The most common way for a mapping to be stale is when a file was deleted, or renamed. Nothing updates the mappings for deletions yet. But they can also become stale in other ways. For example a file can be modified. So, the mapping is not trusted to be consistent. When we get a key, only replace symlinks that still point to that key with its content. When we drop a key, only put back symlinks for files that still have the direct mode content. |
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