Showing error 614

User: Jiri Slaby
Error type: Double Unlock
Error type description: Some lock is unlocked twice unintentionally in a sequence
File location: fs/jbd/checkpoint.c
Line in file: 401
Project: Linux Kernel
Project version: 2.6.28
Tools: Stanse (1.2)
Entered: 2011-11-07 22:20:57 UTC

Source: 

371        transaction = journal->j_checkpoint_transactions;
372        this_tid = transaction->t_tid;
373restart:
374        /*
375         * If someone cleaned up this transaction while we slept, we're
376         * done (maybe it's a new transaction, but it fell at the same
377         * address).
378         */
379        if (journal->j_checkpoint_transactions == transaction &&
380                        transaction->t_tid == this_tid) {
381                int batch_count = 0;
382                struct buffer_head *bhs[NR_BATCH];
383                struct journal_head *jh;
384                int retry = 0, err;
385
386                while (!retry && transaction->t_checkpoint_list) {
387                        struct buffer_head *bh;
388
389                        jh = transaction->t_checkpoint_list;
390                        bh = jh2bh(jh);
391                        if (!jbd_trylock_bh_state(bh)) {
392                                jbd_sync_bh(journal, bh);
393                                retry = 1;
394                                break;
395                        }
396                        retry = __process_buffer(journal, jh, bhs,&batch_count);
397                        if (retry < 0 && !result)
398                                result = retry;
399                        if (!retry && (need_resched() ||
400                                spin_needbreak(&journal->j_list_lock))) {
401                                spin_unlock(&journal->j_list_lock);
402                                retry = 1;
403                                break;
404                        }
405                }
406
407                if (batch_count) {
408                        if (!retry) {
409                                spin_unlock(&journal->j_list_lock);
410                                retry = 1;
411                        }
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