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由 Yi Wu 提交于
Summary: When write stalls because of auto compaction is disabled, or stop write trigger is reached, user may change these two options to unblock writes. Unfortunately we had issue where the write thread will block the attempt to persist the options, thus creating a deadlock. This diff fix the issue and add two test cases to detect such deadlock. Test Plan: Run unit tests. Also, revert db_impl.cc to master (but don't revert `DBImpl::BackgroundCompaction:Finish` sync point) and run db_options_test. Both tests should hit deadlock. Reviewers: sdong Reviewed By: sdong Subscribers: andrewkr, dhruba, leveldb Differential Revision: https://reviews.facebook.net/D60627
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