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blk-wbt: make enable_state more accurate
Currently, if user disable wbt through sysfs, 'enable_state' will be 'WBT_STATE_ON_MANUAL', which will be confusing. Add a new state 'WBT_STATE_OFF_MANUAL' to cover that case. Signed-off-by: Yu Kuai <yukuai3@huawei.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20221019121518.3865235-4-yukuai1@huaweicloud.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
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@ -435,8 +435,13 @@ void wbt_set_min_lat(struct request_queue *q, u64 val)
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struct rq_qos *rqos = wbt_rq_qos(q);
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if (!rqos)
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return;
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RQWB(rqos)->min_lat_nsec = val;
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RQWB(rqos)->enable_state = WBT_STATE_ON_MANUAL;
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if (val)
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RQWB(rqos)->enable_state = WBT_STATE_ON_MANUAL;
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else
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RQWB(rqos)->enable_state = WBT_STATE_OFF_MANUAL;
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wbt_update_limits(RQWB(rqos));
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}
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@ -28,13 +28,15 @@ enum {
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};
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/*
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* Enable states. Either off, or on by default (done at init time),
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* or on through manual setup in sysfs.
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* If current state is WBT_STATE_ON/OFF_DEFAULT, it can be covered to any other
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* state, if current state is WBT_STATE_ON/OFF_MANUAL, it can only be covered
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* to WBT_STATE_OFF/ON_MANUAL.
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*/
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enum {
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WBT_STATE_ON_DEFAULT = 1,
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WBT_STATE_ON_MANUAL = 2,
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WBT_STATE_OFF_DEFAULT
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WBT_STATE_ON_DEFAULT = 1, /* on by default */
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WBT_STATE_ON_MANUAL = 2, /* on manually by sysfs */
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WBT_STATE_OFF_DEFAULT = 3, /* off by default */
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WBT_STATE_OFF_MANUAL = 4, /* off manually by sysfs */
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};
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struct rq_wb {
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