* [PATCH] f2fs: add gc_boost_gc_greedy sysfs node
@ 2025-06-06 21:59 Daeho Jeong
2025-06-07 11:24 ` [f2fs-dev] " Chao Yu
0 siblings, 1 reply; 2+ messages in thread
From: Daeho Jeong @ 2025-06-06 21:59 UTC (permalink / raw)
To: linux-kernel, linux-f2fs-devel, kernel-team; +Cc: Daeho Jeong
From: Daeho Jeong <daehojeong@google.com>
Add this to control GC algorithm for boost GC.
Signed-off-by: Daeho Jeong <daehojeong@google.com>
---
Documentation/ABI/testing/sysfs-fs-f2fs | 6 ++++++
fs/f2fs/gc.c | 3 ++-
fs/f2fs/gc.h | 1 +
fs/f2fs/sysfs.c | 7 +++++++
4 files changed, 16 insertions(+), 1 deletion(-)
diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs
index 931c1f63aa2e..b978d183f5b1 100644
--- a/Documentation/ABI/testing/sysfs-fs-f2fs
+++ b/Documentation/ABI/testing/sysfs-fs-f2fs
@@ -869,3 +869,9 @@ Description: Set a multiplier for the background GC migration window when F2FS G
boosted.
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
+
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index de7e59bc0906..31afee3af1a0 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -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)
@@ -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 = 1;
if (f2fs_sb_has_blkzoned(sbi)) {
gc_th->min_sleep_time = DEF_GC_THREAD_MIN_SLEEP_TIME_ZONED;
diff --git a/fs/f2fs/gc.h b/fs/f2fs/gc.h
index efa1968810a0..1a2e7a84b59f 100644
--- a/fs/f2fs/gc.h
+++ b/fs/f2fs/gc.h
@@ -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 {
diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c
index b0270b1c939c..5de7cd5c4fd8 100644
--- a/fs/f2fs/sysfs.c
+++ b/fs/f2fs/sysfs.c
@@ -824,6 +824,11 @@ static ssize_t __sbi_store(struct f2fs_attr *a,
return count;
}
+ if (!strcmp(a->attr.name, "gc_boost_gc_greedy")) {
+ if (t > 1)
+ return -EINVAL;
+ }
+
*ui = (unsigned int)t;
return count;
@@ -1051,6 +1056,7 @@ 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);
@@ -1222,6 +1228,7 @@ 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),
--
2.50.0.rc0.604.gd4ff7b7c86-goog
^ permalink raw reply [flat|nested] 2+ messages in thread* Re: [f2fs-dev] [PATCH] f2fs: add gc_boost_gc_greedy sysfs node
2025-06-06 21:59 [PATCH] f2fs: add gc_boost_gc_greedy sysfs node Daeho Jeong
@ 2025-06-07 11:24 ` Chao Yu
0 siblings, 0 replies; 2+ messages in thread
From: Chao Yu @ 2025-06-07 11:24 UTC (permalink / raw)
To: Daeho Jeong, linux-kernel, linux-f2fs-devel, kernel-team
Cc: chao, Daeho Jeong
On 2025/6/7 5:59, Daeho Jeong wrote:
> From: Daeho Jeong <daehojeong@google.com>
>
> Add this to control GC algorithm for boost GC.
>
> Signed-off-by: Daeho Jeong <daehojeong@google.com>
> ---
> Documentation/ABI/testing/sysfs-fs-f2fs | 6 ++++++
> fs/f2fs/gc.c | 3 ++-
> fs/f2fs/gc.h | 1 +
> fs/f2fs/sysfs.c | 7 +++++++
> 4 files changed, 16 insertions(+), 1 deletion(-)
>
> diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs
> index 931c1f63aa2e..b978d183f5b1 100644
> --- a/Documentation/ABI/testing/sysfs-fs-f2fs
> +++ b/Documentation/ABI/testing/sysfs-fs-f2fs
> @@ -869,3 +869,9 @@ Description: Set a multiplier for the background GC migration window when F2FS G
> boosted.
> 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
> +
> diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
> index de7e59bc0906..31afee3af1a0 100644
> --- a/fs/f2fs/gc.c
> +++ b/fs/f2fs/gc.c
> @@ -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)
> @@ -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 = 1;
How about using GC_GREEDY macro instead?
>
> if (f2fs_sb_has_blkzoned(sbi)) {
> gc_th->min_sleep_time = DEF_GC_THREAD_MIN_SLEEP_TIME_ZONED;
> diff --git a/fs/f2fs/gc.h b/fs/f2fs/gc.h
> index efa1968810a0..1a2e7a84b59f 100644
> --- a/fs/f2fs/gc.h
> +++ b/fs/f2fs/gc.h
> @@ -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 {
> diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c
> index b0270b1c939c..5de7cd5c4fd8 100644
> --- a/fs/f2fs/sysfs.c
> +++ b/fs/f2fs/sysfs.c
> @@ -824,6 +824,11 @@ static ssize_t __sbi_store(struct f2fs_attr *a,
> return count;
> }
>
> + if (!strcmp(a->attr.name, "gc_boost_gc_greedy")) {
> + if (t > 1)
Ditto,
Thanks,
> + return -EINVAL;
> + }
> +
> *ui = (unsigned int)t;
>
> return count;
> @@ -1051,6 +1056,7 @@ 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);
> @@ -1222,6 +1228,7 @@ 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),
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2025-06-07 11:24 UTC | newest]
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2025-06-06 21:59 [PATCH] f2fs: add gc_boost_gc_greedy sysfs node Daeho Jeong
2025-06-07 11:24 ` [f2fs-dev] " Chao Yu
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