When running on SSDs, the Linux 6.2 kernel cycle will turn on Btrfs’ Async Discard feature by default. Two years ago, Btrfs introduced asynchronous discard support for moving SSD TRIM/discard to transaction commit. Doing work asynchronously is more efficient and helps reduce read latency. Now the Btrfs developers plan to enable it by default. Asynchronous discard is automatically turned on whenever an SSD is used as a drive. Currently…

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