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authorJan Kara <jack@suse.cz>2019-11-05 19:44:24 +0300
committerTheodore Ts'o <tytso@mit.edu>2019-11-06 00:00:48 +0300
commit9f356e5a4f12008fa0df8b6385fc0ab830416e72 (patch)
tree6ec4a24cc440123cd810bf520c609d01abe0ebd3 /fs/jbd2/commit.c
parentec8b6f600e49dc87a8564807fec4193bf93ee2b5 (diff)
downloadlinux-9f356e5a4f12008fa0df8b6385fc0ab830416e72.tar.xz
jbd2: Account descriptor blocks into t_outstanding_credits
Currently, journal descriptor blocks were not accounted in transaction->t_outstanding_credits and we were just leaving some slack space in the journal for them (in jbd2_log_space_left() and jbd2_space_needed()). This is making proper accounting (and reservation we want to add) of descriptor blocks difficult so switch to accounting descriptor blocks in transaction->t_outstanding_credits and just reserve the same amount of credits in t_outstanding credits for journal descriptor blocks when creating transaction. Signed-off-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/20191105164437.32602-18-jack@suse.cz Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/jbd2/commit.c')
-rw-r--r--fs/jbd2/commit.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/fs/jbd2/commit.c b/fs/jbd2/commit.c
index b67e2d0cff88..9047f8e269d0 100644
--- a/fs/jbd2/commit.c
+++ b/fs/jbd2/commit.c
@@ -560,8 +560,7 @@ void jbd2_journal_commit_transaction(journal_t *journal)
stats.run.rs_logging = jiffies;
stats.run.rs_flushing = jbd2_time_diff(stats.run.rs_flushing,
stats.run.rs_logging);
- stats.run.rs_blocks =
- atomic_read(&commit_transaction->t_outstanding_credits);
+ stats.run.rs_blocks = commit_transaction->t_nr_buffers;
stats.run.rs_blocks_logged = 0;
J_ASSERT(commit_transaction->t_nr_buffers <=
@@ -889,6 +888,9 @@ start_journal_io:
if (err)
jbd2_journal_abort(journal, err);
+ WARN_ON_ONCE(
+ atomic_read(&commit_transaction->t_outstanding_credits) < 0);
+
/*
* Now disk caches for filesystem device are flushed so we are safe to
* erase checkpointed transactions from the log by updating journal