mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-21 08:19:28 +00:00
c1ce1b02bb
If user wrote F2FS_IPU_FSYNC:4 in /sys/fs/f2fs/ipu_policy, f2fs_sync_file only starts to try in-place-updates. And, if the number of dirty pages is over /sys/fs/f2fs/min_fsync_blocks, it keeps out-of-order manner. Otherwise, it triggers in-place-updates. This may be used by storage showing very high random write performance. For example, it can be used when, Seq. writes (Data) + wait + Seq. writes (Node) is pretty much slower than, Rand. writes (Data) Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
76 lines
2.2 KiB
Text
76 lines
2.2 KiB
Text
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>/min_fsync_blocks
|
|
Date: September 2014
|
|
Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
|
|
Description:
|
|
Controls the dirty page count 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.
|
|
|
|
What: /sys/fs/f2fs/<disk>/dir_level
|
|
Date: March 2014
|
|
Contact: "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
|
|
Description:
|
|
Controls the directory level for large directory.
|
|
|
|
What: /sys/fs/f2fs/<disk>/ram_thresh
|
|
Date: March 2014
|
|
Contact: "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
|
|
Description:
|
|
Controls the memory footprint used by f2fs.
|