[Linux-cachefs] FS-Cache for NFS-root ?

[David Howells]

Wilhelm Meier <wilhelm.meier at fh-kl.de> wrote:

> I made a rudimentary initramfs (see attached), but I'm not sure if I did it 
> the right way. The problem is, that the rootfs remains mounted (to the 
> unreachable mount-pount /fscache) after switch_root. 

Hmmm...  I think this might have to wait until I get back from my holiday in
Australia (Feb).  At that point I'll have my test machine to hand again and
can try it for myself.  Sorry about that.

> How can one get some statistics from cachefilesd? It looks like the cache 
> isn't filled very much: I copied /usr (of the cached root-filesystem) 
> to /dev/null and the cache gets about 13M of data whereas /usr is more than 
> 1G of data.

du, find, /proc/sys/fs/nfs/fscache_*

I should probably add some stats gathering stuff to FS-Cache when I've
finished fixing it up .

David