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Btrfs: catch errors from btrfs_sync_log 

btrfs_sync_log returns -EAGAIN when we need full transaction commits
instead of small log commits, but sometimes we were dropping the return
value.

In practice, we check for this a few different ways, but this is still a
bug that can leave off full log commits when we really need them.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2011-01-31 16:48:24 -05:00
parent b1953bcec9
commit b31eabd86e
1 changed files with 2 additions and 1 deletions
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3
fs/btrfs/tree-log.c
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@ -2051,6 +2051,7 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
wait_log_commit(trans, log_root_tree, wait_log_commit(trans, log_root_tree,
log_root_tree->log_transid); log_root_tree->log_transid);
mutex_unlock(&log_root_tree->log_mutex); mutex_unlock(&log_root_tree->log_mutex);
ret = 0;
goto out; goto out;
} }
atomic_set(&log_root_tree->log_commit[index2], 1); atomic_set(&log_root_tree->log_commit[index2], 1);
@ -2115,7 +2116,7 @@ out:
smp_mb(); smp_mb();
if (waitqueue_active(&root->log_commit_wait[index1])) if (waitqueue_active(&root->log_commit_wait[index1]))
wake_up(&root->log_commit_wait[index1]); wake_up(&root->log_commit_wait[index1]);
return 0; return ret;
} }
static void free_log_tree(struct btrfs_trans_handle *trans, static void free_log_tree(struct btrfs_trans_handle *trans,