btrfs-progs: Do not free dirty extent buffer

free_some_buffer() should not free dirty extent buffers. They are left
to be committed.

Signed-off-by: Naohiro Aota <naota@elisp.net>
Signed-off-by: David Sterba <dsterba@suse.cz>

diff --git a/extent_io.c b/extent_io.c
index a127e54..1df377d 100644 (file)
--- a/extent_io.c
+++ b/extent_io.c
@@ -552,7 +552,7 @@ static int free_some_buffers(struct extent_io_tree *tree)
 
        list_for_each_safe(node, next, &tree->lru) {
                eb = list_entry(node, struct extent_buffer, lru);
-               if (eb->refs == 1) {
+               if (eb->refs == 1 && !(eb->flags & EXTENT_DIRTY)) {
                        free_extent_buffer(eb);
                        if (tree->cache_size < cache_hard_max)
                                break;