d06a5364e1
- If we fail to do a non-blocking acquire of a buf lock while doing a waiting sync pass we need to do a blocking acquire and restart. Another thread, typically the buf daemon, may have this buf locked and if we don't wait we can fail to sync the file. This lead to a great variety of softdep panics because we rely on all dependencies being flushed before proceeding in several cases. Submitted by: jeffr