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What:		/sys/fs/f2fs/<disk>/gc_max_sleep_time
Date:		July 2013
Contact:	"Namjae Jeon" <namjae.jeon@samsung.com>
Description:
		 Controls the maximun sleep time for gc_thread. Time
		 is in milliseconds.

What:		/sys/fs/f2fs/<disk>/gc_min_sleep_time
Date:		July 2013
Contact:	"Namjae Jeon" <namjae.jeon@samsung.com>
Description:
		 Controls the minimum sleep time for gc_thread. Time
		 is in milliseconds.

What:		/sys/fs/f2fs/<disk>/gc_no_gc_sleep_time
Date:		July 2013
Contact:	"Namjae Jeon" <namjae.jeon@samsung.com>
Description:
		 Controls the default sleep time for gc_thread. Time
		 is in milliseconds.

What:		/sys/fs/f2fs/<disk>/gc_idle
Date:		July 2013
Contact:	"Namjae Jeon" <namjae.jeon@samsung.com>
Description:
		 Controls the victim selection policy for garbage collection.

What:		/sys/fs/f2fs/<disk>/reclaim_segments
Date:		October 2013
Contact:	"Jaegeuk Kim" <jaegeuk.kim@samsung.com>
Description:
		 Controls the issue rate of segment discard commands.

What:		/sys/fs/f2fs/<disk>/ipu_policy
Date:		November 2013
Contact:	"Jaegeuk Kim" <jaegeuk.kim@samsung.com>
Description:
		 Controls the in-place-update policy.

What:		/sys/fs/f2fs/<disk>/min_ipu_util
Date:		November 2013
Contact:	"Jaegeuk Kim" <jaegeuk.kim@samsung.com>
Description:
		 Controls the FS utilization condition for the in-place-update
		 policies.

What:		/sys/fs/f2fs/<disk>/max_small_discards
Date:		November 2013
Contact:	"Jaegeuk Kim" <jaegeuk.kim@samsung.com>
Description:
		 Controls the issue rate of small discard commands.

What:		/sys/fs/f2fs/<disk>/max_victim_search
Date:		January 2014
Contact:	"Jaegeuk Kim" <jaegeuk.kim@samsung.com>
Description:
		 Controls the number of trials to find a victim segment.

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