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f2fs: add reserved_segments sysfs node

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For the fine tuning of GC behavior, add reserved_segments sysfs node.

Signed-off-by: Daeho Jeong <daehojeong@google.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Daeho Jeong 2024-09-09 15:19:42 -07:00 committed by Jaegeuk Kim
parent 8c890c4c60
commit 4cdca5a904
2 changed files with 8 additions and 0 deletions
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6
Documentation/ABI/testing/sysfs-fs-f2fs
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@ -791,3 +791,9 @@ Description: Controls migration window granularity of garbage collection on larg
section. it can control the scanning window granularity for GC migration section. it can control the scanning window granularity for GC migration
in a unit of segment, while migration_granularity controls the number in a unit of segment, while migration_granularity controls the number
of segments which can be migrated at the same turn. of segments which can be migrated at the same turn.
What: /sys/fs/f2fs/<disk>/reserved_segments
Date: September 2024
Contact: "Daeho Jeong" <daehojeong@google.com>
Description: In order to fine tune GC behavior, we can control the number of
reserved segments.

2
fs/f2fs/sysfs.c
View File

@ -986,6 +986,7 @@ SM_INFO_GENERAL_RW_ATTR(min_fsync_blocks);
SM_INFO_GENERAL_RW_ATTR(min_seq_blocks); SM_INFO_GENERAL_RW_ATTR(min_seq_blocks);
SM_INFO_GENERAL_RW_ATTR(min_hot_blocks); SM_INFO_GENERAL_RW_ATTR(min_hot_blocks);
SM_INFO_GENERAL_RW_ATTR(min_ssr_sections); SM_INFO_GENERAL_RW_ATTR(min_ssr_sections);
SM_INFO_GENERAL_RW_ATTR(reserved_segments);
/* DCC_INFO ATTR */ /* DCC_INFO ATTR */
DCC_INFO_RW_ATTR(max_small_discards, max_discards); DCC_INFO_RW_ATTR(max_small_discards, max_discards);
@ -1158,6 +1159,7 @@ static struct attribute *f2fs_attrs[] = {
ATTR_LIST(min_seq_blocks), ATTR_LIST(min_seq_blocks),
ATTR_LIST(min_hot_blocks), ATTR_LIST(min_hot_blocks),
ATTR_LIST(min_ssr_sections), ATTR_LIST(min_ssr_sections),
ATTR_LIST(reserved_segments),
ATTR_LIST(max_victim_search), ATTR_LIST(max_victim_search),
ATTR_LIST(migration_granularity), ATTR_LIST(migration_granularity),
ATTR_LIST(migration_window_granularity), ATTR_LIST(migration_window_granularity),