[f2fs-dev] [PATCH v2 1/2] f2fs: fix gc mode when gc_urgent_high_remaining is 1

[f2fs-dev] [PATCH v2 1/2] f2fs: fix gc mode when gc_urgent_high_remaining is 1

[Yangtao Li via Linux-f2fs-devel]

Under the current logic, when gc_urgent_high_remaining is set to 1,
the mode will be switched to normal at the beginning, instead of
running in gc_urgent mode.

Let's switch the gc mode back to normal when the gc ends.

Fixes: 265576181b4a ("f2fs: remove gc_urgent_high_limited for cleanup")

Signed-off-by: Yangtao Li <frank.li@vivo.com>
---
 fs/f2fs/gc.c | 19 +++++++++----------
 1 file changed, 9 insertions(+), 10 deletions(-)

diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index 4546e01b2ee0..e0ff99c7e3f2 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -96,16 +96,6 @@ static int gc_thread_func(void *data)
 		 * invalidated soon after by user update or deletion.
 		 * So, I'd like to wait some time to collect dirty segments.
 		 */
-		if (sbi->gc_mode == GC_URGENT_HIGH) {
-			spin_lock(&sbi->gc_urgent_high_lock);
-			if (sbi->gc_urgent_high_remaining) {
-				sbi->gc_urgent_high_remaining--;
-				if (!sbi->gc_urgent_high_remaining)
-					sbi->gc_mode = GC_NORMAL;
-			}
-			spin_unlock(&sbi->gc_urgent_high_lock);
-		}
-
 		if (sbi->gc_mode == GC_URGENT_HIGH ||
 				sbi->gc_mode == GC_URGENT_MID) {
 			wait_ms = gc_th->urgent_sleep_time;
@@ -162,6 +152,15 @@ static int gc_thread_func(void *data)
 		/* balancing f2fs's metadata periodically */
 		f2fs_balance_fs_bg(sbi, true);
 next:
+		if (sbi->gc_mode == GC_URGENT_HIGH) {
+			spin_lock(&sbi->gc_urgent_high_lock);
+			if (sbi->gc_urgent_high_remaining) {
+				sbi->gc_urgent_high_remaining--;
+				if (!sbi->gc_urgent_high_remaining)
+					sbi->gc_mode = GC_NORMAL;
+			}
+			spin_unlock(&sbi->gc_urgent_high_lock);
+		}
 		sb_end_write(sbi->sb);
 
 	} while (!kthread_should_stop());
-- 
2.25.1



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[f2fs-dev] [PATCH v2 2/2] f2fs: introducr gc_urgent_idle_remaining sysfs node and mark gc_urgent_high_remaining node deprecated

[Yangtao Li via Linux-f2fs-devel]

Added a new sysfs node called gc_urgent_idle_remaining.
The user can set the trial count limit for GC urgent and
idle mode with this value. If GC thread gets to the limit,
the mode will turn back to GC normal mode finally.

This method is not only applicable to gc_urgent_high,
but applicable to all gc modes. Also mark
gc_urgent_high_remaining as deprecated, so that the node
can be removed in the future.

Signed-off-by: Yangtao Li <frank.li@vivo.com>
---
 Documentation/ABI/testing/sysfs-fs-f2fs |  8 ++++++++
 fs/f2fs/f2fs.h                          |  6 ++++--
 fs/f2fs/gc.c                            | 12 ++++++------
 fs/f2fs/super.c                         |  2 +-
 fs/f2fs/sysfs.c                         | 14 ++++++++++----
 5 files changed, 29 insertions(+), 13 deletions(-)

diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs
index 483639fb727b..859c4e53a846 100644
--- a/Documentation/ABI/testing/sysfs-fs-f2fs
+++ b/Documentation/ABI/testing/sysfs-fs-f2fs
@@ -598,6 +598,14 @@ Contact:	"Daeho Jeong" <daehojeong@google.com>
 Description:	You can set the trial count limit for GC urgent high mode with this value.
 		If GC thread gets to the limit, the mode will turn back to GC normal mode.
 		By default, the value is zero, which means there is no limit like before.
+		<deprecated>
+
+What:		/sys/fs/f2fs/<disk>/gc_urgent_idle_remaining
+Date:		October 2022
+Contact:	"Yangtao Li" <frank.li@vivo.com>
+Description:	You can set the trial count limit for GC urgent and idle mode with this value.
+		If GC thread gets to the limit, the mode will turn back to GC normal mode.
+		By default, the value is zero, which means there is no limit like before.
 
 What:		/sys/fs/f2fs/<disk>/max_roll_forward_node_blocks
 Date:		January 2022
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index e6355a5683b7..2bad69cf9fd9 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -1734,8 +1734,10 @@ struct f2fs_sb_info {
 	unsigned int cur_victim_sec;		/* current victim section num */
 	unsigned int gc_mode;			/* current GC state */
 	unsigned int next_victim_seg[2];	/* next segment in victim section */
-	spinlock_t gc_urgent_high_lock;
-	unsigned int gc_urgent_high_remaining;	/* remaining trial count for GC_URGENT_HIGH */
+	spinlock_t gc_urgent_idle_lock;
+	/* remaining trial count for GC_URGENT_* and GC_IDLE_* */
+	unsigned int gc_urgent_idle_remaining;
+	unsigned int gc_urgent_high_remaining;	/* deprecated */
 
