diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 86536e9f019c..7c839f00bbd4 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -71,6 +71,8 @@ extern const char *f2fs_fault_name[FAULT_MAX];
 #define IS_FAULT_SET(fi, type) ((fi)->inject_type & (1 << (type)))
 #endif
 
+#define MIN_ROOT_RESERVED_BLOCKS (128 * 1024 * 1024U)
+
 /*
  * For mount options
  */
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 9e53a5a00f8d..8149fd884352 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -215,7 +215,8 @@ static inline void limit_reserve_root(struct f2fs_sb_info *sbi)
 {
 	block_t limit = (sbi->user_block_count << 1) / 1000;
 
-	/* limit is 0.2% */
+	/* limit is 0.2%, and cannot be too small */
+	limit = max(limit, MIN_ROOT_RESERVED_BLOCKS);
 	if (test_opt(sbi, RESERVE_ROOT) &&
 			F2FS_OPTION(sbi).root_reserved_blocks > limit) {
 		F2FS_OPTION(sbi).root_reserved_blocks = limit;