[f2fs-dev] [PATCH v3 1/2] f2fs: export ipu policy in debugfs

[f2fs-dev] [PATCH v3 1/2] f2fs: export ipu policy in debugfs

[Yangtao Li via Linux-f2fs-devel]

Export ipu_policy as a string in debugfs for better readability and
it can help us better understand some strategies of the file system.

Signed-off-by: Yangtao Li <frank.li@vivo.com>
---
v3:
- remove unnecessary '\n'
 fs/f2fs/debug.c   | 24 ++++++++++++++++++++++++
 fs/f2fs/segment.h |  1 +
 2 files changed, 25 insertions(+)

diff --git a/fs/f2fs/debug.c b/fs/f2fs/debug.c
index 32af4f0c5735..ff5995cb9560 100644
--- a/fs/f2fs/debug.c
+++ b/fs/f2fs/debug.c
@@ -354,6 +354,17 @@ static char *s_flag[] = {
 	[SBI_IS_FREEZING]	= " freezefs",
 };
 
+static const char *ipu_mode_names[F2FS_IPU_MAX] = {
+	[F2FS_IPU_FORCE]	= "FORCE",
+	[F2FS_IPU_SSR]		= "SSR",
+	[F2FS_IPU_UTIL]		= "UTIL",
+	[F2FS_IPU_SSR_UTIL]	= "SSR_UTIL",
+	[F2FS_IPU_FSYNC]	= "FSYNC",
+	[F2FS_IPU_ASYNC]	= "ASYNC",
+	[F2FS_IPU_NOCACHE]	= "NOCACHE",
+	[F2FS_IPU_HONOR_OPU_WRITE]	= "HONOR_OPU_WRITE",
+};
+
 static int stat_show(struct seq_file *s, void *v)
 {
 	struct f2fs_stat_info *si;
@@ -384,6 +395,19 @@ static int stat_show(struct seq_file *s, void *v)
 		seq_printf(s, "Current Time Sec: %llu / Mounted Time Sec: %llu\n\n",
 					ktime_get_boottime_seconds(),
 					SIT_I(si->sbi)->mounted_time);
+
+		seq_puts(s, "Policy:\n");
+		seq_puts(s, "  - IPU: [");
+		if (IS_F2FS_IPU_DISABLE(si->sbi)) {
+			seq_puts(s, " DISABLE");
+		} else {
+			unsigned long policy = SM_I(si->sbi)->ipu_policy;
+
+			for_each_set_bit(j, &policy, F2FS_IPU_MAX)
+				seq_printf(s, " %s", ipu_mode_names[j]);
+		}
+		seq_puts(s, " ]\n\n");
+
 		if (test_opt(si->sbi, DISCARD))
 			seq_printf(s, "Utilization: %u%% (%u valid blocks, %u discard blocks)\n",
 				si->utilization, si->valid_count, si->discard_blks);
diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h
index 6003fbaf4b7d..7230d0c6c138 100644
--- a/fs/f2fs/segment.h
+++ b/fs/f2fs/segment.h
@@ -672,6 +672,7 @@ static inline int utilization(struct f2fs_sb_info *sbi)
 
 #define F2FS_IPU_DISABLE	0
 
+/* Modification on enum should be synchronized with ipu_mode_names array */
 enum {
 	F2FS_IPU_FORCE,
 	F2FS_IPU_SSR,
-- 
2.25.1



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[f2fs-dev] [PATCH v3 2/2] f2fs: replace si->sbi w/ sbi in stat_show()

[Yangtao Li via Linux-f2fs-devel]

For each loop add a local f2fs_sb_info pointer insted of looking it up.