 	/* for skip statistic */
 	unsigned long long skipped_gc_rwsem;		/* FG_GC only */
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index e0ff99c7e3f2..0ed5b3c5922c 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -152,14 +152,14 @@ static int gc_thread_func(void *data)
 		/* balancing f2fs's metadata periodically */
 		f2fs_balance_fs_bg(sbi, true);
 next:
-		if (sbi->gc_mode == GC_URGENT_HIGH) {
-			spin_lock(&sbi->gc_urgent_high_lock);
-			if (sbi->gc_urgent_high_remaining) {
-				sbi->gc_urgent_high_remaining--;
-				if (!sbi->gc_urgent_high_remaining)
+		if (sbi->gc_mode != GC_NORMAL) {
+			spin_lock(&sbi->gc_urgent_idle_lock);
+			if (sbi->gc_urgent_idle_remaining) {
+				sbi->gc_urgent_idle_remaining--;
+				if (!sbi->gc_urgent_idle_remaining)
 					sbi->gc_mode = GC_NORMAL;
 			}
-			spin_unlock(&sbi->gc_urgent_high_lock);
+			spin_unlock(&sbi->gc_urgent_idle_lock);
 		}
 		sb_end_write(sbi->sb);
 
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 3834ead04620..f90a8c0a53ec 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -3616,7 +3616,7 @@ static void init_sb_info(struct f2fs_sb_info *sbi)
 	sbi->seq_file_ra_mul = MIN_RA_MUL;
 	sbi->max_fragment_chunk = DEF_FRAGMENT_SIZE;
 	sbi->max_fragment_hole = DEF_FRAGMENT_SIZE;
-	spin_lock_init(&sbi->gc_urgent_high_lock);
+	spin_lock_init(&sbi->gc_urgent_idle_lock);
 	atomic64_set(&sbi->current_atomic_write, 0);
 
 	sbi->dir_level = DEF_DIR_LEVEL;
diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c
index df27afd71ef4..2b1c653b37cf 100644
--- a/fs/f2fs/sysfs.c
+++ b/fs/f2fs/sysfs.c
@@ -531,10 +531,14 @@ static ssize_t __sbi_store(struct f2fs_attr *a,
 		return count;
 	}
 
-	if (!strcmp(a->attr.name, "gc_urgent_high_remaining")) {
-		spin_lock(&sbi->gc_urgent_high_lock);
-		sbi->gc_urgent_high_remaining = t;
-		spin_unlock(&sbi->gc_urgent_high_lock);
+	/* deprecated */
+	if (!strcmp(a->attr.name, "gc_urgent_high_remaining"))
+		return -EINVAL;
+
+	if (!strcmp(a->attr.name, "gc_urgent_idle_remaining")) {
+		spin_lock(&sbi->gc_urgent_idle_lock);
+		sbi->gc_urgent_idle_remaining = t;
+		spin_unlock(&sbi->gc_urgent_idle_lock);
 
 		return count;
 	}
@@ -826,6 +830,7 @@ F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type);
 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, data_io_flag, data_io_flag);
 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, node_io_flag, node_io_flag);
 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_urgent_high_remaining, gc_urgent_high_remaining);
+F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_urgent_idle_remaining, gc_urgent_idle_remaining);
 F2FS_RW_ATTR(CPRC_INFO, ckpt_req_control, ckpt_thread_ioprio, ckpt_thread_ioprio);
 F2FS_GENERAL_RO_ATTR(dirty_segments);
 F2FS_GENERAL_RO_ATTR(free_segments);
@@ -953,6 +958,7 @@ static struct attribute *f2fs_attrs[] = {
 	ATTR_LIST(data_io_flag),
 	ATTR_LIST(node_io_flag),
 	ATTR_LIST(gc_urgent_high_remaining),
+	ATTR_LIST(gc_urgent_idle_remaining),
 	ATTR_LIST(ckpt_thread_ioprio),
 	ATTR_LIST(dirty_segments),
 	ATTR_LIST(free_segments),
-- 
2.25.1



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Re: [f2fs-dev] [PATCH v2 2/2] f2fs: introducr gc_urgent_idle_remaining sysfs node and mark gc_urgent_high_remaining node deprecated

[Chao Yu]

