Commit d23be468 authored by qixiaoyu1's avatar qixiaoyu1 Committed by Jaegeuk Kim
Browse files

f2fs: add sysfs nodes to set last_age_weight 



Signed-off-by: default avatarqixiaoyu1 <qixiaoyu1@xiaomi.com>
Signed-off-by: default avatarxiongping1 <xiongping1@xiaomi.com>
Reviewed-by: default avatarChao Yu <chao@kernel.org>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 04d7a7ae

Documentation/ABI/testing/sysfs-fs-f2fs

+5 −0
Original line number Diff line number Diff line
@@ -717,3 +717,8 @@ 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>/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.

fs/f2fs/extent_cache.c

+9 −6
Original line number Diff line number Diff line
@@ -871,19 +871,21 @@ void f2fs_update_read_extent_tree_range_compressed(struct inode *inode, 
}

#endif



static unsigned long long __calculate_block_age(unsigned long long new,

static unsigned long long __calculate_block_age(struct f2fs_sb_info *sbi,

						unsigned long long new,

						unsigned long long old)

{

	unsigned int rem_old, rem_new;

	unsigned long long res;

	unsigned int weight = sbi->last_age_weight;



	res = div_u64_rem(new, 100, &rem_new) * (100 - LAST_AGE_WEIGHT)

		+ div_u64_rem(old, 100, &rem_old) * LAST_AGE_WEIGHT;

	res = div_u64_rem(new, 100, &rem_new) * (100 - weight)

		+ div_u64_rem(old, 100, &rem_old) * weight;



	if (rem_new)

		res += rem_new * (100 - LAST_AGE_WEIGHT) / 100;

		res += rem_new * (100 - weight) / 100;

	if (rem_old)

		res += rem_old * LAST_AGE_WEIGHT / 100;

		res += rem_old * weight / 100;



	return res;

}
@@ -917,7 +919,7 @@ static int __get_new_block_age(struct inode *inode, struct extent_info *ei, 
			cur_age = ULLONG_MAX - tei.last_blocks + cur_blocks;



		if (tei.age)

			ei->age = __calculate_block_age(cur_age, tei.age);

			ei->age = __calculate_block_age(sbi, cur_age, tei.age);

		else

			ei->age = cur_age;

		ei->last_blocks = cur_blocks;
@@ -1244,6 +1246,7 @@ void f2fs_init_extent_cache_info(struct f2fs_sb_info *sbi) 
	atomic64_set(&sbi->allocated_data_blocks, 0);

	sbi->hot_data_age_threshold = DEF_HOT_DATA_AGE_THRESHOLD;

	sbi->warm_data_age_threshold = DEF_WARM_DATA_AGE_THRESHOLD;

	sbi->last_age_weight = LAST_AGE_WEIGHT;

}



int __init f2fs_create_extent_cache(void)

fs/f2fs/f2fs.h

+1 −0
Original line number Diff line number Diff line
@@ -1671,6 +1671,7 @@ struct f2fs_sb_info { 
	/* The threshold used for hot and warm data seperation*/

	unsigned int hot_data_age_threshold;

	unsigned int warm_data_age_threshold;

	unsigned int last_age_weight;



	/* basic filesystem units */

	unsigned int log_sectors_per_block;	/* log2 sectors per block */

fs/f2fs/sysfs.c

+11 −0
Original line number Diff line number Diff line
@@ -697,6 +697,15 @@ static ssize_t __sbi_store(struct f2fs_attr *a, 
		return count;

	}



	if (!strcmp(a->attr.name, "last_age_weight")) {

		if (t > 100)

			return -EINVAL;

		if (t == *ui)

			return count;

		*ui = (unsigned int)t;

		return count;

	}



	*ui = (unsigned int)t;



	return count;
@@ -956,6 +965,7 @@ F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, revoked_atomic_block, revoked_atomic_block) 
/* For block age extent cache */

F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, hot_data_age_threshold, hot_data_age_threshold);

F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, warm_data_age_threshold, warm_data_age_threshold);

F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, last_age_weight, last_age_weight);



#define ATTR_LIST(name) (&f2fs_attr_##name.attr)

static struct attribute *f2fs_attrs[] = {
@@ -1055,6 +1065,7 @@ static struct attribute *f2fs_attrs[] = { 
	ATTR_LIST(revoked_atomic_block),

	ATTR_LIST(hot_data_age_threshold),

	ATTR_LIST(warm_data_age_threshold),

	ATTR_LIST(last_age_weight),

	NULL,

};

ATTRIBUTE_GROUPS(f2fs);