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block, documentation: Fix wbt_lat_usec documentation
Fix the spelling of the wbt_lat_usec sysfs attribute.
Fixes: 87760e5eef
("block: hook up writeback throttling") # v4.10.
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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@ -185,8 +185,8 @@ This is the number of bytes the device can write in a single write-same
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command. A value of '0' means write-same is not supported by this
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command. A value of '0' means write-same is not supported by this
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device.
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device.
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wb_lat_usec (RW)
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wbt_lat_usec (RW)
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----------------
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-----------------
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If the device is registered for writeback throttling, then this file shows
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If the device is registered for writeback throttling, then this file shows
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the target minimum read latency. If this latency is exceeded in a given
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the target minimum read latency. If this latency is exceeded in a given
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window of time (see wb_window_usec), then the writeback throttling will start
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window of time (see wb_window_usec), then the writeback throttling will start
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