From 99e3964e0deb2f6ded9624262bcbd8b077963f7d Mon Sep 17 00:00:00 2001
From: Jin Qian <jinqian@google.com>
Date: Thu, 27 Jul 2017 16:17:17 -0700
Subject: [PATCH] fastboot: enable uninit_bg for ext4

This speeds up mke2fs as well as e2fsck.

Bug: 23686092
Bug: 64032335
Change-Id: I9f2d4c15e431647bb845d50a2361b2a9a091fba6
---
 fastboot/fs.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fastboot/fs.cpp b/fastboot/fs.cpp
index f3c000eb7..6058b882d 100644
--- a/fastboot/fs.cpp
+++ b/fastboot/fs.cpp
@@ -91,6 +91,8 @@ static int generate_ext4_image(const char* fileName, long long partSize,
     }
     mke2fs_args.push_back("-E");
     mke2fs_args.push_back(ext_attr.c_str());
+    mke2fs_args.push_back("-O");
+    mke2fs_args.push_back("uninit_bg");
     mke2fs_args.push_back(fileName);
 
     std::string size_str = std::to_string(partSize / block_size);