Cc: Jens Axboe <axboe@kernel.dk> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Tao Ma <boyu.mt@taobao.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
		
			
				
	
	
		
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What:		/sys/block/<device>/iosched/target_latency
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Date:		March 2012
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contact:	Tao Ma <boyu.mt@taobao.com>
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Description:
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		The /sys/block/<device>/iosched/target_latency only exists
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		when the user sets cfq to /sys/block/<device>/scheduler.
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		It contains an estimated latency time for the cfq. cfq will
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		use it to calculate the time slice used for every task.
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