Commit c8705cef authored by Daeho Jeong's avatar Daeho Jeong Committed by Jaegeuk Kim
Browse files

f2fs: add gc_boost_gc_greedy sysfs node 



Add this to control GC algorithm for boost GC.

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 1d4c5dbb

Documentation/ABI/testing/sysfs-fs-f2fs

+6 −0
Original line number Diff line number Diff line
@@ -877,3 +877,9 @@ Contact: "Daeho Jeong" <daehojeong@google.com> 
Description:	Set a multiplier for the background GC migration window when F2FS GC is

		boosted. The range should be from 1 to the segment count in a section.

		Default: 5



What:		/sys/fs/f2fs/<disk>/gc_boost_gc_greedy

Date:		June 2025

Contact:	"Daeho Jeong" <daehojeong@google.com>

Description:	Control GC algorithm for boost GC. 0: cost benefit, 1: greedy

		Default: 1

fs/f2fs/gc.c

+2 −1
Original line number Diff line number Diff line
@@ -141,7 +141,7 @@ static int gc_thread_func(void *data) 
					FOREGROUND : BACKGROUND);



		sync_mode = (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_SYNC) ||

				gc_control.one_time;

			(gc_control.one_time && gc_th->boost_gc_greedy);



		/* foreground GC was been triggered via f2fs_balance_fs() */

		if (foreground && !f2fs_sb_has_blkzoned(sbi))
@@ -198,6 +198,7 @@ int f2fs_start_gc_thread(struct f2fs_sb_info *sbi) 
	gc_th->urgent_sleep_time = DEF_GC_THREAD_URGENT_SLEEP_TIME;

	gc_th->valid_thresh_ratio = DEF_GC_THREAD_VALID_THRESH_RATIO;

	gc_th->boost_gc_multiple = BOOST_GC_MULTIPLE;

	gc_th->boost_gc_greedy = GC_GREEDY;



	if (f2fs_sb_has_blkzoned(sbi)) {

		gc_th->min_sleep_time = DEF_GC_THREAD_MIN_SLEEP_TIME_ZONED;

fs/f2fs/gc.h

+1 −0
Original line number Diff line number Diff line
@@ -69,6 +69,7 @@ struct f2fs_gc_kthread { 
	unsigned int boost_zoned_gc_percent;

	unsigned int valid_thresh_ratio;

	unsigned int boost_gc_multiple;

	unsigned int boost_gc_greedy;

};



struct gc_inode_list {

fs/f2fs/sysfs.c

+9 −0
Original line number Diff line number Diff line
@@ -859,6 +859,13 @@ static ssize_t __sbi_store(struct f2fs_attr *a, 
		return count;

	}



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

		if (t > GC_GREEDY)

			return -EINVAL;

		sbi->gc_thread->boost_gc_greedy = (unsigned int)t;

		return count;

	}



	*ui = (unsigned int)t;



	return count;
@@ -1086,6 +1093,7 @@ GC_THREAD_RW_ATTR(gc_no_zoned_gc_percent, no_zoned_gc_percent); 
GC_THREAD_RW_ATTR(gc_boost_zoned_gc_percent, boost_zoned_gc_percent);

GC_THREAD_RW_ATTR(gc_valid_thresh_ratio, valid_thresh_ratio);

GC_THREAD_RW_ATTR(gc_boost_gc_multiple, boost_gc_multiple);

GC_THREAD_RW_ATTR(gc_boost_gc_greedy, boost_gc_greedy);



/* SM_INFO ATTR */

SM_INFO_RW_ATTR(reclaim_segments, rec_prefree_segments);
@@ -1258,6 +1266,7 @@ static struct attribute *f2fs_attrs[] = { 
	ATTR_LIST(gc_boost_zoned_gc_percent),

	ATTR_LIST(gc_valid_thresh_ratio),

	ATTR_LIST(gc_boost_gc_multiple),

	ATTR_LIST(gc_boost_gc_greedy),

	ATTR_LIST(gc_idle),

	ATTR_LIST(gc_urgent),

	ATTR_LIST(reclaim_segments),