Signed-off-by: Yangtao Li <frank.li@vivo.com>
---
 fs/f2fs/debug.c | 44 +++++++++++++++++++++++---------------------
 1 file changed, 23 insertions(+), 21 deletions(-)

diff --git a/fs/f2fs/debug.c b/fs/f2fs/debug.c
index ff5995cb9560..30a77936e3c5 100644
--- a/fs/f2fs/debug.c
+++ b/fs/f2fs/debug.c
@@ -373,16 +373,18 @@ static int stat_show(struct seq_file *s, void *v)
 
 	raw_spin_lock_irqsave(&f2fs_stat_lock, flags);
 	list_for_each_entry(si, &f2fs_stat_list, stat_list) {
-		update_general_status(si->sbi);
+		struct f2fs_sb_info *sbi = si->sbi;
+
+		update_general_status(sbi);
 
 		seq_printf(s, "\n=====[ partition info(%pg). #%d, %s, CP: %s]=====\n",
-			si->sbi->sb->s_bdev, i++,
-			f2fs_readonly(si->sbi->sb) ? "RO" : "RW",
-			is_set_ckpt_flags(si->sbi, CP_DISABLED_FLAG) ?
-			"Disabled" : (f2fs_cp_error(si->sbi) ? "Error" : "Good"));
-		if (si->sbi->s_flag) {
+			sbi->sb->s_bdev, i++,
+			f2fs_readonly(sbi->sb) ? "RO" : "RW",
+			is_set_ckpt_flags(sbi, CP_DISABLED_FLAG) ?
+			"Disabled" : (f2fs_cp_error(sbi) ? "Error" : "Good"));
+		if (sbi->s_flag) {
 			seq_puts(s, "[SBI:");
-			for_each_set_bit(j, &si->sbi->s_flag, 32)
+			for_each_set_bit(j, &sbi->s_flag, 32)
 				seq_puts(s, s_flag[j]);
 			seq_puts(s, "]\n");
 		}
@@ -394,21 +396,21 @@ static int stat_show(struct seq_file *s, void *v)
 			   si->overp_segs, si->rsvd_segs);
 		seq_printf(s, "Current Time Sec: %llu / Mounted Time Sec: %llu\n\n",
 					ktime_get_boottime_seconds(),
-					SIT_I(si->sbi)->mounted_time);
+					SIT_I(sbi)->mounted_time);
 
 		seq_puts(s, "Policy:\n");
 		seq_puts(s, "  - IPU: [");
-		if (IS_F2FS_IPU_DISABLE(si->sbi)) {
+		if (IS_F2FS_IPU_DISABLE(sbi)) {
 			seq_puts(s, " DISABLE");
 		} else {
-			unsigned long policy = SM_I(si->sbi)->ipu_policy;
+			unsigned long policy = SM_I(sbi)->ipu_policy;
 
 			for_each_set_bit(j, &policy, F2FS_IPU_MAX)
 				seq_printf(s, " %s", ipu_mode_names[j]);
 		}
 		seq_puts(s, " ]\n\n");
 
-		if (test_opt(si->sbi, DISCARD))
+		if (test_opt(sbi, DISCARD))
 			seq_printf(s, "Utilization: %u%% (%u valid blocks, %u discard blocks)\n",
 				si->utilization, si->valid_count, si->discard_blks);
 		else
@@ -515,15 +517,15 @@ static int stat_show(struct seq_file *s, void *v)
 		seq_printf(s, "  - node segments : %d (%d)\n",
 				si->node_segs, si->bg_node_segs);
 		seq_puts(s, "  - Reclaimed segs :\n");
-		seq_printf(s, "    - Normal : %d\n", si->sbi->gc_reclaimed_segs[GC_NORMAL]);
-		seq_printf(s, "    - Idle CB : %d\n", si->sbi->gc_reclaimed_segs[GC_IDLE_CB]);
+		seq_printf(s, "    - Normal : %d\n", sbi->gc_reclaimed_segs[GC_NORMAL]);
+		seq_printf(s, "    - Idle CB : %d\n", sbi->gc_reclaimed_segs[GC_IDLE_CB]);
 		seq_printf(s, "    - Idle Greedy : %d\n",
-				si->sbi->gc_reclaimed_segs[GC_IDLE_GREEDY]);
-		seq_printf(s, "    - Idle AT : %d\n", si->sbi->gc_reclaimed_segs[GC_IDLE_AT]);
+				sbi->gc_reclaimed_segs[GC_IDLE_GREEDY]);
+		seq_printf(s, "    - Idle AT : %d\n", sbi->gc_reclaimed_segs[GC_IDLE_AT]);
 		seq_printf(s, "    - Urgent High : %d\n",
-				si->sbi->gc_reclaimed_segs[GC_URGENT_HIGH]);
-		seq_printf(s, "    - Urgent Mid : %d\n", si->sbi->gc_reclaimed_segs[GC_URGENT_MID]);
-		seq_printf(s, "    - Urgent Low : %d\n", si->sbi->gc_reclaimed_segs[GC_URGENT_LOW]);
+				sbi->gc_reclaimed_segs[GC_URGENT_HIGH]);
+		seq_printf(s, "    - Urgent Mid : %d\n", sbi->gc_reclaimed_segs[GC_URGENT_MID]);
+		seq_printf(s, "    - Urgent Low : %d\n", sbi->gc_reclaimed_segs[GC_URGENT_LOW]);
 		seq_printf(s, "Try to move %d blocks (BG: %d)\n", si->tot_blks,
 				si->bg_data_blks + si->bg_node_blks);
 		seq_printf(s, "  - data blocks : %d (%d)\n", si->data_blks,
@@ -589,7 +591,7 @@ static int stat_show(struct seq_file *s, void *v)
 			   si->ndirty_imeta);
 		seq_printf(s, "  - fsync mark: %4lld\n",
 			   percpu_counter_sum_positive(
-					&si->sbi->rf_node_block_count));
+					&sbi->rf_node_block_count));
 		seq_printf(s, "  - NATs: %9d/%9d\n  - SITs: %9d/%9d\n",
 			   si->dirty_nats, si->nats, si->dirty_sits, si->sits);
 		seq_printf(s, "  - free_nids: %9d/%9d\n  - alloc_nids: %9d\n",
@@ -616,12 +618,12 @@ static int stat_show(struct seq_file *s, void *v)
 			   si->block_count[LFS], si->segment_count[LFS]);
 