On 2022/10/25 14:50, Yangtao Li wrote:
> Added a new sysfs node called gc_urgent_idle_remaining.
> The user can set the trial count limit for GC urgent and
> idle mode with this value. If GC thread gets to the limit,
> the mode will turn back to GC normal mode finally.
> 
> This method is not only applicable to gc_urgent_high,
> but applicable to all gc modes. Also mark
> gc_urgent_high_remaining as deprecated, so that the node
> can be removed in the future.
> 
> Signed-off-by: Yangtao Li <frank.li@vivo.com>
> ---
>   Documentation/ABI/testing/sysfs-fs-f2fs |  8 ++++++++
>   fs/f2fs/f2fs.h                          |  6 ++++--
>   fs/f2fs/gc.c                            | 12 ++++++------
>   fs/f2fs/super.c                         |  2 +-
>   fs/f2fs/sysfs.c                         | 14 ++++++++++----
>   5 files changed, 29 insertions(+), 13 deletions(-)
> 
> diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs
> index 483639fb727b..859c4e53a846 100644
> --- a/Documentation/ABI/testing/sysfs-fs-f2fs
> +++ b/Documentation/ABI/testing/sysfs-fs-f2fs
> @@ -598,6 +598,14 @@ Contact:	"Daeho Jeong" <daehojeong@google.com>
>   Description:	You can set the trial count limit for GC urgent high mode with this value.
>   		If GC thread gets to the limit, the mode will turn back to GC normal mode.
>   		By default, the value is zero, which means there is no limit like before.
> +		<deprecated>
> +
> +What:		/sys/fs/f2fs/<disk>/gc_urgent_idle_remaining
> +Date:		October 2022
> +Contact:	"Yangtao Li" <frank.li@vivo.com>
> +Description:	You can set the trial count limit for GC urgent and idle mode with this value.
> +		If GC thread gets to the limit, the mode will turn back to GC normal mode.
> +		By default, the value is zero, which means there is no limit like before.
>   
>   What:		/sys/fs/f2fs/<disk>/max_roll_forward_node_blocks
>   Date:		January 2022
> diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
> index e6355a5683b7..2bad69cf9fd9 100644
> --- a/fs/f2fs/f2fs.h
> +++ b/fs/f2fs/f2fs.h
> @@ -1734,8 +1734,10 @@ struct f2fs_sb_info {
>   	unsigned int cur_victim_sec;		/* current victim section num */
>   	unsigned int gc_mode;			/* current GC state */
>   	unsigned int next_victim_seg[2];	/* next segment in victim section */
> -	spinlock_t gc_urgent_high_lock;
> -	unsigned int gc_urgent_high_remaining;	/* remaining trial count for GC_URGENT_HIGH */
> +	spinlock_t gc_urgent_idle_lock;
> +	/* remaining trial count for GC_URGENT_* and GC_IDLE_* */
> +	unsigned int gc_urgent_idle_remaining;
> +	unsigned int gc_urgent_high_remaining;	/* deprecated */
>   
>   	/* for skip statistic */
>   	unsigned long long skipped_gc_rwsem;		/* FG_GC only */
> diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
> index e0ff99c7e3f2..0ed5b3c5922c 100644
> --- a/fs/f2fs/gc.c
> +++ b/fs/f2fs/gc.c
> @@ -152,14 +152,14 @@ static int gc_thread_func(void *data)
>   		/* balancing f2fs's metadata periodically */
>   		f2fs_balance_fs_bg(sbi, true);
>   next:
> -		if (sbi->gc_mode == GC_URGENT_HIGH) {
> -			spin_lock(&sbi->gc_urgent_high_lock);
> -			if (sbi->gc_urgent_high_remaining) {
> -				sbi->gc_urgent_high_remaining--;
> -				if (!sbi->gc_urgent_high_remaining)
> +		if (sbi->gc_mode != GC_NORMAL) {
> +			spin_lock(&sbi->gc_urgent_idle_lock);
> +			if (sbi->gc_urgent_idle_remaining) {
> +				sbi->gc_urgent_idle_remaining--;
> +				if (!sbi->gc_urgent_idle_remaining)
>   					sbi->gc_mode = GC_NORMAL;
>   			}
> -			spin_unlock(&sbi->gc_urgent_high_lock);
> +			spin_unlock(&sbi->gc_urgent_idle_lock);
>   		}
>   		sb_end_write(sbi->sb);
>   
> diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
> index 3834ead04620..f90a8c0a53ec 100644
> --- a/fs/f2fs/super.c
> +++ b/fs/f2fs/super.c
> @@ -3616,7 +3616,7 @@ static void init_sb_info(struct f2fs_sb_info *sbi)
>   	sbi->seq_file_ra_mul = MIN_RA_MUL;
>   	sbi->max_fragment_chunk = DEF_FRAGMENT_SIZE;
>   	sbi->max_fragment_hole = DEF_FRAGMENT_SIZE;
> -	spin_lock_init(&sbi->gc_urgent_high_lock);
> +	spin_lock_init(&sbi->gc_urgent_idle_lock);
>   	atomic64_set(&sbi->current_atomic_write, 0);
>   
>   	sbi->dir_level = DEF_DIR_LEVEL;
> diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c
> index df27afd71ef4..2b1c653b37cf 100644
> --- a/fs/f2fs/sysfs.c
> +++ b/fs/f2fs/sysfs.c
> @@ -531,10 +531,14 @@ static ssize_t __sbi_store(struct f2fs_attr *a,
>   		return count;
>   	}
>   
> -	if (!strcmp(a->attr.name, "gc_urgent_high_remaining")) {
> -		spin_lock(&sbi->gc_urgent_high_lock);
> -		sbi->gc_urgent_high_remaining = t;
> -		spin_unlock(&sbi->gc_urgent_high_lock);
> +	/* deprecated */
> +	if (!strcmp(a->attr.name, "gc_urgent_high_remaining"))
> +		return -EINVAL;

How about those users who has already used these interface... it breaks
the usage.

It needs to keep old interface and tag as deprecated, and recommend user
to use new interface you introduced.

e.g.:

What:           /sys/fs/f2fs/<disk>/features
Date:           July 2017
Contact:        "Jaegeuk Kim" <jaegeuk@kernel.org>
Description:    <deprecated: should use /sys/fs/f2fs/<disk>/feature_list/
                 Shows all enabled features in current device.
                 Supported features:
                 encryption, blkzoned, extra_attr, projquota, inode_checksum,
                 flexible_inline_xattr, quota_ino, inode_crtime, lost_found,
                 verity, sb_checksum, casefold, readonly, compression, pin_file.

Thanks,

> +
> +	if (!strcmp(a->attr.name, "gc_urgent_idle_remaining")) {
> +		spin_lock(&sbi->gc_urgent_idle_lock);
> +		sbi->gc_urgent_idle_remaining = t;
> +		spin_unlock(&sbi->gc_urgent_idle_lock);
>   
>   		return count;
>   	}
> @@ -826,6 +830,7 @@ F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type);
>   F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, data_io_flag, data_io_flag);
>   F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, node_io_flag, node_io_flag);
>   F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_urgent_high_remaining, gc_urgent_high_remaining);
> +F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_urgent_idle_remaining, gc_urgent_idle_remaining);
>   F2FS_RW_ATTR(CPRC_INFO, ckpt_req_control, ckpt_thread_ioprio, ckpt_thread_ioprio);
>   F2FS_GENERAL_RO_ATTR(dirty_segments);
>   F2FS_GENERAL_RO_ATTR(free_segments);
> @@ -953,6 +958,7 @@ static struct attribute *f2fs_attrs[] = {
>   	ATTR_LIST(data_io_flag),
>   	ATTR_LIST(node_io_flag),
>   	ATTR_LIST(gc_urgent_high_remaining),
> +	ATTR_LIST(gc_urgent_idle_remaining),
>   	ATTR_LIST(ckpt_thread_ioprio),
>   	ATTR_LIST(dirty_segments),
>   	ATTR_LIST(free_segments),


