254 lines
7.7 KiB
Plaintext
254 lines
7.7 KiB
Plaintext
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What: /sys/fs/f2fs/<disk>/gc_max_sleep_time
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Date: July 2013
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Contact: "Namjae Jeon" <namjae.jeon@samsung.com>
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Description:
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Controls the maximun sleep time for gc_thread. Time
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is in milliseconds.
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What: /sys/fs/f2fs/<disk>/gc_min_sleep_time
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Date: July 2013
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Contact: "Namjae Jeon" <namjae.jeon@samsung.com>
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Description:
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Controls the minimum sleep time for gc_thread. Time
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is in milliseconds.
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What: /sys/fs/f2fs/<disk>/gc_no_gc_sleep_time
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Date: July 2013
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Contact: "Namjae Jeon" <namjae.jeon@samsung.com>
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Description:
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Controls the default sleep time for gc_thread. Time
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is in milliseconds.
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What: /sys/fs/f2fs/<disk>/gc_idle
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Date: July 2013
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Contact: "Namjae Jeon" <namjae.jeon@samsung.com>
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Description:
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Controls the victim selection policy for garbage collection.
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What: /sys/fs/f2fs/<disk>/reclaim_segments
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Date: October 2013
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Contact: "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
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Description:
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Controls the issue rate of segment discard commands.
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What: /sys/fs/f2fs/<disk>/ipu_policy
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Date: November 2013
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Contact: "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
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Description:
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Controls the in-place-update policy.
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What: /sys/fs/f2fs/<disk>/min_ipu_util
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Date: November 2013
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Contact: "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
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Description:
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Controls the FS utilization condition for the in-place-update
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policies.
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What: /sys/fs/f2fs/<disk>/min_fsync_blocks
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Date: September 2014
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Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
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Description:
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Controls the dirty page count condition for the in-place-update
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policies.
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What: /sys/fs/f2fs/<disk>/min_seq_blocks
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Date: August 2018
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Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
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Description:
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Controls the dirty page count condition for batched sequential
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writes in ->writepages.
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What: /sys/fs/f2fs/<disk>/min_hot_blocks
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Date: March 2017
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Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
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Description:
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Controls the dirty page count condition for redefining hot data.
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What: /sys/fs/f2fs/<disk>/min_ssr_sections
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Date: October 2017
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Contact: "Chao Yu" <yuchao0@huawei.com>
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Description:
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Controls the fee section threshold to trigger SSR allocation.
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What: /sys/fs/f2fs/<disk>/max_small_discards
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Date: November 2013
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Contact: "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
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Description:
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Controls the issue rate of small discard commands.
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What: /sys/fs/f2fs/<disk>/discard_granularity
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Date: July 2017
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Contact: "Chao Yu" <yuchao0@huawei.com>
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Description:
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Controls discard granularity of inner discard thread, inner thread
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will not issue discards with size that is smaller than granularity.
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The unit size is one block, now only support configuring in range
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of [1, 512].
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What: /sys/fs/f2fs/<disk>/umount_discard_timeout
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Date: January 2019
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Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
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Description:
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Set timeout to issue discard commands during umount.
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Default: 5 secs
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What: /sys/fs/f2fs/<disk>/max_victim_search
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Date: January 2014
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Contact: "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
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Description:
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Controls the number of trials to find a victim segment.
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What: /sys/fs/f2fs/<disk>/migration_granularity
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Date: October 2018
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Contact: "Chao Yu" <yuchao0@huawei.com>
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Description:
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Controls migration granularity of garbage collection on large
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section, it can let GC move partial segment{s} of one section
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in one GC cycle, so that dispersing heavy overhead GC to
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multiple lightweight one.
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What: /sys/fs/f2fs/<disk>/dir_level
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Date: March 2014
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Contact: "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
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Description:
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Controls the directory level for large directory.
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What: /sys/fs/f2fs/<disk>/ram_thresh
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Date: March 2014
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Contact: "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
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Description:
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Controls the memory footprint used by f2fs.
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What: /sys/fs/f2fs/<disk>/batched_trim_sections
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Date: February 2015
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Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
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Description:
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Controls the trimming rate in batch mode.
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<deprecated>
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What: /sys/fs/f2fs/<disk>/cp_interval
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Date: October 2015
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Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
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Description:
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Controls the checkpoint timing.
