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f2fs: export compress_percent and compress_watermark entries 

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>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Yangtao Li 2023-02-16 22:09:35 +08:00 committed by Jaegeuk Kim
parent 6063037506
commit 960fa2c828
2 changed files with 35 additions and 0 deletions
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17
Documentation/ABI/testing/sysfs-fs-f2fs
View File

@ -729,3 +729,20 @@ 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: February 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: February 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(%).

18
fs/f2fs/sysfs.c
View File

@ -598,6 +598,20 @@ out:
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),