Messages in this thread Patch in this message | | | From | Yangtao Li <> | Subject | [PATCH v2] f2fs: export compress_percent and compress_watermark entries | Date | Fri, 20 Jan 2023 23:15:39 +0800 |
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This patch export below sysfs entries for better control cached compress page count.
/sys/fs/f2fs/<disk>/compress_watermark /sys/fs/f2fs/<disk>/compress_percent
Signed-off-by: Yangtao Li <frank.li@vivo.com> --- v2: disallow to set 0 Documentation/ABI/testing/sysfs-fs-f2fs | 17 +++++++++++++++++ fs/f2fs/sysfs.c | 18 ++++++++++++++++++ 2 files changed, 35 insertions(+)
diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs index 0f17adc80488..e8b1c5b8c370 100644 --- a/Documentation/ABI/testing/sysfs-fs-f2fs +++ b/Documentation/ABI/testing/sysfs-fs-f2fs @@ -722,3 +722,20 @@ What: /sys/fs/f2fs/<disk>/last_age_weight Date: January 2023 Contact: "Ping Xiong" <xiongping1@xiaomi.com> Description: When DATA SEPARATION is on, it controls the weight of last data block age. + +what: /sys/fs/f2fs/<disk>/compress_watermark +Date: January 2023 +Contact: "Yangtao Li" <frank.li@vivo.com> +description: when compress_cache is on, it controls free memory watermark + in order to limit caching compress page. If free memory is lower + than watermark, then deny caching compress page. The value should be in + range of (0, 100], by default it was initialized as 20(%). + +what: /sys/fs/f2fs/<disk>/compress_percent +Date: January 2023 +Contact: "Yangtao Li" <frank.li@vivo.com> +description: when compress_cache is on, it controls cached page + percent(compress pages / free_ram) in order to limit caching compress page. + If cached page percent exceed threshold, then deny caching compress page. + The value should be in range of (0, 100], by default it was initialized + as 20(%). diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c index bdc761f36310..69330a9709c9 100644 --- a/fs/f2fs/sysfs.c +++ b/fs/f2fs/sysfs.c @@ -598,6 +598,20 @@ static ssize_t __sbi_store(struct f2fs_attr *a, sbi->compr_new_inode = 0; return count; } + + if (!strcmp(a->attr.name, "compress_percent")) { + if (t == 0 || t > 100) + return -EINVAL; + *ui = t; + return count; + } + + if (!strcmp(a->attr.name, "compress_watermark")) { + if (t == 0 || t > 100) + return -EINVAL; + *ui = t; + return count; + } #endif if (!strcmp(a->attr.name, "atgc_candidate_ratio")) { @@ -941,6 +955,8 @@ F2FS_FEATURE_RO_ATTR(compression); F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, compr_written_block, compr_written_block); F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, compr_saved_block, compr_saved_block); F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, compr_new_inode, compr_new_inode); +F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, compress_percent, compress_percent); +F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, compress_watermark, compress_watermark); #endif F2FS_FEATURE_RO_ATTR(pin_file); @@ -1048,6 +1064,8 @@ static struct attribute *f2fs_attrs[] = { ATTR_LIST(compr_written_block), ATTR_LIST(compr_saved_block), ATTR_LIST(compr_new_inode), + ATTR_LIST(compress_percent), + ATTR_LIST(compress_watermark), #endif /* For ATGC */ ATTR_LIST(atgc_candidate_ratio), -- 2.25.1
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