Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs

Pull ext3/jbd fixes from Jan Kara:
 "A couple of ext3/jbd fixes"

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  jbd: use kmem_cache_zalloc for allocating journal head
  jbd: use kmem_cache_zalloc instead of kmem_cache_alloc/memset
  jbd: don't wait (forever) for stale tid caused by wraparound
  ext3: fix data=journal fast mount/umount hang

fs/ext3/inode.c

@@ -218,7 +218,8 @@ void ext3_evict_inode (struct inode *inode)
 	 */
 	if (inode->i_nlink && ext3_should_journal_data(inode) &&
 	    EXT3_SB(inode->i_sb)->s_journal &&
-	    (S_ISLNK(inode->i_mode) || S_ISREG(inode->i_mode))) {
+	    (S_ISLNK(inode->i_mode) || S_ISREG(inode->i_mode)) &&
+	    inode->i_ino != EXT3_JOURNAL_INO) {
 		tid_t commit_tid = atomic_read(&ei->i_datasync_tid);
 		journal_t *journal = EXT3_SB(inode->i_sb)->s_journal;
 

fs/jbd/journal.c

@@ -562,6 +562,16 @@ int log_wait_commit(journal_t *journal, tid_t 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)) {
@@ -573,6 +583,7 @@ 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))) {
@@ -1843,7 +1854,7 @@ 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",
@@ -1851,7 +1862,7 @@ 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;
@@ -1913,10 +1924,8 @@ 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)) {

fs/jbd/transaction.c

@@ -245,7 +245,6 @@ static handle_t *new_handle(int nblocks)
 	handle_t *handle = jbd_alloc_handle(GFP_NOFS);
 	if (!handle)
 		return NULL;
-	memset(handle, 0, sizeof(*handle));
 	handle->h_buffer_credits = nblocks;
 	handle->h_ref = 1;
 

include/linux/jbd.h

@@ -887,7 +887,7 @@ extern struct kmem_cache *jbd_handle_cache;
 
 static inline handle_t *jbd_alloc_handle(gfp_t gfp_flags)
 {
-	return kmem_cache_alloc(jbd_handle_cache, gfp_flags);
+	return kmem_cache_zalloc(jbd_handle_cache, gfp_flags);
 }
 
 static inline void jbd_free_handle(handle_t *handle)