Sorry, it was a TSI, not a bug report. I replied to the DTS email yesterday with the full spin dump. Ahh, I see it now. So, the first thing I actually did was search for /usr/lib/libEndpointSecurity.dylib (the library link path), which is a convenient way to find all ES clients. What you'll find is that there are two clients— yours and a (presumably unrelated) 3rd party client. That's a critical factor here because it means that there are now two independent entities with veto power over each other's activities, particularly activity that's coming from helper components (not just the direct ES client). That leads to here: There are only 2 other threads in the logs that appear relevant, both from our helper process and both down in APFS. One of them is also stuck inside decmpfs_read_compressed: That's the deadlock. More specifically, looking at your thread's stack when you enter decmpfs_read_compressed, the first thing it does is call decmpfs_lock_compressed_data: (1) *940 decmpfs_read_compressed + 300 (kernel
Topic:
App & System Services
SubTopic:
Core OS
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