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Your test exercises weird code paths (see below). I'd recommend that you copy the entire home directory, not just the ~/Library folder, to your file system.

I'll try that.

If ATS is wedged, not much on the system is going to work. What does a "sample" log of ATS look like? Do you mean fs_usage? or some log that ATS keeps? if the latter,where is it?

Have you tested your mmap code path? This is something that VFS developers often get wrong, and the system uses mmap a lot. I have not tested mmap in much depth, but running executables out of afs appears to work fine, which I assumed would exercise ubc some. I'll see if I can dig up or write some test code for shared writable mappings.

The best way to get to the bottom of problems like this is to open a DTS incident. I'll ask around and see if cmu has any unexpired ones. Is this problem description "single" and "discrete" enough for DTS?

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