diff options
Diffstat (limited to 'Documentation/ABI/testing/sysfs-fs-f2fs')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-fs-f2fs | 82 |
1 files changed, 78 insertions, 4 deletions
diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs index 4849b8e84e42..f627e705e663 100644 --- a/Documentation/ABI/testing/sysfs-fs-f2fs +++ b/Documentation/ABI/testing/sysfs-fs-f2fs @@ -41,8 +41,7 @@ Description: This parameter controls the number of prefree segments to be What: /sys/fs/f2fs/<disk>/main_blkaddr Date: November 2019 Contact: "Ramon Pantin" <pantin@google.com> -Description: - Shows first block address of MAIN area. +Description: Shows first block address of MAIN area. What: /sys/fs/f2fs/<disk>/ipu_policy Date: November 2013 @@ -203,7 +202,34 @@ 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. +Description: <deprecated: should use /sys/fs/f2fs/<disk>/feature_list/ + Shows all enabled features in current device. + Supported features: + encryption, blkzoned, extra_attr, projquota, inode_checksum, + flexible_inline_xattr, quota_ino, inode_crtime, lost_found, + verity, sb_checksum, casefold, readonly, compression, pin_file. + +What: /sys/fs/f2fs/<disk>/feature_list/ +Date: June 2021 +Contact: "Jaegeuk Kim" <jaegeuk@kernel.org> +Description: Expand /sys/fs/f2fs/<disk>/features to meet sysfs rule. + Supported on-disk features: + encryption, block_zoned (aka blkzoned), extra_attr, + project_quota (aka projquota), inode_checksum, + flexible_inline_xattr, quota_ino, inode_crtime, lost_found, + verity, sb_checksum, casefold, readonly, compression. + Note that, pin_file is moved into /sys/fs/f2fs/features/. + +What: /sys/fs/f2fs/features/ +Date: July 2017 +Contact: "Jaegeuk Kim" <jaegeuk@kernel.org> +Description: Shows all enabled kernel features. + Supported features: + encryption, block_zoned, extra_attr, project_quota, + inode_checksum, flexible_inline_xattr, quota_ino, + inode_crtime, lost_found, verity, sb_checksum, + casefold, readonly, compression, test_dummy_encryption_v2, + atomic_write, pin_file, encrypted_casefold. What: /sys/fs/f2fs/<disk>/inject_rate Date: May 2016 @@ -238,7 +264,7 @@ Description: Shows current reserved blocks in system, it may be temporarily What: /sys/fs/f2fs/<disk>/gc_urgent Date: August 2017 Contact: "Jaegeuk Kim" <jaegeuk@kernel.org> -Description: Do background GC agressively when set. When gc_urgent = 1, +Description: Do background GC aggressively when set. When gc_urgent = 1, background thread starts to do GC by given gc_urgent_sleep_time interval. When gc_urgent = 2, F2FS will lower the bar of checking idle in order to process outstanding discard commands @@ -438,3 +464,51 @@ Description: Show the count of inode newly enabled for compression since mount. Note that when the compression is disabled for the files, this count doesn't decrease. If you write "0" here, you can initialize compr_new_inode to "0". + +What: /sys/fs/f2fs/<disk>/atgc_candidate_ratio +Date: May 2021 +Contact: "Chao Yu" <yuchao0@huawei.com> +Description: When ATGC is on, it controls candidate ratio in order to limit total + number of potential victim in all candidates, the value should be in + range of [0, 100], by default it was initialized as 20(%). + +What: /sys/fs/f2fs/<disk>/atgc_candidate_count +Date: May 2021 +Contact: "Chao Yu" <yuchao0@huawei.com> +Description: When ATGC is on, it controls candidate count in order to limit total + number of potential victim in all candidates, by default it was + initialized as 10 (sections). + +What: /sys/fs/f2fs/<disk>/atgc_age_weight +Date: May 2021 +Contact: "Chao Yu" <yuchao0@huawei.com> +Description: When ATGC is on, it controls age weight to balance weight proportion + in between aging and valid blocks, the value should be in range of + [0, 100], by default it was initialized as 60(%). + +What: /sys/fs/f2fs/<disk>/atgc_age_threshold +Date: May 2021 +Contact: "Chao Yu" <yuchao0@huawei.com> +Description: When ATGC is on, it controls age threshold to bypass GCing young + candidates whose age is not beyond the threshold, by default it was + initialized as 604800 seconds (equals to 7 days). + +What: /sys/fs/f2fs/<disk>/gc_reclaimed_segments +Date: July 2021 +Contact: "Daeho Jeong" <daehojeong@google.com> +Description: Show how many segments have been reclaimed by GC during a specific + GC mode (0: GC normal, 1: GC idle CB, 2: GC idle greedy, + 3: GC idle AT, 4: GC urgent high, 5: GC urgent low) + You can re-initialize this value to "0". + +What: /sys/fs/f2fs/<disk>/gc_segment_mode +Date: July 2021 +Contact: "Daeho Jeong" <daehojeong@google.com> +Description: You can control for which gc mode the "gc_reclaimed_segments" node shows. + Refer to the description of the modes in "gc_reclaimed_segments". + +What: /sys/fs/f2fs/<disk>/seq_file_ra_mul +Date: July 2021 +Contact: "Daeho Jeong" <daehojeong@google.com> +Description: You can control the multiplier value of bdi device readahead window size + between 2 (default) and 256 for POSIX_FADV_SEQUENTIAL advise option. |