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| author | Jan Kara <jack@suse.cz> | 2016-06-30 11:40:54 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2016-06-30 11:40:54 -0400 |
| commit | 1eaa566d368b214d99cbb973647c1b0b8102a9ae (patch) | |
| tree | 30f6f17f9dbc22a3ca6ff014c1c38a69f645c00d /include/linux/jbd2.h | |
| parent | ab714aff4f744f52f0beae93ed441f2f5585eb7a (diff) | |
| download | linux-1eaa566d368b214d99cbb973647c1b0b8102a9ae.tar.gz linux-1eaa566d368b214d99cbb973647c1b0b8102a9ae.tar.bz2 linux-1eaa566d368b214d99cbb973647c1b0b8102a9ae.zip | |
jbd2: track more dependencies on transaction commit
So far we were tracking only dependency on transaction commit due to
starting a new handle (which may require commit to start a new
transaction). Now add tracking also for other cases where we wait for
transaction commit. This way lockdep can catch deadlocks e. g. because we
call jbd2_journal_stop() for a synchronous handle with some locks held
which rank below transaction start.
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'include/linux/jbd2.h')
| -rw-r--r-- | include/linux/jbd2.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h index 3d210cbe4e1b..dfaa1f4dcb0c 100644 --- a/include/linux/jbd2.h +++ b/include/linux/jbd2.h @@ -1046,6 +1046,12 @@ struct journal_s #endif }; +#define jbd2_might_wait_for_commit(j) \ + do { \ + rwsem_acquire(&j->j_trans_commit_map, 0, 0, _THIS_IP_); \ + rwsem_release(&j->j_trans_commit_map, 1, _THIS_IP_); \ + } while (0) + /* journal feature predicate functions */ #define JBD2_FEATURE_COMPAT_FUNCS(name, flagname) \ static inline bool jbd2_has_feature_##name(journal_t *j) \ |