Reflinks

Posted Apr 10, 2025 17:12 UTC (Thu) by willy (subscriber, #9762)
Parent article: Two approaches to better kernel samepage merging

> There have been efforts over the years to create a generalized reflink capability for Linux without success, but some filesystems implement that functionality internally.

Minor correction: reflink is always implemented by individual filesystems. What I was talking about was sharing the page cache between reflinked files. It's been discussed many times over the years, with no generic solution yet. erofs implements it internally.