[PATCH AUTOSEL 4.14 17/58] jbd2: Fix statistics for the number of logged blocks

From: Sasha Levin
Date: Wed Dec 11 2019 - 10:33:00 EST


From: Jan Kara <jack@xxxxxxx>

[ Upstream commit 015c6033068208d6227612c878877919f3fcf6b6 ]

jbd2 statistics counting number of blocks logged in a transaction was
wrong. It didn't count the commit block and more importantly it didn't
count revoke descriptor blocks. Make sure these get properly counted.

Reviewed-by: Theodore Ts'o <tytso@xxxxxxx>
Signed-off-by: Jan Kara <jack@xxxxxxx>
Link: https://lore.kernel.org/r/20191105164437.32602-13-jack@xxxxxxx
Signed-off-by: Theodore Ts'o <tytso@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
fs/jbd2/commit.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs/jbd2/commit.c b/fs/jbd2/commit.c
index 0567b17a970c2..7dd6133925921 100644
--- a/fs/jbd2/commit.c
+++ b/fs/jbd2/commit.c
@@ -726,7 +726,6 @@ start_journal_io:
submit_bh(REQ_OP_WRITE, REQ_SYNC, bh);
}
cond_resched();
- stats.run.rs_blocks_logged += bufs;

/* Force a new descriptor to be generated next
time round the loop. */
@@ -813,6 +812,7 @@ start_journal_io:
if (unlikely(!buffer_uptodate(bh)))
err = -EIO;
jbd2_unfile_log_bh(bh);
+ stats.run.rs_blocks_logged++;

/*
* The list contains temporary buffer heads created by
@@ -858,6 +858,7 @@ start_journal_io:
BUFFER_TRACE(bh, "ph5: control buffer writeout done: unfile");
clear_buffer_jwrite(bh);
jbd2_unfile_log_bh(bh);
+ stats.run.rs_blocks_logged++;
__brelse(bh); /* One for getblk */
/* AKPM: bforget here */
}
@@ -879,6 +880,7 @@ start_journal_io:
}
if (cbh)
err = journal_wait_on_commit_record(journal, cbh);
+ stats.run.rs_blocks_logged++;
if (jbd2_has_feature_async_commit(journal) &&
journal->j_flags & JBD2_BARRIER) {
blkdev_issue_flush(journal->j_dev, GFP_NOFS, NULL);
--
2.20.1