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 <[email protected]> --- 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 94132745ecbe..c1314b7fe544 100644 --- a/Documentation/ABI/testing/sysfs-fs-f2fs +++ b/Documentation/ABI/testing/sysfs-fs-f2fs @@ -729,3 +729,20 @@ What: /sys/fs/f2fs/<disk>/last_age_weight Date: January 2023 Contact: "Ping Xiong" <[email protected]> Description: When DATA SEPARATION is on, it controls the weight of last data block age. + +What: /sys/fs/f2fs/<disk>/compress_watermark +Date: February 2023 +Contact: "Yangtao Li" <[email protected]> +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: February 2023 +Contact: "Yangtao Li" <[email protected]> +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 0b19163c90d4..5397bd8bfcf7 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")) { @@ -950,6 +964,8 @@ 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); @@ -1057,6 +1073,8 @@ 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 _______________________________________________ Linux-f2fs-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