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Re: [f2fs-dev] [PATCH v2 2/2] f2fs: introducr gc_urgent_idle_remaining sysfs node and mark gc_urgent_high_remaining node deprecated

[Jaegeuk Kim]

On 10/28, Chao Yu wrote:
> On 2022/10/25 14:50, Yangtao Li wrote:
> > Added a new sysfs node called gc_urgent_idle_remaining.
> > The user can set the trial count limit for GC urgent and
> > idle mode with this value. If GC thread gets to the limit,
> > the mode will turn back to GC normal mode finally.
> > 
> > This method is not only applicable to gc_urgent_high,
> > but applicable to all gc modes. Also mark
> > gc_urgent_high_remaining as deprecated, so that the node
> > can be removed in the future.
> > 
> > Signed-off-by: Yangtao Li <frank.li@vivo.com>
> > ---
> >   Documentation/ABI/testing/sysfs-fs-f2fs |  8 ++++++++
> >   fs/f2fs/f2fs.h                          |  6 ++++--
> >   fs/f2fs/gc.c                            | 12 ++++++------
> >   fs/f2fs/super.c                         |  2 +-
> >   fs/f2fs/sysfs.c                         | 14 ++++++++++----
> >   5 files changed, 29 insertions(+), 13 deletions(-)
> > 
> > diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs
> > index 483639fb727b..859c4e53a846 100644
> > --- a/Documentation/ABI/testing/sysfs-fs-f2fs
> > +++ b/Documentation/ABI/testing/sysfs-fs-f2fs
> > @@ -598,6 +598,14 @@ Contact:	"Daeho Jeong" <daehojeong@google.com>
> >   Description:	You can set the trial count limit for GC urgent high mode with this value.
> >   		If GC thread gets to the limit, the mode will turn back to GC normal mode.
> >   		By default, the value is zero, which means there is no limit like before.
> > +		<deprecated>
> > +
> > +What:		/sys/fs/f2fs/<disk>/gc_urgent_idle_remaining
> > +Date:		October 2022
> > +Contact:	"Yangtao Li" <frank.li@vivo.com>
> > +Description:	You can set the trial count limit for GC urgent and idle mode with this value.
> > +		If GC thread gets to the limit, the mode will turn back to GC normal mode.
> > +		By default, the value is zero, which means there is no limit like before.
> >   What:		/sys/fs/f2fs/<disk>/max_roll_forward_node_blocks
> >   Date:		January 2022
> > diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
> > index e6355a5683b7..2bad69cf9fd9 100644
> > --- a/fs/f2fs/f2fs.h
> > +++ b/fs/f2fs/f2fs.h
> > @@ -1734,8 +1734,10 @@ struct f2fs_sb_info {
> >   	unsigned int cur_victim_sec;		/* current victim section num */
> >   	unsigned int gc_mode;			/* current GC state */
> >   	unsigned int next_victim_seg[2];	/* next segment in victim section */
> > -	spinlock_t gc_urgent_high_lock;
> > -	unsigned int gc_urgent_high_remaining;	/* remaining trial count for GC_URGENT_HIGH */
> > +	spinlock_t gc_urgent_idle_lock;
> > +	/* remaining trial count for GC_URGENT_* and GC_IDLE_* */
> > +	unsigned int gc_urgent_idle_remaining;
> > +	unsigned int gc_urgent_high_remaining;	/* deprecated */
> >   	/* for skip statistic */
> >   	unsigned long long skipped_gc_rwsem;		/* FG_GC only */
> > diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
> > index e0ff99c7e3f2..0ed5b3c5922c 100644
> > --- a/fs/f2fs/gc.c
> > +++ b/fs/f2fs/gc.c
> > @@ -152,14 +152,14 @@ static int gc_thread_func(void *data)
> >   		/* balancing f2fs's metadata periodically */
> >   		f2fs_balance_fs_bg(sbi, true);
> >   next:
> > -		if (sbi->gc_mode == GC_URGENT_HIGH) {
> > -			spin_lock(&sbi->gc_urgent_high_lock);
> > -			if (sbi->gc_urgent_high_remaining) {
> > -				sbi->gc_urgent_high_remaining--;
> > -				if (!sbi->gc_urgent_high_remaining)
> > +		if (sbi->gc_mode != GC_NORMAL) {
> > +			spin_lock(&sbi->gc_urgent_idle_lock);
> > +			if (sbi->gc_urgent_idle_remaining) {
> > +				sbi->gc_urgent_idle_remaining--;
> > +				if (!sbi->gc_urgent_idle_remaining)
> >   					sbi->gc_mode = GC_NORMAL;
> >   			}
> > -			spin_unlock(&sbi->gc_urgent_high_lock);
> > +			spin_unlock(&sbi->gc_urgent_idle_lock);
> >   		}
> >   		sb_end_write(sbi->sb);
> > diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
> > index 3834ead04620..f90a8c0a53ec 100644
> > --- a/fs/f2fs/super.c
> > +++ b/fs/f2fs/super.c
> > @@ -3616,7 +3616,7 @@ static void init_sb_info(struct f2fs_sb_info *sbi)
> >   	sbi->seq_file_ra_mul = MIN_RA_MUL;
> >   	sbi->max_fragment_chunk = DEF_FRAGMENT_SIZE;
> >   	sbi->max_fragment_hole = DEF_FRAGMENT_SIZE;
> > -	spin_lock_init(&sbi->gc_urgent_high_lock);
> > +	spin_lock_init(&sbi->gc_urgent_idle_lock);
> >   	atomic64_set(&sbi->current_atomic_write, 0);
> >   	sbi->dir_level = DEF_DIR_LEVEL;
> > diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c
> > index df27afd71ef4..2b1c653b37cf 100644
> > --- a/fs/f2fs/sysfs.c
> > +++ b/fs/f2fs/sysfs.c
> > @@ -531,10 +531,14 @@ static ssize_t __sbi_store(struct f2fs_attr *a,
> >   		return count;
> >   	}
> > -	if (!strcmp(a->attr.name, "gc_urgent_high_remaining")) {
> > -		spin_lock(&sbi->gc_urgent_high_lock);
> > -		sbi->gc_urgent_high_remaining = t;
> > -		spin_unlock(&sbi->gc_urgent_high_lock);
> > +	/* deprecated */
> > +	if (!strcmp(a->attr.name, "gc_urgent_high_remaining"))
> > +		return -EINVAL;
> 
> How about those users who has already used these interface... it breaks
> the usage.
> 
> It needs to keep old interface and tag as deprecated, and recommend user
> to use new interface you introduced.

