This is a note to let you know that I've just added the patch titled
f2fs: fix to account cp stats correctly
to the 6.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
f2fs-fix-to-account-cp-stats-correctly.patch
and it can be found in the queue-6.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit e75d1ea8ed4e71636de6f76845324d2865f829d0
Author: Chao Yu <chao@xxxxxxxxxx>
Date: Tue Aug 8 08:59:49 2023 +0800
f2fs: fix to account cp stats correctly
[ Upstream commit eb61c2cca2eb2110cc7b61a7bc15b3850977a778 ]
cp_foreground_calls sysfs entry shows total CP call count rather than
foreground CP call count, fix it.
Fixes: fc7100ea2a52 ("f2fs: Add f2fs stats to sysfs")
Signed-off-by: Chao Yu <chao@xxxxxxxxxx>
Signed-off-by: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index 8fd3b7f9fb88e..b0597a539fc54 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -1701,9 +1701,9 @@ int f2fs_write_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
}
f2fs_restore_inmem_curseg(sbi);
+ stat_inc_cp_count(sbi);
stop:
unblock_operations(sbi);
- stat_inc_cp_count(sbi->stat_info);
if (cpc->reason & CP_RECOVERY)
f2fs_notice(sbi, "checkpoint: version = %llx", ckpt_ver);
diff --git a/fs/f2fs/debug.c b/fs/f2fs/debug.c
index c7cf453dce838..fdbf994f12718 100644
--- a/fs/f2fs/debug.c
+++ b/fs/f2fs/debug.c
@@ -215,6 +215,9 @@ static void update_general_status(struct f2fs_sb_info *sbi)
si->valid_blks[type] += blks;
}
+ for (i = 0; i < MAX_CALL_TYPE; i++)
+ si->cp_call_count[i] = atomic_read(&sbi->cp_call_count[i]);
+
for (i = 0; i < 2; i++) {
si->segment_count[i] = sbi->segment_count[i];
si->block_count[i] = sbi->block_count[i];
@@ -497,7 +500,9 @@ static int stat_show(struct seq_file *s, void *v)
seq_printf(s, " - Prefree: %d\n - Free: %d (%d)\n\n",
si->prefree_count, si->free_segs, si->free_secs);
seq_printf(s, "CP calls: %d (BG: %d)\n",
- si->cp_count, si->bg_cp_count);
+ si->cp_call_count[TOTAL_CALL],
+ si->cp_call_count[BACKGROUND]);
+ seq_printf(s, "CP count: %d\n", si->cp_count);
seq_printf(s, " - cp blocks : %u\n", si->meta_count[META_CP]);
seq_printf(s, " - sit blocks : %u\n",
si->meta_count[META_SIT]);
@@ -699,6 +704,8 @@ int f2fs_build_stats(struct f2fs_sb_info *sbi)
atomic_set(&sbi->inplace_count, 0);
for (i = META_CP; i < META_MAX; i++)
atomic_set(&sbi->meta_count[i], 0);
+ for (i = 0; i < MAX_CALL_TYPE; i++)
+ atomic_set(&sbi->cp_call_count[i], 0);
atomic_set(&sbi->max_aw_cnt, 0);
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 278a401e32cf3..cfb8e274c0699 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -1377,6 +1377,13 @@ enum errors_option {
MOUNT_ERRORS_PANIC, /* panic on errors */
};
+enum {
+ BACKGROUND,
+ FOREGROUND,
+ MAX_CALL_TYPE,
+ TOTAL_CALL = FOREGROUND,
+};
+
static inline int f2fs_test_bit(unsigned int nr, char *addr);
static inline void f2fs_set_bit(unsigned int nr, char *addr);
static inline void f2fs_clear_bit(unsigned int nr, char *addr);
@@ -1687,6 +1694,7 @@ struct f2fs_sb_info {
unsigned int io_skip_bggc; /* skip background gc for in-flight IO */
unsigned int other_skip_bggc; /* skip background gc for other reasons */
unsigned int ndirty_inode[NR_INODE_TYPE]; /* # of dirty inodes */
+ atomic_t cp_call_count[MAX_CALL_TYPE]; /* # of cp call */
#endif
spinlock_t stat_lock; /* lock for stat operations */
@@ -3848,12 +3856,6 @@ void f2fs_destroy_recovery_cache(void);
/*
