From: Daeho Jeong <daehoje...@google.com>
Added control knobs for gc_no_zoned_gc_percent and
gc_boost_zoned_gc_percent.
Signed-off-by: Daeho Jeong <daehoje...@google.com>
---
Documentation/ABI/testing/sysfs-fs-f2fs | 14 ++++++++++++++
fs/f2fs/gc.c | 12 +++++++++---
fs/f2fs/gc.h | 4 ++++
fs/f2fs/sysfs.c | 4 ++++
4 files changed, 31 insertions(+), 3 deletions(-)
diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs
b/Documentation/ABI/testing/sysfs-fs-f2fs
index 4fcd0f824bde..265baec879fd 100644
--- a/Documentation/ABI/testing/sysfs-fs-f2fs
+++ b/Documentation/ABI/testing/sysfs-fs-f2fs
@@ -769,3 +769,17 @@ Date: August 2024
Contact: "Daeho Jeong" <daehoje...@google.com>
Description: In order to fine tune GC behavior, we can control the number of
reserved segments.
+
+What: /sys/fs/f2fs/<disk>/gc_no_zoned_gc_percent
+Date: August 2024
+Contact: "Daeho Jeong" <daehoje...@google.com>
+Description: If the percentage of free sections over total sections is above
this
+ number, F2FS do not garbage collection for zoned devices
through the
+ background GC thread. the default number is "60".
+
+What: /sys/fs/f2fs/<disk>/gc_boost_zoned_gc_percent
+Date: August 2024
+Contact: "Daeho Jeong" <daehoje...@google.com>
+Description: If the percentage of free sections over total sections is under
this
+ number, F2FS boosts garbage collection for zoned devices
through the
+ background GC thread. the default number is "25".
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index 37b47a8d95f1..6b79c43a57e3 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -119,7 +119,8 @@ static int gc_thread_func(void *data)
}
if (f2fs_sb_has_blkzoned(sbi)) {
- if (has_enough_free_blocks(sbi, LIMIT_NO_ZONED_GC)) {
+ if (has_enough_free_blocks(sbi,
+ gc_th->no_zoned_gc_percent)) {
wait_ms = gc_th->no_gc_sleep_time;
f2fs_up_write(&sbi->gc_lock);
goto next;
@@ -200,10 +201,14 @@ int f2fs_start_gc_thread(struct f2fs_sb_info *sbi)
gc_th->min_sleep_time = DEF_GC_THREAD_MIN_SLEEP_TIME_ZONED;
gc_th->max_sleep_time = DEF_GC_THREAD_MAX_SLEEP_TIME_ZONED;
gc_th->no_gc_sleep_time = DEF_GC_THREAD_NOGC_SLEEP_TIME_ZONED;
+ gc_th->no_zoned_gc_percent = LIMIT_NO_ZONED_GC;
+ gc_th->boost_zoned_gc_percent = LIMIT_BOOST_ZONED_GC;
} else {
gc_th->min_sleep_time = DEF_GC_THREAD_MIN_SLEEP_TIME;
gc_th->max_sleep_time = DEF_GC_THREAD_MAX_SLEEP_TIME;
gc_th->no_gc_sleep_time = DEF_GC_THREAD_NOGC_SLEEP_TIME;
+ gc_th->no_zoned_gc_percent = 0;
+ gc_th->boost_zoned_gc_percent = 0;
}
gc_th->gc_wake = false;
@@ -1740,8 +1745,9 @@ static int do_garbage_collect(struct f2fs_sb_info *sbi,
if (f2fs_sb_has_blkzoned(sbi) &&
!has_enough_free_blocks(sbi,
- LIMIT_BOOST_ZONED_GC))
- migration_granularity *= BOOST_GC_MULTIPLE;
+ sbi->gc_thread->boost_zoned_gc_percent))
+ migration_granularity *=
+ BOOST_GC_MULTIPLE;
end_segno = start_segno + migration_granularity;
}
diff --git a/fs/f2fs/gc.h b/fs/f2fs/gc.h
index 33848d550153..e8195eb4ca6d 100644
--- a/fs/f2fs/gc.h
+++ b/fs/f2fs/gc.h
@@ -61,6 +61,10 @@ struct f2fs_gc_kthread {
* caller of f2fs_balance_fs()
* will wait on this wait queue.
*/
+
+ /* for gc control for zoned devices */
+ unsigned int no_zoned_gc_percent;
+ unsigned int boost_zoned_gc_percent;
};
struct gc_inode_list {
diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c
index 2ed773132f40..647f6660f4df 100644
--- a/fs/f2fs/sysfs.c
+++ b/fs/f2fs/sysfs.c
@@ -960,6 +960,8 @@ GC_THREAD_RW_ATTR(gc_urgent_sleep_time, urgent_sleep_time);
GC_THREAD_RW_ATTR(gc_min_sleep_time, min_sleep_time);
GC_THREAD_RW_ATTR(gc_max_sleep_time, max_sleep_time);
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);
/* SM_INFO ATTR */
SM_INFO_RW_ATTR(reclaim_segments, rec_prefree_segments);
@@ -1117,6 +1119,8 @@ static struct attribute *f2fs_attrs[] = {
ATTR_LIST(gc_min_sleep_time),
ATTR_LIST(gc_max_sleep_time),
ATTR_LIST(gc_no_gc_sleep_time),
+ ATTR_LIST(gc_no_zoned_gc_percent),
+ ATTR_LIST(gc_boost_zoned_gc_percent),
ATTR_LIST(gc_idle),
ATTR_LIST(gc_urgent),
ATTR_LIST(reclaim_segments),
--
2.46.0.469.g59c65b2a67-goog
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