I feel that this is not a super critical node, so how about just removing it?

> 
> e.g.:
> 
> What:           /sys/fs/f2fs/<disk>/features
> Date:           July 2017
> Contact:        "Jaegeuk Kim" <jaegeuk@kernel.org>
> Description:    <deprecated: should use /sys/fs/f2fs/<disk>/feature_list/
>                 Shows all enabled features in current device.
>                 Supported features:
>                 encryption, blkzoned, extra_attr, projquota, inode_checksum,
>                 flexible_inline_xattr, quota_ino, inode_crtime, lost_found,
>                 verity, sb_checksum, casefold, readonly, compression, pin_file.
> 
> Thanks,
> 
> > +
> > +	if (!strcmp(a->attr.name, "gc_urgent_idle_remaining")) {
> > +		spin_lock(&sbi->gc_urgent_idle_lock);
> > +		sbi->gc_urgent_idle_remaining = t;
> > +		spin_unlock(&sbi->gc_urgent_idle_lock);
> >   		return count;
> >   	}
> > @@ -826,6 +830,7 @@ F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type);
> >   F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, data_io_flag, data_io_flag);
> >   F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, node_io_flag, node_io_flag);
> >   F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_urgent_high_remaining, gc_urgent_high_remaining);
> > +F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_urgent_idle_remaining, gc_urgent_idle_remaining);
> >   F2FS_RW_ATTR(CPRC_INFO, ckpt_req_control, ckpt_thread_ioprio, ckpt_thread_ioprio);
> >   F2FS_GENERAL_RO_ATTR(dirty_segments);
> >   F2FS_GENERAL_RO_ATTR(free_segments);
> > @@ -953,6 +958,7 @@ static struct attribute *f2fs_attrs[] = {
> >   	ATTR_LIST(data_io_flag),
> >   	ATTR_LIST(node_io_flag),
> >   	ATTR_LIST(gc_urgent_high_remaining),
> > +	ATTR_LIST(gc_urgent_idle_remaining),
> >   	ATTR_LIST(ckpt_thread_ioprio),
> >   	ATTR_LIST(dirty_segments),
> >   	ATTR_LIST(free_segments),


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Re: [f2fs-dev] [PATCH v2 2/2] f2fs: introducr gc_urgent_idle_remaining sysfs node and mark gc_urgent_high_remaining node deprecated

[Chao Yu]

