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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>
This commit is contained in:
Bart Van Assche 2019-06-28 13:07:42 -07:00 committed by Jens Axboe
parent 152c762e92
commit 152c7776b9
1 changed files with 2 additions and 2 deletions
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4
Documentation/block/queue-sysfs.txt
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@ -185,8 +185,8 @@ This is the number of bytes the device can write in a single write-same
command. A value of '0' means write-same is not supported by this command. A value of '0' means write-same is not supported by this
device. device.
wb_lat_usec (RW) wbt_lat_usec (RW)
---------------- -----------------
If the device is registered for writeback throttling, then this file shows If the device is registered for writeback throttling, then this file shows
the target minimum read latency. If this latency is exceeded in a given the target minimum read latency. If this latency is exceeded in a given
window of time (see wb_window_usec), then the writeback throttling will start window of time (see wb_window_usec), then the writeback throttling will start