From 15cda713b2351aa8dafb94ff1ab94559bf1254fd Mon Sep 17 00:00:00 2001
From: Naohiro Aota <naota@elisp.net>
Date: Mon, 25 Aug 2014 14:09:07 +0900
Subject: [PATCH] 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>
---
 extent_io.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/extent_io.c b/extent_io.c
index a127e543..1df377d8 100644
--- 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;