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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
in a unit of segment, while migration_granularity controls the number
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_hot_blocks);
SM_INFO_GENERAL_RW_ATTR(min_ssr_sections);
SM_INFO_GENERAL_RW_ATTR(reserved_segments);
/* DCC_INFO ATTR */
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_hot_blocks),
ATTR_LIST(min_ssr_sections),
ATTR_LIST(reserved_segments),
ATTR_LIST(max_victim_search),
ATTR_LIST(migration_granularity),
ATTR_LIST(migration_window_granularity),