diff options
Diffstat (limited to 'fs/jbd/journal.c')
| -rw-r--r-- | fs/jbd/journal.c | 59 |
1 files changed, 44 insertions, 15 deletions
diff --git a/fs/jbd/journal.c b/fs/jbd/journal.c index 425c2f2cf17..06fe11e0abf 100644 --- a/fs/jbd/journal.c +++ b/fs/jbd/journal.c @@ -90,6 +90,24 @@ static int journal_convert_superblock_v1(journal_t *, journal_superblock_t *); static void __journal_abort_soft (journal_t *journal, int errno); static const char *journal_dev_name(journal_t *journal, char *buffer); +#ifdef CONFIG_JBD_DEBUG +void __jbd_debug(int level, const char *file, const char *func, + unsigned int line, const char *fmt, ...) +{ + struct va_format vaf; + va_list args; + + if (level > journal_enable_debug) + return; + va_start(args, fmt); + vaf.fmt = fmt; + vaf.va = &args; + printk(KERN_DEBUG "%s: (%s, %u): %pV\n", file, func, line, &vaf); + va_end(args); +} +EXPORT_SYMBOL(__jbd_debug); +#endif + /* * Helper function used to manage commit timeouts */ @@ -310,8 +328,6 @@ int journal_write_metadata_buffer(transaction_t *transaction, new_bh = alloc_buffer_head(GFP_NOFS|__GFP_NOFAIL); /* keep subsequent assertions sane */ - new_bh->b_state = 0; - init_buffer(new_bh, NULL, NULL); atomic_set(&new_bh->b_count, 1); new_jh = journal_add_journal_head(new_bh); /* This sleeps */ @@ -446,7 +462,8 @@ int __log_start_commit(journal_t *journal, tid_t target) * currently running transaction (if it exists). Otherwise, * the target tid must be an old one. */ - if (journal->j_running_transaction && + if (journal->j_commit_request != target && + journal->j_running_transaction && journal->j_running_transaction->t_tid == target) { /* * We want a new commit: OK, mark the request and wakeup the @@ -534,8 +551,8 @@ int journal_start_commit(journal_t *journal, tid_t *ptid) ret = 1; } else if (journal->j_committing_transaction) { /* - * If ext3_write_super() recently started a commit, then we - * have to wait for completion of that transaction + * If commit has been started, then we have to wait for + * completion of that transaction. */ if (ptid) *ptid = journal->j_committing_transaction->t_tid; @@ -556,13 +573,23 @@ int log_wait_commit(journal_t *journal, tid_t tid) #ifdef CONFIG_JBD_DEBUG spin_lock(&journal->j_state_lock); if (!tid_geq(journal->j_commit_request, tid)) { - printk(KERN_EMERG + printk(KERN_ERR "%s: error: j_commit_request=%d, tid=%d\n", __func__, journal->j_commit_request, tid); } spin_unlock(&journal->j_state_lock); #endif spin_lock(&journal->j_state_lock); + /* + * Not running or committing trans? Must be already committed. This + * saves us from waiting for a *long* time when tid overflows. + */ + if (!((journal->j_running_transaction && + journal->j_running_transaction->t_tid == tid) || + (journal->j_committing_transaction && + journal->j_committing_transaction->t_tid == tid))) + goto out_unlock; + if (!tid_geq(journal->j_commit_waited, tid)) journal->j_commit_waited = tid; while (tid_gt(tid, journal->j_commit_sequence)) { @@ -574,12 +601,11 @@ int log_wait_commit(journal_t *journal, tid_t tid) !tid_gt(tid, journal->j_commit_sequence)); spin_lock(&journal->j_state_lock); } +out_unlock: spin_unlock(&journal->j_state_lock); - if (unlikely(is_journal_aborted(journal))) { - printk(KERN_EMERG "journal commit I/O error\n"); + if (unlikely(is_journal_aborted(journal))) err = -EIO; - } return err; } @@ -1113,6 +1139,11 @@ static void mark_journal_empty(journal_t *journal) BUG_ON(!mutex_is_locked(&journal->j_checkpoint_mutex)); spin_lock(&journal->j_state_lock); + /* Is it already empty? */ + if (sb->s_start == 0) { + spin_unlock(&journal->j_state_lock); + return; + } jbd_debug(1, "JBD: Marking journal as empty (seq %d)\n", journal->j_tail_sequence); @@ -1839,7 +1870,7 @@ static struct journal_head *journal_alloc_journal_head(void) #ifdef CONFIG_JBD_DEBUG atomic_inc(&nr_journal_heads); #endif - ret = kmem_cache_alloc(journal_head_cache, GFP_NOFS); + ret = kmem_cache_zalloc(journal_head_cache, GFP_NOFS); if (ret == NULL) { jbd_debug(1, "out of memory for journal_head\n"); printk_ratelimited(KERN_NOTICE "ENOMEM in %s, retrying.\n", @@ -1847,7 +1878,7 @@ static struct journal_head *journal_alloc_journal_head(void) while (ret == NULL) { yield(); - ret = kmem_cache_alloc(journal_head_cache, GFP_NOFS); + ret = kmem_cache_zalloc(journal_head_cache, GFP_NOFS); } } return ret; @@ -1909,10 +1940,8 @@ struct journal_head *journal_add_journal_head(struct buffer_head *bh) struct journal_head *new_jh = NULL; repeat: - if (!buffer_jbd(bh)) { + if (!buffer_jbd(bh)) new_jh = journal_alloc_journal_head(); - memset(new_jh, 0, sizeof(*new_jh)); - } jbd_lock_bh_journal_head(bh); if (buffer_jbd(bh)) { @@ -2105,7 +2134,7 @@ static void __exit journal_exit(void) #ifdef CONFIG_JBD_DEBUG int n = atomic_read(&nr_journal_heads); if (n) - printk(KERN_EMERG "JBD: leaked %d journal_heads!\n", n); + printk(KERN_ERR "JBD: leaked %d journal_heads!\n", n); #endif jbd_remove_debugfs_entry(); journal_destroy_caches(); |