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由 Paolo Valente 提交于
bfq simple heuristic from cfq for detecting whether the drive performs command queueing: check whether the average number of in-flight requests is above a given threshold. Unfortunately this heuristic does fail to detect queueing (on drives with queueing) if processes doing I/O are few and issue I/O with a low depth. To reduce false negatives, this commit lowers the threshold. Signed-off-by: NPaolo Valente <paolo.valente@linaro.org> Signed-off-by: NJens Axboe <axboe@kernel.dk>
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