[LSF/MM/BPF TOPIC] File system testing

["Theodore Tso" <tytso@mit.edu>]

I'd like to propose a perennial favorite file system testing as a
topic for the FS track.  Topics to cover would include:

1) Standardizing test scenarios for various file systems.

   I have test scenarios for ext4 and xfs in my test appliance (e.g.,
   4k, 64k, and 1k blocksizes, with fscrypt enabled, with dax enabled,
   etc.)  But I don't have those for other file systems, such as
   btrfs, etc.  It would be nice if this could be centrally documented
   some where, perhaps in the kernel sources?

2) Standardized way of expressing that certain tests are expected to
   fail for a given test scenario.  Ideally, we can encode this in
   xfstests upstream (an example of this is requiring metadata
   journalling for generic/388).  But in some cases the failure is
   very specific to a particular set of file system configurations,
   and it may vary depending on kernel version (e.g., a problem that
   was fixed in 6.6 and later LTS kernels, but it was too hard to
   backport to earlier LTS kernels).

3) Automating the use of tests to validate file system backports to
   LTS kernels, so that commits which might cause file system
   regressions can be automatically dropped from a LTS rc kernel.

   	       	      		    	    	 - Ted