linux-ext4 - [RFC 5/9] ext4: Add commit

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Message-Id: <60daf324eec64f2be0b9ce0e240294d36411037c.1645558375.git.riteshh@linux.ibm.com>
Date:   Wed, 23 Feb 2022 02:04:13 +0530
From:   Ritesh Harjani <riteshh@...ux.ibm.com>
To:     linux-ext4@...r.kernel.org
Cc:     Harshad Shirwadkar <harshadshirwadkar@...il.com>,
        "Theodore Ts'o" <tytso@....edu>, Jan Kara <jack@...e.cz>,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        Ritesh Harjani <riteshh@...ux.ibm.com>
Subject: [RFC 5/9] ext4: Add commit_tid info in jbd debug log

This adds commit_tid argument in ext4_fc_update_stats()
so that we can add this information too in jbd_debug logs.
This is also required in a later patch to pass the commit_tid info in
ext4_fc_commit_start/stop() trace events.

Signed-off-by: Ritesh Harjani <riteshh@...ux.ibm.com>
---
 fs/ext4/fast_commit.c | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/fs/ext4/fast_commit.c b/fs/ext4/fast_commit.c
index 7fb1eceef30c..ee32aac0cbbf 100644
--- a/fs/ext4/fast_commit.c
+++ b/fs/ext4/fast_commit.c
@@ -1127,11 +1127,12 @@ static int ext4_fc_perform_commit(journal_t *journal)
 }
 
 static void ext4_fc_update_stats(struct super_block *sb, int status,
-				 u64 commit_time, int nblks)
+				 u64 commit_time, int nblks, tid_t commit_tid)
 {
 	struct ext4_fc_stats *stats = &EXT4_SB(sb)->s_fc_stats;
 
-	jbd_debug(1, "Fast commit ended with status = %d", status);
+	jbd_debug(1, "Fast commit ended with status = %d for tid %u",
+			status, commit_tid);
 	if (status == EXT4_FC_STATUS_OK) {
 		stats->fc_num_commits++;
 		stats->fc_numblks += nblks;
@@ -1181,14 +1182,16 @@ int ext4_fc_commit(journal_t *journal, tid_t commit_tid)
 		if (atomic_read(&sbi->s_fc_subtid) <= subtid &&
 			commit_tid > journal->j_commit_sequence)
 			goto restart_fc;
-		ext4_fc_update_stats(sb, EXT4_FC_STATUS_SKIPPED, 0, 0);
+		ext4_fc_update_stats(sb, EXT4_FC_STATUS_SKIPPED, 0, 0,
+				commit_tid);
 		return 0;
 	} else if (ret) {
 		/*
 		 * Commit couldn't start. Just update stats and perform a
 		 * full commit.
 		 */
-		ext4_fc_update_stats(sb, EXT4_FC_STATUS_FAILED, 0, 0);
+		ext4_fc_update_stats(sb, EXT4_FC_STATUS_FAILED, 0, 0,
+				commit_tid);
 		return jbd2_complete_transaction(journal, commit_tid);
 	}
 
@@ -1220,12 +1223,12 @@ int ext4_fc_commit(journal_t *journal, tid_t commit_tid)
 	 * don't react too strongly to vast changes in the commit time
 	 */
 	commit_time = ktime_to_ns(ktime_sub(ktime_get(), start_time));
-	ext4_fc_update_stats(sb, status, commit_time, nblks);
+	ext4_fc_update_stats(sb, status, commit_time, nblks, commit_tid);
 	return ret;
 
 fallback:
 	ret = jbd2_fc_end_commit_fallback(journal);
-	ext4_fc_update_stats(sb, status, 0, 0);
+	ext4_fc_update_stats(sb, status, 0, 0, commit_tid);
 	return ret;
 }
 
-- 
2.31.1