Hi Jens, I'm wondering about the impact on memory mapped files. Let's say one (or more) process(es) called mmap on a file in order to use the content of the file as persistent shared memory. As far as I understand pages from the page cache are used for this. Now another process uses RWF_UNCACHED for a read of the same file. What happens if the pages are removed from the page cache? Or is the removal deferred based on some refcount? Thanks! metze