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What: /sys/fs/f2fs/<disk>/idle_interval
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Date: January 2016
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Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
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Description:
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Controls the idle timing for all paths other than
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discard and gc path.
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What: /sys/fs/f2fs/<disk>/discard_idle_interval
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Date: September 2018
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Contact: "Chao Yu" <yuchao0@huawei.com>
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Contact: "Sahitya Tummala" <stummala@codeaurora.org>
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Description:
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Controls the idle timing for discard path.
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What: /sys/fs/f2fs/<disk>/gc_idle_interval
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Date: September 2018
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Contact: "Chao Yu" <yuchao0@huawei.com>
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Contact: "Sahitya Tummala" <stummala@codeaurora.org>
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Description:
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Controls the idle timing for gc path.
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What: /sys/fs/f2fs/<disk>/iostat_enable
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Date: August 2017
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Contact: "Chao Yu" <yuchao0@huawei.com>
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Description:
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Controls to enable/disable IO stat.
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What: /sys/fs/f2fs/<disk>/ra_nid_pages
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Date: October 2015
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Contact: "Chao Yu" <chao2.yu@samsung.com>
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Description:
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Controls the count of nid pages to be readaheaded.
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What: /sys/fs/f2fs/<disk>/dirty_nats_ratio
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Date: January 2016
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Contact: "Chao Yu" <chao2.yu@samsung.com>
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Description:
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Controls dirty nat entries ratio threshold, if current
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ratio exceeds configured threshold, checkpoint will
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be triggered for flushing dirty nat entries.
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What: /sys/fs/f2fs/<disk>/lifetime_write_kbytes
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Date: January 2016
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Contact: "Shuoran Liu" <liushuoran@huawei.com>
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Description:
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Shows total written kbytes issued to disk.
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What: /sys/fs/f2fs/<disk>/feature
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Date: July 2017
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Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
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Description:
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Shows all enabled features in current device.
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What: /sys/fs/f2fs/<disk>/inject_rate
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Date: May 2016
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Contact: "Sheng Yong" <shengyong1@huawei.com>
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Description:
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Controls the injection rate.
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What: /sys/fs/f2fs/<disk>/inject_type
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Date: May 2016
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Contact: "Sheng Yong" <shengyong1@huawei.com>
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Description:
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Controls the injection type.
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What: /sys/fs/f2fs/<disk>/reserved_blocks
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Date: June 2017
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Contact: "Chao Yu" <yuchao0@huawei.com>
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Description:
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Controls target reserved blocks in system, the threshold
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is soft, it could exceed current available user space.
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What: /sys/fs/f2fs/<disk>/current_reserved_blocks
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Date: October 2017
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Contact: "Yunlong Song" <yunlong.song@huawei.com>
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Contact: "Chao Yu" <yuchao0@huawei.com>
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Description:
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Shows current reserved blocks in system, it may be temporarily
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smaller than target_reserved_blocks, but will gradually
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increase to target_reserved_blocks when more free blocks are
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freed by user later.
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What: /sys/fs/f2fs/<disk>/gc_urgent
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Date: August 2017
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Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
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Description:
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Do background GC agressively
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What: /sys/fs/f2fs/<disk>/gc_urgent_sleep_time
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Date: August 2017
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Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
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Description:
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Controls sleep time of GC urgent mode
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What: /sys/fs/f2fs/<disk>/readdir_ra
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Date: November 2017
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Contact: "Sheng Yong" <shengyong1@huawei.com>
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Description:
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Controls readahead inode block in readdir.
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What: /sys/fs/f2fs/<disk>/extension_list
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Date: Feburary 2018
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Contact: "Chao Yu" <yuchao0@huawei.com>
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Description:
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Used to control configure extension list:
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- Query: cat /sys/fs/f2fs/<disk>/extension_list
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- Add: echo '[h/c]extension' > /sys/fs/f2fs/<disk>/extension_list
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- Del: echo '[h/c]!extension' > /sys/fs/f2fs/<disk>/extension_list
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- [h] means add/del hot file extension
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- [c] means add/del cold file extension
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What: /sys/fs/f2fs/<disk>/unusable
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Date April 2019
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Contact: "Daniel Rosenberg" <drosen@google.com>
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Description:
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If checkpoint=disable, it displays the number of blocks that are unusable.
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If checkpoint=enable it displays the enumber of blocks that would be unusable
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if checkpoint=disable were to be set.
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