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| author | Harshad Shirwadkar <harshadshirwadkar@gmail.com> | 2020-10-15 13:38:01 -0700 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2020-10-21 23:22:38 -0400 |
| commit | ce8c59d197c824789e1ade6f25d36037b4f0faeb (patch) | |
| tree | 45bfb01966b90868489244222bf3fc3363d5a1b7 | |
| parent | 0f0672ffb61aebac906cf0aa1607d1f07f266fb6 (diff) | |
| download | ext4-ce8c59d197c824789e1ade6f25d36037b4f0faeb.tar.gz | |
ext4: add fast commit stats in procfs
This commit adds a file in procfs that tracks fast commit related
statistics.
root@kvm-xfstests:/mnt# cat /proc/fs/ext4/vdc/fc_info
fc stats:
7772 commits
15 ineligible
4083 numblks
2242us avg_commit_time
Ineligible reasons:
"Extended attributes changed": 0
"Cross rename": 0
"Journal flag changed": 0
"Insufficient memory": 0
"Swap boot": 0
"Resize": 0
"Dir renamed": 0
"Falloc range op": 0
"FC Commit Failed": 15
Signed-off-by: Harshad Shirwadkar <harshadshirwadkar@gmail.com>
Link: https://lore.kernel.org/r/20201015203802.3597742-10-harshadshirwadkar@gmail.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
| -rw-r--r-- | fs/ext4/ext4.h | 2 | ||||
| -rw-r--r-- | fs/ext4/fast_commit.c | 34 | ||||
| -rw-r--r-- | fs/ext4/sysfs.c | 2 |
3 files changed, 37 insertions, 1 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 152500725acf0c..0906fd48424bd0 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -2740,7 +2740,7 @@ extern int ext4_init_inode_table(struct super_block *sb, extern void ext4_end_bitmap_read(struct buffer_head *bh, int uptodate); /* fast_commit.c */ - +int ext4_fc_info_show(struct seq_file *seq, void *v); void ext4_fc_init(struct super_block *sb, journal_t *journal); void ext4_fc_init_inode(struct inode *inode); void ext4_fc_track_range(struct inode *inode, ext4_lblk_t start, diff --git a/fs/ext4/fast_commit.c b/fs/ext4/fast_commit.c index 426c0ab8b70c43..447c8d93f48081 100644 --- a/fs/ext4/fast_commit.c +++ b/fs/ext4/fast_commit.c @@ -2093,6 +2093,40 @@ void ext4_fc_init(struct super_block *sb, journal_t *journal) } } +const char *fc_ineligible_reasons[] = { + "Extended attributes changed", + "Cross rename", + "Journal flag changed", + "Insufficient memory", + "Swap boot", + "Resize", + "Dir renamed", + "Falloc range op", + "FC Commit Failed" +}; + +int ext4_fc_info_show(struct seq_file *seq, void *v) +{ + struct ext4_sb_info *sbi = EXT4_SB((struct super_block *)seq->private); + struct ext4_fc_stats *stats = &sbi->s_fc_stats; + int i; + + if (v != SEQ_START_TOKEN) + return 0; + + seq_printf(seq, + "fc stats:\n%ld commits\n%ld ineligible\n%ld numblks\n%lluus avg_commit_time\n", + stats->fc_num_commits, stats->fc_ineligible_commits, + stats->fc_numblks, + div_u64(sbi->s_fc_avg_commit_time, 1000)); + seq_puts(seq, "Ineligible reasons:\n"); + for (i = 0; i < EXT4_FC_REASON_MAX; i++) + seq_printf(seq, "\"%s\":\t%d\n", fc_ineligible_reasons[i], + stats->fc_ineligible_reason_count[i]); + + return 0; +} + int __init ext4_fc_init_dentry_cache(void) { ext4_fc_dentry_cachep = KMEM_CACHE(ext4_fc_dentry_update, diff --git a/fs/ext4/sysfs.c b/fs/ext4/sysfs.c index bfabb799fa451a..5ff33d18996a85 100644 --- a/fs/ext4/sysfs.c +++ b/fs/ext4/sysfs.c @@ -521,6 +521,8 @@ int ext4_register_sysfs(struct super_block *sb) proc_create_single_data("es_shrinker_info", S_IRUGO, sbi->s_proc, ext4_seq_es_shrinker_info_show, sb); + proc_create_single_data("fc_info", 0444, sbi->s_proc, + ext4_fc_info_show, sb); proc_create_seq_data("mb_groups", S_IRUGO, sbi->s_proc, &ext4_mb_seq_groups_ops, sb); } |