From 960fa2c828a0af7a3b03b295e6aa17b2afeb5e07 Mon Sep 17 00:00:00 2001 From: Yangtao Li Date: Thu, 16 Feb 2023 22:09:35 +0800 Subject: [PATCH] f2fs: export compress_percent and compress_watermark entries This patch export below sysfs entries for better control cached compress page count. /sys/fs/f2fs//compress_watermark /sys/fs/f2fs//compress_percent Signed-off-by: Yangtao Li Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim --- 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 9413274..c1314b7 100644 --- a/Documentation/ABI/testing/sysfs-fs-f2fs +++ b/Documentation/ABI/testing/sysfs-fs-f2fs @@ -729,3 +729,20 @@ What: /sys/fs/f2fs//last_age_weight Date: January 2023 Contact: "Ping Xiong" Description: When DATA SEPARATION is on, it controls the weight of last data block age. + +What: /sys/fs/f2fs//compress_watermark +Date: February 2023 +Contact: "Yangtao Li" +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//compress_percent +Date: February 2023 +Contact: "Yangtao Li" +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 0b19163..5397bd8 100644 --- a/fs/f2fs/sysfs.c +++ b/fs/f2fs/sysfs.c @@ -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), -- 2.7.4