LKML: Jeff Layton: [RFC PATCH v1 00/30] fs: inode->i_version rework and optimization

[RFC PATCH v1 00/30] fs: inode->i_version rework and optimization tl;dr: I think we can greatly reduce the cost of the inode->i_version counter, by exploiting the fact that we don't need to increment it if no one is looking at it. We can also clean up the code to prepare to eventually expose this value via statx(). The inode->i_version field is supposed to be a value that changes whenever there is

[meech]

NFSなどでfileの変更を検出するi_versionは, writeのたびにincrementされ、diskに書かれる。でも、誰も見ていなければそれってskipしてよくない?ってことで、BUMP必要な時だけincするというpatch. 50%向上かな?