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by tavianator
816 days ago
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Locks are perfectly usable in filesystem code, but test_and_set_bit()/wait_on_bit() has lower overhead, so they'll get used as an optimization. This function is called on every metadata read, so the improved performance/scalability of raw atomics over locks can probably make a difference on fast storage. Also the code used to use locks, and it wasn't any simpler: https://lore.kernel.org/linux-btrfs/20230503152441.1141019-2... |
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