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]>
---
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 75420c242cc4..920562742655 100644
--- a/Documentation/ABI/testing/sysfs-fs-f2fs
+++ b/Documentation/ABI/testing/sysfs-fs-f2fs
@@ -717,3 +717,20 @@ Description: Controls background discard granularity of inner discard thread
is smaller than granularity. The unit size is one block(4KB), now only
support configuring in range of [0, 512].
Default: 512
+
+what: /sys/fs/f2fs/<disk>/compress_watermark
+date: january 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: january 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 e396851a6dd1..37c6ef080f7e 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 > 100)
+ return -EINVAL;
+ *ui = t;
+ return count;
+ }
+
+ if (!strcmp(a->attr.name, "compress_watermark")) {
+ if (t > 100)
+ return -EINVAL;
+ *ui = t;
+ return count;
+ }
#endif
if (!strcmp(a->attr.name, "atgc_candidate_ratio")) {
@@ -932,6 +946,8 @@ 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);
@@ -1038,6 +1054,8 @@ 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
On 01/17, Yangtao Li wrote:
> 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]>
> ---
> 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 75420c242cc4..920562742655 100644
> --- a/Documentation/ABI/testing/sysfs-fs-f2fs
> +++ b/Documentation/ABI/testing/sysfs-fs-f2fs
> @@ -717,3 +717,20 @@ Description: Controls background discard granularity of inner discard thread
> is smaller than granularity. The unit size is one block(4KB), now only
> support configuring in range of [0, 512].
> Default: 512
> +
> +what: /sys/fs/f2fs/<disk>/compress_watermark
> +date: january 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: january 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 e396851a6dd1..37c6ef080f7e 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 > 100)
t=0 also doesn't make sense.
> + return -EINVAL;
> + *ui = t;
> + return count;
> + }
> +
> + if (!strcmp(a->attr.name, "compress_watermark")) {
> + if (t > 100)
> + return -EINVAL;
> + *ui = t;
> + return count;
> + }
> #endif
>
> if (!strcmp(a->attr.name, "atgc_candidate_ratio")) {
> @@ -932,6 +946,8 @@ 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);
>
> @@ -1038,6 +1054,8 @@ 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