Searched hist:"1 eaa566d368b214d99cbb973647c1b0b8102a9ae" (Results 1 – 1 of 1) sorted by relevance
/linux/fs/jbd2/ |
H A D | transaction.c | diff e03a9976afce6634826d56c33531dd10bb9a9166 Thu Sep 22 17:44:06 CEST 2016 Jan Kara <jack@suse.cz> jbd2: fix lockdep annotation in add_transaction_credits()
Thomas has reported a lockdep splat hitting in add_transaction_credits(). The problem is that that function calls jbd2_might_wait_for_commit() while holding j_state_lock which is wrong (we do not really wait for transaction commit while holding that lock).
Fix the problem by moving jbd2_might_wait_for_commit() into places where we are ready to wait for transaction commit and thus j_state_lock is unlocked.
Cc: stable@vger.kernel.org Fixes: 1eaa566d368b214d99cbb973647c1b0b8102a9ae Reported-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Theodore Ts'o <tytso@mit.edu> diff 1eaa566d368b214d99cbb973647c1b0b8102a9ae Thu Jun 30 17:40:54 CEST 2016 Jan Kara <jack@suse.cz> 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>
|