> Can anyone suggest other mount options I should tweak?
I have tried cache=fscache and cache=loose. In both cases I see startling
cases of incoherency: ie reading file X returns contents of file Y (neither
of which has been modified for months).
Maybe my linux kernel is too old? (4.9.0-5-amd64)
Quite possibly, though it occurs to me: if you just want to make forward progress in the short term, perhaps consider using the local Linux filesystem and exporting that to plan9 using a user-space 9p server?
- Dan C.