Chris Chilvers [off-list ref] wrote:

While testing the fscache performance fixes [1] that were merged into 6.4-rc1
it appears that the caching no longer works. The client will write to the cache
but never reads.

Can you try reading from afs?  You would need to enable CONFIG_AFS_FS in your
kernel if it's not already set.

Install kafs-client and do:

	systemctl enable afs.mount
	md5sum /afs/openafs.org/software/openafs/1.9.1/openafs-1.9.1-doc.tar.bz2
	cat /proc/fs/fscache/stats
	umount /afs/openafs.org
	md5sum /afs/openafs.org/software/openafs/1.9.1/openafs-1.9.1-doc.tar.bz2
	cat /proc/fs/fscache/stats

David