On 2022/10/28 11:22, Jaegeuk Kim wrote:
> On 10/28, Chao Yu wrote:
>> On 2022/10/25 14:50, Yangtao Li wrote:
>>> Added a new sysfs node called gc_urgent_idle_remaining.
>>> The user can set the trial count limit for GC urgent and
>>> idle mode with this value. If GC thread gets to the limit,
>>> the mode will turn back to GC normal mode finally.
>>>
>>> This method is not only applicable to gc_urgent_high,
>>> but applicable to all gc modes. Also mark
>>> gc_urgent_high_remaining as deprecated, so that the node
>>> can be removed in the future.
>>>
>>> Signed-off-by: Yangtao Li <frank.li@vivo.com>
>>> ---
>>>    Documentation/ABI/testing/sysfs-fs-f2fs |  8 ++++++++
>>>    fs/f2fs/f2fs.h                          |  6 ++++--
>>>    fs/f2fs/gc.c                            | 12 ++++++------
>>>    fs/f2fs/super.c                         |  2 +-
>>>    fs/f2fs/sysfs.c                         | 14 ++++++++++----
>>>    5 files changed, 29 insertions(+), 13 deletions(-)
>>>
>>> diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs
>>> index 483639fb727b..859c4e53a846 100644
>>> --- a/Documentation/ABI/testing/sysfs-fs-f2fs
>>> +++ b/Documentation/ABI/testing/sysfs-fs-f2fs
>>> @@ -598,6 +598,14 @@ Contact:	"Daeho Jeong" <daehojeong@google.com>
>>>    Description:	You can set the trial count limit for GC urgent high mode with this value.
>>>    		If GC thread gets to the limit, the mode will turn back to GC normal mode.
>>>    		By default, the value is zero, which means there is no limit like before.
>>> +		<deprecated>
>>> +
>>> +What:		/sys/fs/f2fs/<disk>/gc_urgent_idle_remaining
>>> +Date:		October 2022
>>> +Contact:	"Yangtao Li" <frank.li@vivo.com>
>>> +Description:	You can set the trial count limit for GC urgent and idle mode with this value.
>>> +		If GC thread gets to the limit, the mode will turn back to GC normal mode.
>>> +		By default, the value is zero, which means there is no limit like before.
>>>    What:		/sys/fs/f2fs/<disk>/max_roll_forward_node_blocks
>>>    Date:		January 2022
>>> diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
>>> index e6355a5683b7..2bad69cf9fd9 100644
>>> --- a/fs/f2fs/f2fs.h
>>> +++ b/fs/f2fs/f2fs.h
>>> @@ -1734,8 +1734,10 @@ struct f2fs_sb_info {
>>>    	unsigned int cur_victim_sec;		/* current victim section num */
>>>    	unsigned int gc_mode;			/* current GC state */
>>>    	unsigned int next_victim_seg[2];	/* next segment in victim section */
>>> -	spinlock_t gc_urgent_high_lock;
>>> -	unsigned int gc_urgent_high_remaining;	/* remaining trial count for GC_URGENT_HIGH */
>>> +	spinlock_t gc_urgent_idle_lock;
>>> +	/* remaining trial count for GC_URGENT_* and GC_IDLE_* */
>>> +	unsigned int gc_urgent_idle_remaining;
>>> +	unsigned int gc_urgent_high_remaining;	/* deprecated */
>>>    	/* for skip statistic */
>>>    	unsigned long long skipped_gc_rwsem;		/* FG_GC only */
>>> diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
>>> index e0ff99c7e3f2..0ed5b3c5922c 100644
>>> --- a/fs/f2fs/gc.c
>>> +++ b/fs/f2fs/gc.c
>>> @@ -152,14 +152,14 @@ static int gc_thread_func(void *data)
>>>    		/* balancing f2fs's metadata periodically */
>>>    		f2fs_balance_fs_bg(sbi, true);
>>>    next:
>>> -		if (sbi->gc_mode == GC_URGENT_HIGH) {
>>> -			spin_lock(&sbi->gc_urgent_high_lock);
>>> -			if (sbi->gc_urgent_high_remaining) {
>>> -				sbi->gc_urgent_high_remaining--;
>>> -				if (!sbi->gc_urgent_high_remaining)
>>> +		if (sbi->gc_mode != GC_NORMAL) {
>>> +			spin_lock(&sbi->gc_urgent_idle_lock);
>>> +			if (sbi->gc_urgent_idle_remaining) {
>>> +				sbi->gc_urgent_idle_remaining--;
>>> +				if (!sbi->gc_urgent_idle_remaining)
>>>    					sbi->gc_mode = GC_NORMAL;
>>>    			}
>>> -			spin_unlock(&sbi->gc_urgent_high_lock);
>>> +			spin_unlock(&sbi->gc_urgent_idle_lock);
>>>    		}
>>>    		sb_end_write(sbi->sb);
>>> diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
>>> index 3834ead04620..f90a8c0a53ec 100644
>>> --- a/fs/f2fs/super.c
>>> +++ b/fs/f2fs/super.c
>>> @@ -3616,7 +3616,7 @@ static void init_sb_info(struct f2fs_sb_info *sbi)
>>>    	sbi->seq_file_ra_mul = MIN_RA_MUL;
>>>    	sbi->max_fragment_chunk = DEF_FRAGMENT_SIZE;
>>>    	sbi->max_fragment_hole = DEF_FRAGMENT_SIZE;
>>> -	spin_lock_init(&sbi->gc_urgent_high_lock);
>>> +	spin_lock_init(&sbi->gc_urgent_idle_lock);
>>>    	atomic64_set(&sbi->current_atomic_write, 0);
>>>    	sbi->dir_level = DEF_DIR_LEVEL;
>>> diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c
>>> index df27afd71ef4..2b1c653b37cf 100644
>>> --- a/fs/f2fs/sysfs.c
>>> +++ b/fs/f2fs/sysfs.c
>>> @@ -531,10 +531,14 @@ static ssize_t __sbi_store(struct f2fs_attr *a,
>>>    		return count;
>>>    	}
>>> -	if (!strcmp(a->attr.name, "gc_urgent_high_remaining")) {
>>> -		spin_lock(&sbi->gc_urgent_high_lock);
>>> -		sbi->gc_urgent_high_remaining = t;
>>> -		spin_unlock(&sbi->gc_urgent_high_lock);
>>> +	/* deprecated */
>>> +	if (!strcmp(a->attr.name, "gc_urgent_high_remaining"))
>>> +		return -EINVAL;
>>
>> How about those users who has already used these interface... it breaks
>> the usage.
>>
>> It needs to keep old interface and tag as deprecated, and recommend user
>> to use new interface you introduced.
> 
> I feel that this is not a super critical node, so how about just removing it?

Only Android is using this inferface, right?

Any plan to adjust related code from Android side?

Thanks,

> 
>>
>> e.g.:
>>
>> What:           /sys/fs/f2fs/<disk>/features
>> Date:           July 2017
>> Contact:        "Jaegeuk Kim" <jaegeuk@kernel.org>
>> Description:    <deprecated: should use /sys/fs/f2fs/<disk>/feature_list/
>>                  Shows all enabled features in current device.
>>                  Supported features:
>>                  encryption, blkzoned, extra_attr, projquota, inode_checksum,
>>                  flexible_inline_xattr, quota_ino, inode_crtime, lost_found,
>>                  verity, sb_checksum, casefold, readonly, compression, pin_file.
>>
>> Thanks,
>>
>>> +
>>> +	if (!strcmp(a->attr.name, "gc_urgent_idle_remaining")) {
>>> +		spin_lock(&sbi->gc_urgent_idle_lock);
>>> +		sbi->gc_urgent_idle_remaining = t;
>>> +		spin_unlock(&sbi->gc_urgent_idle_lock);
>>>    		return count;
>>>    	}
>>> @@ -826,6 +830,7 @@ F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type);
>>>    F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, data_io_flag, data_io_flag);
>>>    F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, node_io_flag, node_io_flag);
>>>    F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_urgent_high_remaining, gc_urgent_high_remaining);
>>> +F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_urgent_idle_remaining, gc_urgent_idle_remaining);
>>>    F2FS_RW_ATTR(CPRC_INFO, ckpt_req_control, ckpt_thread_ioprio, ckpt_thread_ioprio);
>>>    F2FS_GENERAL_RO_ATTR(dirty_segments);
>>>    F2FS_GENERAL_RO_ATTR(free_segments);
>>> @@ -953,6 +958,7 @@ static struct attribute *f2fs_attrs[] = {
>>>    	ATTR_LIST(data_io_flag),
>>>    	ATTR_LIST(node_io_flag),
>>>    	ATTR_LIST(gc_urgent_high_remaining),
>>> +	ATTR_LIST(gc_urgent_idle_remaining),
>>>    	ATTR_LIST(ckpt_thread_ioprio),
>>>    	ATTR_LIST(dirty_segments),
>>>    	ATTR_LIST(free_segments),


