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b5cd957f42
This extends lfs_fs_gc to now handle three things: 1. Calls mkconsistent if not already consistent 2. Compacts metadata > compact_thresh 3. Populates the block allocator Which should be all of the janitorial work that can be done without additional on-disk data structures. Normally, metadata compaction occurs when an mdir is full, and results in mdirs that are at most block_size/2. Now, if you call lfs_fs_gc, littlefs will eagerly compact any mdirs that exceed the compact_thresh configuration option. Because the resulting mdirs are at most block_size/2, it only makes sense for compact_thresh to be >= block_size/2 and <= block_size. Additionally, there are some special values: - compact_thresh=0 => defaults to ~88% block_size, may change - compact_thresh=-1 => disables metadata compaction during lfs_fs_gc Note that compact_thresh only affects lfs_fs_gc. Normal compactions still only occur when full.