[fuse-devel] a question regarding the page cache

[Hans B. <han...@gm...>]

Hi all. I am using a sort of pass-through r/o file system written using 
the high level API. That is, files on the real file system are massaged 
before being exposed to the user in a FUSE mount point. Now, something 
that confuses me is how the page cache works for files accessed through 
a FUSE file system.
Is it the file/inode that is exposed through FUSE that will populate the 
cache or is it the actual file accessed on the real file system?
I would like to flush the page cache in a controlled manner through e.g. 
fsync(), but can I actually do that from the fs implementation? Or would 
that have to be done from the process actually opening the file in the 
FUSE mount point, meaning it is out of my control?

Thanks.
Hans