* debug.c
*/
-enum {
- BACKGROUND,
- FOREGROUND,
- MAX_CALL_TYPE
-};
-
#ifdef CONFIG_F2FS_STAT_FS
struct f2fs_stat_info {
struct list_head stat_list;
@@ -3900,7 +3902,7 @@ struct f2fs_stat_info {
int dirty_count, node_pages, meta_pages, compress_pages;
int compress_page_hit;
int prefree_count, free_segs, free_secs;
- int cp_count, bg_cp_count;
+ int cp_call_count[MAX_CALL_TYPE], cp_count;
int gc_call_count[MAX_CALL_TYPE];
int gc_segs[2][2];
int gc_secs[2][2];
@@ -3925,8 +3927,9 @@ static inline struct f2fs_stat_info *F2FS_STAT(struct f2fs_sb_info *sbi)
return (struct f2fs_stat_info *)sbi->stat_info;
}
-#define stat_inc_cp_count(si) ((si)->cp_count++)
-#define stat_inc_bg_cp_count(si) ((si)->bg_cp_count++)
+#define stat_inc_cp_call_count(sbi, foreground) \
+ atomic_inc(&sbi->cp_call_count[(foreground)])
+#define stat_inc_cp_count(si) (F2FS_STAT(sbi)->cp_count++)
#define stat_io_skip_bggc_count(sbi) ((sbi)->io_skip_bggc++)
#define stat_other_skip_bggc_count(sbi) ((sbi)->other_skip_bggc++)
#define stat_inc_dirty_inode(sbi, type) ((sbi)->ndirty_inode[type]++)
@@ -4043,8 +4046,8 @@ void __init f2fs_create_root_stats(void);
void f2fs_destroy_root_stats(void);
void f2fs_update_sit_info(struct f2fs_sb_info *sbi);
#else
-#define stat_inc_cp_count(si) do { } while (0)
-#define stat_inc_bg_cp_count(si) do { } while (0)
+#define stat_inc_cp_call_count(sbi, foreground) do { } while (0)
+#define stat_inc_cp_count(sbi) do { } while (0)
#define stat_io_skip_bggc_count(sbi) do { } while (0)
#define stat_other_skip_bggc_count(sbi) do { } while (0)
#define stat_inc_dirty_inode(sbi, type) do { } while (0)
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index 2addd7c95c7eb..7d2736b66c702 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -1840,6 +1840,7 @@ int f2fs_gc(struct f2fs_sb_info *sbi, struct f2fs_gc_control *gc_control)
* secure free segments which doesn't need fggc any more.
*/
if (prefree_segments(sbi)) {
+ stat_inc_cp_call_count(sbi, TOTAL_CALL);
ret = f2fs_write_checkpoint(sbi, &cpc);
if (ret)
goto stop;
@@ -1884,6 +1885,7 @@ int f2fs_gc(struct f2fs_sb_info *sbi, struct f2fs_gc_control *gc_control)
round++;
if (skipped_round > MAX_SKIP_GC_COUNT &&
skipped_round * 2 >= round) {
+ stat_inc_cp_call_count(sbi, TOTAL_CALL);
ret = f2fs_write_checkpoint(sbi, &cpc);
goto stop;
}
@@ -1899,6 +1901,7 @@ int f2fs_gc(struct f2fs_sb_info *sbi, struct f2fs_gc_control *gc_control)
*/
if (free_sections(sbi) <= upper_secs + NR_GC_CHECKPOINT_SECS &&
prefree_segments(sbi)) {
+ stat_inc_cp_call_count(sbi, TOTAL_CALL);
ret = f2fs_write_checkpoint(sbi, &cpc);
if (ret)
goto stop;
@@ -2024,6 +2027,7 @@ static int free_segment_range(struct f2fs_sb_info *sbi,
if (gc_only)
goto out;
+ stat_inc_cp_call_count(sbi, TOTAL_CALL);
err = f2fs_write_checkpoint(sbi, &cpc);
if (err)
goto out;
@@ -2216,6 +2220,7 @@ int f2fs_resize_fs(struct file *filp, __u64 block_count)
clear_sbi_flag(sbi, SBI_IS_RESIZEFS);
set_sbi_flag(sbi, SBI_IS_DIRTY);
+ stat_inc_cp_call_count(sbi, TOTAL_CALL);
err = f2fs_write_checkpoint(sbi, &cpc);
if (err) {
update_fs_metadata(sbi, secs);
diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
index 58c1a0096f7de..5b632d2641d49 100644
--- a/fs/f2fs/recovery.c
+++ b/fs/f2fs/recovery.c
@@ -895,6 +895,7 @@ int f2fs_recover_fsync_data(struct f2fs_sb_info *sbi, bool check_only)
struct cp_control cpc = {
.reason = CP_RECOVERY,