 		/* segment usage info */
-		f2fs_update_sit_info(si->sbi);
+		f2fs_update_sit_info(sbi);
 		seq_printf(s, "\nBDF: %u, avg. vblocks: %u\n",
 			   si->bimodal, si->avg_vblocks);
 
 		/* memory footprint */
-		update_mem_info(si->sbi);
+		update_mem_info(sbi);
 		seq_printf(s, "\nMemory: %llu KB\n",
 			(si->base_mem + si->cache_mem + si->page_mem) >> 10);
 		seq_printf(s, "  - static: %llu KB\n",
-- 
2.25.1



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Re: [f2fs-dev] [PATCH v3 2/2] f2fs: replace si->sbi w/ sbi in stat_show()

[Chao Yu]

On 2023/2/13 22:18, Yangtao Li wrote:
> For each loop add a local f2fs_sb_info pointer insted of looking it up.
> 
> Signed-off-by: Yangtao Li <frank.li@vivo.com>

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

Thanks,


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Re: [f2fs-dev] [PATCH v3 1/2] f2fs: export ipu policy in debugfs

[Chao Yu]

On 2023/2/13 22:18, Yangtao Li wrote:
> Export ipu_policy as a string in debugfs for better readability and
> it can help us better understand some strategies of the file system.
> 
> Signed-off-by: Yangtao Li <frank.li@vivo.com>

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

Thanks,


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Re: [f2fs-dev] [PATCH v3 1/2] f2fs: export ipu policy in debugfs

[patchwork-bot+f2fs]

Hello:

This series was applied to jaegeuk/f2fs.git (dev)
by Jaegeuk Kim <jaegeuk@kernel.org>:

On Mon, 13 Feb 2023 22:18:24 +0800 you wrote:
> Export ipu_policy as a string in debugfs for better readability and
> it can help us better understand some strategies of the file system.
> 
> Signed-off-by: Yangtao Li <frank.li@vivo.com>
> ---
> v3:
> - remove unnecessary '\n'
>  fs/f2fs/debug.c   | 24 ++++++++++++++++++++++++
>  fs/f2fs/segment.h |  1 +
>  2 files changed, 25 insertions(+)

Here is the summary with links:
  - [f2fs-dev,v3,1/2] f2fs: export ipu policy in debugfs
    https://git.kernel.org/jaegeuk/f2fs/c/f2e357893cb7
  - [f2fs-dev,v3,2/2] f2fs: replace si->sbi w/ sbi in stat_show()
    https://git.kernel.org/jaegeuk/f2fs/c/dda7d77bcd42

You are awesome, thank you!
-- 
Deet-doot-dot, I am a bot.
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