ext4_num_dirty_pages() will continue scanning after we accumulate
max_pages, possibly for a very long time without doing anything
useful at all. When we hit max_pages, we should set done=1
so that the break will release the pagevec, exit the loop, and
return from the function.
Signed-off-by: Eric Sandeen <sandeen@xxxxxxxxxx>
---
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 4b8debe..d88ba4a 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -1207,8 +1207,10 @@ static pgoff_t ext4_num_dirty_pages(struct inode *inode, pgoff_t idx,
break;
idx++;
num++;
- if (num >= max_pages)
+ if (num >= max_pages) {
+ done = 1;
break;
+ }
}
pagevec_release(&pvec);
}
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