Commit 4cdca5a9 authored by Daeho Jeong's avatar Daeho Jeong Committed by Jaegeuk Kim
Browse files

f2fs: add reserved_segments sysfs node 



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

Signed-off-by: default avatarDaeho Jeong <daehojeong@google.com>
Reviewed-by: default avatarChao Yu <chao@kernel.org>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 8c890c4c

Documentation/ABI/testing/sysfs-fs-f2fs

+6 −0
Original line number Diff line number Diff line
@@ -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.

fs/f2fs/sysfs.c

+2 −0
Original line number Diff line number Diff line
@@ -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),