Replace list based free/busy/requeue list with FIFO + ring
authorJens Axboe <axboe@kernel.dk>
Tue, 28 May 2013 12:16:55 +0000 (14:16 +0200)
committerJens Axboe <axboe@kernel.dk>
Tue, 28 May 2013 12:16:55 +0000 (14:16 +0200)
Cache friendliness of the list is pretty low. This has
provably lower overhead.

Signed-off-by: Jens Axboe <axboe@kernel.dk>

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