add patch for fs_mgr overlay threshold

system/core/0001-Stop-overriding-system-properties-from-vendor.patch

@@ -1,7 +1,7 @@
 From 6e17845221ec781e003432b96c1d08dc582859f3 Mon Sep 17 00:00:00 2001
 From: Pierre-Hugues Husson <phh@phh.me>
 Date: Thu, 7 Oct 2021 15:48:11 -0400
-Subject: [PATCH 1/3] Stop overriding system properties from vendor
+Subject: [PATCH 1/4] Stop overriding system properties from vendor
 
 This is annoying to disable apexes, or force adb
 

system/core/0002-init-Do-not-start-console-service-when-debuggable.patch

@@ -1,7 +1,7 @@
 From 40f60ce5f786f8121aebcb8e1521d2edb5bb7f43 Mon Sep 17 00:00:00 2001
 From: Isaac Chen <tingyi364@gmail.com>
 Date: Wed, 23 Jun 2021 13:07:30 +0800
-Subject: [PATCH 2/3] init: Do not start console service when debuggable
+Subject: [PATCH 2/4] init: Do not start console service when debuggable
 
 Google added a check for this in R, when it's running it will show a
 notification about that performance is impacted.

system/core/0003-remount-Fix-failure-for-system-as-root.patch

@@ -1,7 +1,7 @@
 From 74faf05b941682bd1930b92ae879c8baba09d6ac Mon Sep 17 00:00:00 2001
 From: Leo Yan <leo.yan@linaro.org>
 Date: Fri, 4 Jun 2021 15:19:33 +0100
-Subject: [PATCH 3/3] remount: Fix failure for system-as-root
+Subject: [PATCH 3/4] remount: Fix failure for system-as-root
 
 Since commit 5ad7b3cbc5c1 ("Try to remount mounted points only"), the
 system-as-root cannot be remounted successfully when execute command

system/core/0004-fs_mgr-trigger-the-use-of-overlayfs-earlier.patch

@@ -0,0 +1,35 @@
+From df349dcccc43dc45f4ff0ba8eb10c3f59f4f4f17 Mon Sep 17 00:00:00 2001
+From: Peter Cai <peter@typeblog.net>
+Date: Thu, 28 Apr 2022 21:22:30 -0400
+Subject: [PATCH 4/4] fs_mgr: trigger the use of overlayfs earlier
+
+At 1%, it's barely useable to do anything at all if remounted rw
+---
+ fs_mgr/fs_mgr_overlayfs.cpp | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/fs_mgr/fs_mgr_overlayfs.cpp b/fs_mgr/fs_mgr_overlayfs.cpp
+index 4d32bda80..ec6fef89a 100644
+--- a/fs_mgr/fs_mgr_overlayfs.cpp
++++ b/fs_mgr/fs_mgr_overlayfs.cpp
+@@ -176,7 +176,7 @@ bool fs_mgr_dir_is_writable(const std::string& path) {
+     return ret | !rmdir(test_directory.c_str());
+ }
+ 
+-// At less than 1% or 8MB of free space return value of false,
++// At less than 20% or 8MB of free space return value of false,
+ // means we will try to wrap with overlayfs.
+ bool fs_mgr_filesystem_has_space(const std::string& mount_point) {
+     // If we have access issues to find out space remaining, return true
+@@ -188,7 +188,7 @@ bool fs_mgr_filesystem_has_space(const std::string& mount_point) {
+         return true;
+     }
+ 
+-    static constexpr int kPercentThreshold = 1;                       // 1%
++    static constexpr int kPercentThreshold = 20;                      // 20%
+     static constexpr unsigned long kSizeThreshold = 8 * 1024 * 1024;  // 8MB
+ 
+     return (vst.f_bfree >= (vst.f_blocks * kPercentThreshold / 100)) &&
+-- 
+2.36.0
+