Hello,
For debugging purposes, I would like to get information about read
requests for FUSE filesystems that are answered from the page cache
(i.e., that never make it to the FUSE userspace daemon).
What would be the easiest way to accomplish that?
For now I'd be happy with seeing regular reads and knowing when an
application uses mmap (so that I know that I might be missing reads).
Not having done any real kernel-level work, I would start by looking
into using some tracing framework to hook into the relevant kernel
function. However, I thought I'd ask here first to make sure that I'm
not heading into the completely wrong direction.
Best,
-Nikolaus
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