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Diffstat (limited to 'Documentation/ABI/testing/sysfs-fs-f2fs')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-fs-f2fs | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs new file mode 100644 index 000000000..94a24aedc --- /dev/null +++ b/Documentation/ABI/testing/sysfs-fs-f2fs @@ -0,0 +1,214 @@ +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>/min_seq_blocks +Date: August 2018 +Contact: "Jaegeuk Kim" <jaegeuk@kernel.org> +Description: + Controls the dirty page count condition for batched sequential + writes in ->writepages. + + +What: /sys/fs/f2fs/<disk>/min_hot_blocks +Date: March 2017 +Contact: "Jaegeuk Kim" <jaegeuk@kernel.org> +Description: + Controls the dirty page count condition for redefining hot data. + +What: /sys/fs/f2fs/<disk>/min_ssr_sections +Date: October 2017 +Contact: "Chao Yu" <yuchao0@huawei.com> +Description: + Controls the fee section threshold to trigger SSR allocation. + +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>/discard_granularity +Date: July 2017 +Contact: "Chao Yu" <yuchao0@huawei.com> +Description: + Controls discard granularity of inner discard thread, inner thread + will not issue discards with size that is smaller than granularity. + The unit size is one block, now only support configuring in range + of [1, 512]. + +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. + +What: /sys/fs/f2fs/<disk>/batched_trim_sections +Date: February 2015 +Contact: "Jaegeuk Kim" <jaegeuk@kernel.org> +Description: + Controls the trimming rate in batch mode. + <deprecated> + +What: /sys/fs/f2fs/<disk>/cp_interval +Date: October 2015 +Contact: "Jaegeuk Kim" <jaegeuk@kernel.org> +Description: + Controls the checkpoint timing. + +What: /sys/fs/f2fs/<disk>/idle_interval +Date: January 2016 +Contact: "Jaegeuk Kim" <jaegeuk@kernel.org> +Description: + Controls the idle timing. + +What: /sys/fs/f2fs/<disk>/iostat_enable +Date: August 2017 +Contact: "Chao Yu" <yuchao0@huawei.com> +Description: + Controls to enable/disable IO stat. + +What: /sys/fs/f2fs/<disk>/ra_nid_pages +Date: October 2015 +Contact: "Chao Yu" <chao2.yu@samsung.com> +Description: + Controls the count of nid pages to be readaheaded. + +What: /sys/fs/f2fs/<disk>/dirty_nats_ratio +Date: January 2016 +Contact: "Chao Yu" <chao2.yu@samsung.com> +Description: + Controls dirty nat entries ratio threshold, if current + ratio exceeds configured threshold, checkpoint will + be triggered for flushing dirty nat entries. + +What: /sys/fs/f2fs/<disk>/lifetime_write_kbytes +Date: January 2016 +Contact: "Shuoran Liu" <liushuoran@huawei.com> +Description: + Shows total written kbytes issued to disk. + +What: /sys/fs/f2fs/<disk>/features +Date: July 2017 +Contact: "Jaegeuk Kim" <jaegeuk@kernel.org> +Description: + Shows all enabled features in current device. + +What: /sys/fs/f2fs/<disk>/inject_rate +Date: May 2016 +Contact: "Sheng Yong" <shengyong1@huawei.com> +Description: + Controls the injection rate. + +What: /sys/fs/f2fs/<disk>/inject_type +Date: May 2016 +Contact: "Sheng Yong" <shengyong1@huawei.com> +Description: + Controls the injection type. + +What: /sys/fs/f2fs/<disk>/reserved_blocks +Date: June 2017 +Contact: "Chao Yu" <yuchao0@huawei.com> +Description: + Controls target reserved blocks in system, the threshold + is soft, it could exceed current available user space. + +What: /sys/fs/f2fs/<disk>/current_reserved_blocks +Date: October 2017 +Contact: "Yunlong Song" <yunlong.song@huawei.com> +Contact: "Chao Yu" <yuchao0@huawei.com> +Description: + Shows current reserved blocks in system, it may be temporarily + smaller than target_reserved_blocks, but will gradually + increase to target_reserved_blocks when more free blocks are + freed by user later. + +What: /sys/fs/f2fs/<disk>/gc_urgent +Date: August 2017 +Contact: "Jaegeuk Kim" <jaegeuk@kernel.org> +Description: + Do background GC agressively + +What: /sys/fs/f2fs/<disk>/gc_urgent_sleep_time +Date: August 2017 +Contact: "Jaegeuk Kim" <jaegeuk@kernel.org> +Description: + Controls sleep time of GC urgent mode + +What: /sys/fs/f2fs/<disk>/readdir_ra +Date: November 2017 +Contact: "Sheng Yong" <shengyong1@huawei.com> +Description: + Controls readahead inode block in readdir. + +What: /sys/fs/f2fs/<disk>/extension_list +Date: Feburary 2018 +Contact: "Chao Yu" <yuchao0@huawei.com> +Description: + Used to control configure extension list: + - Query: cat /sys/fs/f2fs/<disk>/extension_list + - Add: echo '[h/c]extension' > /sys/fs/f2fs/<disk>/extension_list + - Del: echo '[h/c]!extension' > /sys/fs/f2fs/<disk>/extension_list + - [h] means add/del hot file extension + - [c] means add/del cold file extension |