};
+ stat_inc_cp_call_count(sbi, TOTAL_CALL);
err = f2fs_write_checkpoint(sbi, &cpc);
}
}
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index aa126597b8be5..37196d7a9685c 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -511,8 +511,8 @@ void f2fs_balance_fs_bg(struct f2fs_sb_info *sbi, bool from_bg)
mutex_unlock(&sbi->flush_lock);
}
+ stat_inc_cp_call_count(sbi, BACKGROUND);
f2fs_sync_fs(sbi->sb, 1);
- stat_inc_bg_cp_count(sbi->stat_info);
}
static int __submit_flush_wait(struct f2fs_sb_info *sbi,
@@ -3151,6 +3151,7 @@ int f2fs_trim_fs(struct f2fs_sb_info *sbi, struct fstrim_range *range)
goto out;
f2fs_down_write(&sbi->gc_lock);
+ stat_inc_cp_call_count(sbi, TOTAL_CALL);
err = f2fs_write_checkpoint(sbi, &cpc);
f2fs_up_write(&sbi->gc_lock);
if (err)
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 20f1bda0e1a17..a6f283d34cd49 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -1598,6 +1598,7 @@ static void f2fs_put_super(struct super_block *sb)
struct cp_control cpc = {
.reason = CP_UMOUNT,
};
+ stat_inc_cp_call_count(sbi, TOTAL_CALL);
err = f2fs_write_checkpoint(sbi, &cpc);
}
@@ -1607,6 +1608,7 @@ static void f2fs_put_super(struct super_block *sb)
struct cp_control cpc = {
.reason = CP_UMOUNT | CP_TRIMMED,
};
+ stat_inc_cp_call_count(sbi, TOTAL_CALL);
err = f2fs_write_checkpoint(sbi, &cpc);
}
@@ -1703,8 +1705,10 @@ int f2fs_sync_fs(struct super_block *sb, int sync)
if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
return -EAGAIN;
- if (sync)
+ if (sync) {
+ stat_inc_cp_call_count(sbi, TOTAL_CALL);
err = f2fs_issue_checkpoint(sbi);
+ }
return err;
}
@@ -2229,6 +2233,7 @@ static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
f2fs_down_write(&sbi->gc_lock);
cpc.reason = CP_PAUSE;
set_sbi_flag(sbi, SBI_CP_DISABLED);
+ stat_inc_cp_call_count(sbi, TOTAL_CALL);
err = f2fs_write_checkpoint(sbi, &cpc);
if (err)
goto out_unlock;
@@ -4848,6 +4853,7 @@ static void kill_f2fs_super(struct super_block *sb)
struct cp_control cpc = {
.reason = CP_UMOUNT,
};
+ stat_inc_cp_call_count(sbi, TOTAL_CALL);
f2fs_write_checkpoint(sbi, &cpc);
}
diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c
index 52a0b7878e718..8e18c2d742ca9 100644
--- a/fs/f2fs/sysfs.c
+++ b/fs/f2fs/sysfs.c
@@ -356,6 +356,16 @@ static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
if (!strcmp(a->attr.name, "revoked_atomic_block"))
return sysfs_emit(buf, "%llu\n", sbi->revoked_atomic_block);
+#ifdef CONFIG_F2FS_STAT_FS
+ if (!strcmp(a->attr.name, "cp_foreground_calls"))
+ return sysfs_emit(buf, "%d\n",
+ atomic_read(&sbi->cp_call_count[TOTAL_CALL]) -
+ atomic_read(&sbi->cp_call_count[BACKGROUND]));
+ if (!strcmp(a->attr.name, "cp_background_calls"))
+ return sysfs_emit(buf, "%d\n",
+ atomic_read(&sbi->cp_call_count[BACKGROUND]));
+#endif
+
ui = (unsigned int *)(ptr + a->offset);
return sysfs_emit(buf, "%u\n", *ui);
@@ -972,8 +982,8 @@ F2FS_SBI_GENERAL_RO_ATTR(unusable_blocks_per_sec);
/* STAT_INFO ATTR */
#ifdef CONFIG_F2FS_STAT_FS
-STAT_INFO_RO_ATTR(cp_foreground_calls, cp_count);
-STAT_INFO_RO_ATTR(cp_background_calls, bg_cp_count);
+STAT_INFO_RO_ATTR(cp_foreground_calls, cp_call_count[FOREGROUND]);
+STAT_INFO_RO_ATTR(cp_background_calls, cp_call_count[BACKGROUND]);
STAT_INFO_RO_ATTR(gc_foreground_calls, gc_call_count[FOREGROUND]);
STAT_INFO_RO_ATTR(gc_background_calls, gc_call_count[BACKGROUND]);
#endif