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Re: [f2fs-dev] [PATCH v2 2/2] f2fs: introducr gc_urgent_idle_remaining sysfs node and mark gc_urgent_high_remaining node deprecated

[Jaegeuk Kim]

On 10/28, Chao Yu wrote:
> On 2022/10/28 11:22, Jaegeuk Kim wrote:
> > On 10/28, Chao Yu wrote:
> > > On 2022/10/25 14:50, Yangtao Li wrote:
> > > > Added a new sysfs node called gc_urgent_idle_remaining.
> > > > The user can set the trial count limit for GC urgent and
> > > > idle mode with this value. If GC thread gets to the limit,
> > > > the mode will turn back to GC normal mode finally.
> > > > 
> > > > This method is not only applicable to gc_urgent_high,
> > > > but applicable to all gc modes. Also mark
> > > > gc_urgent_high_remaining as deprecated, so that the node
> > > > can be removed in the future.
> > > > 
> > > > Signed-off-by: Yangtao Li <frank.li@vivo.com>
> > > > ---
> > > >    Documentation/ABI/testing/sysfs-fs-f2fs |  8 ++++++++
> > > >    fs/f2fs/f2fs.h                          |  6 ++++--
> > > >    fs/f2fs/gc.c                            | 12 ++++++------
> > > >    fs/f2fs/super.c                         |  2 +-
> > > >    fs/f2fs/sysfs.c                         | 14 ++++++++++----
> > > >    5 files changed, 29 insertions(+), 13 deletions(-)
> > > > 
> > > > diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs
> > > > index 483639fb727b..859c4e53a846 100644
> > > > --- a/Documentation/ABI/testing/sysfs-fs-f2fs
> > > > +++ b/Documentation/ABI/testing/sysfs-fs-f2fs
> > > > @@ -598,6 +598,14 @@ Contact:	"Daeho Jeong" <daehojeong@google.com>
> > > >    Description:	You can set the trial count limit for GC urgent high mode with this value.
> > > >    		If GC thread gets to the limit, the mode will turn back to GC normal mode.
> > > >    		By default, the value is zero, which means there is no limit like before.
> > > > +		<deprecated>
> > > > +
> > > > +What:		/sys/fs/f2fs/<disk>/gc_urgent_idle_remaining
> > > > +Date:		October 2022
> > > > +Contact:	"Yangtao Li" <frank.li@vivo.com>
> > > > +Description:	You can set the trial count limit for GC urgent and idle mode with this value.
> > > > +		If GC thread gets to the limit, the mode will turn back to GC normal mode.
> > > > +		By default, the value is zero, which means there is no limit like before.
> > > >    What:		/sys/fs/f2fs/<disk>/max_roll_forward_node_blocks
> > > >    Date:		January 2022
> > > > diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
> > > > index e6355a5683b7..2bad69cf9fd9 100644
> > > > --- a/fs/f2fs/f2fs.h
> > > > +++ b/fs/f2fs/f2fs.h
> > > > @@ -1734,8 +1734,10 @@ struct f2fs_sb_info {
> > > >    	unsigned int cur_victim_sec;		/* current victim section num */
> > > >    	unsigned int gc_mode;			/* current GC state */
> > > >    	unsigned int next_victim_seg[2];	/* next segment in victim section */
> > > > -	spinlock_t gc_urgent_high_lock;
> > > > -	unsigned int gc_urgent_high_remaining;	/* remaining trial count for GC_URGENT_HIGH */
> > > > +	spinlock_t gc_urgent_idle_lock;
> > > > +	/* remaining trial count for GC_URGENT_* and GC_IDLE_* */
> > > > +	unsigned int gc_urgent_idle_remaining;
> > > > +	unsigned int gc_urgent_high_remaining;	/* deprecated */
> > > >    	/* for skip statistic */
> > > >    	unsigned long long skipped_gc_rwsem;		/* FG_GC only */
> > > > diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
> > > > index e0ff99c7e3f2..0ed5b3c5922c 100644
> > > > --- a/fs/f2fs/gc.c
> > > > +++ b/fs/f2fs/gc.c
> > > > @@ -152,14 +152,14 @@ static int gc_thread_func(void *data)
> > > >    		/* balancing f2fs's metadata periodically */
> > > >    		f2fs_balance_fs_bg(sbi, true);
> > > >    next:
> > > > -		if (sbi->gc_mode == GC_URGENT_HIGH) {
> > > > -			spin_lock(&sbi->gc_urgent_high_lock);
> > > > -			if (sbi->gc_urgent_high_remaining) {
> > > > -				sbi->gc_urgent_high_remaining--;
> > > > -				if (!sbi->gc_urgent_high_remaining)
> > > > +		if (sbi->gc_mode != GC_NORMAL) {
> > > > +			spin_lock(&sbi->gc_urgent_idle_lock);
> > > > +			if (sbi->gc_urgent_idle_remaining) {
> > > > +				sbi->gc_urgent_idle_remaining--;
> > > > +				if (!sbi->gc_urgent_idle_remaining)
> > > >    					sbi->gc_mode = GC_NORMAL;
> > > >    			}
> > > > -			spin_unlock(&sbi->gc_urgent_high_lock);
> > > > +			spin_unlock(&sbi->gc_urgent_idle_lock);
> > > >    		}
> > > >    		sb_end_write(sbi->sb);
> > > > diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
> > > > index 3834ead04620..f90a8c0a53ec 100644
> > > > --- a/fs/f2fs/super.c
> > > > +++ b/fs/f2fs/super.c
> > > > @@ -3616,7 +3616,7 @@ static void init_sb_info(struct f2fs_sb_info *sbi)
> > > >    	sbi->seq_file_ra_mul = MIN_RA_MUL;
> > > >    	sbi->max_fragment_chunk = DEF_FRAGMENT_SIZE;
> > > >    	sbi->max_fragment_hole = DEF_FRAGMENT_SIZE;
> > > > -	spin_lock_init(&sbi->gc_urgent_high_lock);
> > > > +	spin_lock_init(&sbi->gc_urgent_idle_lock);
> > > >    	atomic64_set(&sbi->current_atomic_write, 0);
> > > >    	sbi->dir_level = DEF_DIR_LEVEL;
> > > > diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c
> > > > index df27afd71ef4..2b1c653b37cf 100644
> > > > --- a/fs/f2fs/sysfs.c
> > > > +++ b/fs/f2fs/sysfs.c
> > > > @@ -531,10 +531,14 @@ static ssize_t __sbi_store(struct f2fs_attr *a,
> > > >    		return count;
> > > >    	}
> > > > -	if (!strcmp(a->attr.name, "gc_urgent_high_remaining")) {
> > > > -		spin_lock(&sbi->gc_urgent_high_lock);
> > > > -		sbi->gc_urgent_high_remaining = t;
> > > > -		spin_unlock(&sbi->gc_urgent_high_lock);
> > > > +	/* deprecated */
> > > > +	if (!strcmp(a->attr.name, "gc_urgent_high_remaining"))
> > > > +		return -EINVAL;
> > > 
> > > How about those users who has already used these interface... it breaks
> > > the usage.
> > > 
> > > It needs to keep old interface and tag as deprecated, and recommend user
> > > to use new interface you introduced.
> > 
> > I feel that this is not a super critical node, so how about just removing it?
> 
> Only Android is using this inferface, right?
> 
> Any plan to adjust related code from Android side?

