From: Daeho Jeong <daehoje...@google.com>
Add a sysfs knob to set a multiplier for the background GC migration
window when F2FS Garbage Collection is boosted.
Signed-off-by: Daeho Jeong <daehoje...@google.com>
---
Documentation/ABI/testing/sysfs-fs-f2fs | 7 +++++++
fs/f2fs/gc.c | 3 ++-
fs/f2fs/gc.h | 1 +
fs/f2fs/sysfs.c | 2 ++
4 files changed, 12 insertions(+), 1 deletion(-)
diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs
b/Documentation/ABI/testing/sysfs-fs-f2fs
index bf03263b9f46..0f343cb5cc17 100644
--- a/Documentation/ABI/testing/sysfs-fs-f2fs
+++ b/Documentation/ABI/testing/sysfs-fs-f2fs
@@ -861,3 +861,10 @@ Description: This is a read-only entry to show the
value of sb.s_encoding_flags,
SB_ENC_STRICT_MODE_FL 0x00000001
SB_ENC_NO_COMPAT_FALLBACK_FL 0x00000002
============================ ==========
+
+What: /sys/fs/f2fs/<disk>/gc_boost_gc_multiple
+Date: June 2025
+Contact: "Daeho Jeong" <daehoje...@google.com>
+Description: Set a multiplier for the background GC migration window when
F2FS GC is
+ boosted.
+
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index 3cb5242f4ddf..de7e59bc0906 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -197,6 +197,7 @@ 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;
if (f2fs_sb_has_blkzoned(sbi)) {
gc_th->min_sleep_time = DEF_GC_THREAD_MIN_SLEEP_TIME_ZONED;
@@ -1749,7 +1750,7 @@ static int do_garbage_collect(struct f2fs_sb_info *sbi,
!has_enough_free_blocks(sbi,
sbi->gc_thread->boost_zoned_gc_percent))
window_granularity *=
- BOOST_GC_MULTIPLE;
+ sbi->gc_thread->boost_gc_multiple;
end_segno = start_segno + window_granularity;
}
diff --git a/fs/f2fs/gc.h b/fs/f2fs/gc.h
index 5c1eaf55e127..efa1968810a0 100644
--- a/fs/f2fs/gc.h
+++ b/fs/f2fs/gc.h
@@ -68,6 +68,7 @@ struct f2fs_gc_kthread {
unsigned int no_zoned_gc_percent;
unsigned int boost_zoned_gc_percent;
unsigned int valid_thresh_ratio;
+ unsigned int boost_gc_multiple;
};
struct gc_inode_list {
diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c
index 75134d69a0bd..b0270b1c939c 100644
--- a/fs/f2fs/sysfs.c
+++ b/fs/f2fs/sysfs.c
@@ -1050,6 +1050,7 @@ GC_THREAD_RW_ATTR(gc_no_gc_sleep_time, no_gc_sleep_time);
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);
/* SM_INFO ATTR */
SM_INFO_RW_ATTR(reclaim_segments, rec_prefree_segments);
@@ -1220,6 +1221,7 @@ static struct attribute *f2fs_attrs[] = {
ATTR_LIST(gc_no_zoned_gc_percent),
ATTR_LIST(gc_boost_zoned_gc_percent),
ATTR_LIST(gc_valid_thresh_ratio),
+ ATTR_LIST(gc_boost_gc_multiple),
ATTR_LIST(gc_idle),
ATTR_LIST(gc_urgent),
ATTR_LIST(reclaim_segments),
--
2.50.0.rc0.604.gd4ff7b7c86-goog
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