one of the Linux filesystem(design, implementation) in detail, like what Mal Gorman explain about Linux Memory Management in his books **Understand The Linux Memory Manager** and **Code Commentary On The Linux Virtual Memory Manager** ? Thanks in advance, Ruan.