There's no place to use this yet, but just need to modify internal tests.

> 
> Thanks,
> 
> > 
> > > 
> > > e.g.:
> > > 
> > > What:           /sys/fs/f2fs/<disk>/features
> > > Date:           July 2017
> > > Contact:        "Jaegeuk Kim" <jaegeuk@kernel.org>
> > > Description:    <deprecated: should use /sys/fs/f2fs/<disk>/feature_list/
> > >                  Shows all enabled features in current device.
> > >                  Supported features:
> > >                  encryption, blkzoned, extra_attr, projquota, inode_checksum,
> > >                  flexible_inline_xattr, quota_ino, inode_crtime, lost_found,
> > >                  verity, sb_checksum, casefold, readonly, compression, pin_file.
> > > 
> > > Thanks,
> > > 
> > > > +
> > > > +	if (!strcmp(a->attr.name, "gc_urgent_idle_remaining")) {
> > > > +		spin_lock(&sbi->gc_urgent_idle_lock);
> > > > +		sbi->gc_urgent_idle_remaining = t;
> > > > +		spin_unlock(&sbi->gc_urgent_idle_lock);
> > > >    		return count;
> > > >    	}
> > > > @@ -826,6 +830,7 @@ F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type);
> > > >    F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, data_io_flag, data_io_flag);
> > > >    F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, node_io_flag, node_io_flag);
> > > >    F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_urgent_high_remaining, gc_urgent_high_remaining);
> > > > +F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_urgent_idle_remaining, gc_urgent_idle_remaining);
> > > >    F2FS_RW_ATTR(CPRC_INFO, ckpt_req_control, ckpt_thread_ioprio, ckpt_thread_ioprio);
> > > >    F2FS_GENERAL_RO_ATTR(dirty_segments);
> > > >    F2FS_GENERAL_RO_ATTR(free_segments);
> > > > @@ -953,6 +958,7 @@ static struct attribute *f2fs_attrs[] = {
> > > >    	ATTR_LIST(data_io_flag),
> > > >    	ATTR_LIST(node_io_flag),
> > > >    	ATTR_LIST(gc_urgent_high_remaining),
> > > > +	ATTR_LIST(gc_urgent_idle_remaining),
> > > >    	ATTR_LIST(ckpt_thread_ioprio),
> > > >    	ATTR_LIST(dirty_segments),
> > > >    	ATTR_LIST(free_segments),


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Re: [f2fs-dev] [PATCH v2 1/2] f2fs: fix gc mode when gc_urgent_high_remaining is 1

[Chao Yu]

On 2022/10/25 14:50, Yangtao Li wrote:
> Under the current logic, when gc_urgent_high_remaining is set to 1,
> the mode will be switched to normal at the beginning, instead of
> running in gc_urgent mode.
> 
> Let's switch the gc mode back to normal when the gc ends.
> 
> Fixes: 265576181b4a ("f2fs: remove gc_urgent_high_limited for cleanup")
> 

Unneeded empty line here, it's trivial though...

> Signed-off-by: Yangtao Li <frank.li@vivo.com>

Reviewed-by: Chao Yu <chao@kernel.org>

Thanks,


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