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-rw-r--r--fs/jbd/checkpoint.c19
1 files changed, 17 insertions, 2 deletions
diff --git a/fs/jbd/checkpoint.c b/fs/jbd/checkpoint.c
index fe852193324..1bd8d4acc6f 100644
--- a/fs/jbd/checkpoint.c
+++ b/fs/jbd/checkpoint.c
@@ -127,14 +127,29 @@ void __log_wait_for_space(journal_t *journal)
/*
* Test again, another process may have checkpointed while we
- * were waiting for the checkpoint lock
+ * were waiting for the checkpoint lock. If there are no
+ * outstanding transactions there is nothing to checkpoint and
+ * we can't make progress. Abort the journal in this case.
*/
spin_lock(&journal->j_state_lock);
+ spin_lock(&journal->j_list_lock);
nblocks = jbd_space_needed(journal);
if (__log_space_left(journal) < nblocks) {
+ int chkpt = journal->j_checkpoint_transactions != NULL;
+
+ spin_unlock(&journal->j_list_lock);
spin_unlock(&journal->j_state_lock);
- log_do_checkpoint(journal);
+ if (chkpt) {
+ log_do_checkpoint(journal);
+ } else {
+ printk(KERN_ERR "%s: no transactions\n",
+ __func__);
+ journal_abort(journal, 0);
+ }
+
spin_lock(&journal->j_state_lock);
+ } else {
+ spin_unlock(&journal->j_list_lock);
}
mutex_unlock(&journal->j_checkpoint_mutex);
}