[$] Filesystems, testing, and stable trees

In a filesystem session at the 2022 Linux Storage,Filesystem, Memory-management and BPF Summit (LSFMM), Amir Goldsteinled a discussion about the stable kernel trees. Those trees, andespecially the long-term support (LTS) versions, are used as a basis for avariety of Linux-based products, but the kind of testing that is being doneon them for filesystems is lacking. Part of the problem is that the teststarget filesystem developers so they are not easily used by downstreamconsumers of the stable kernel trees.