diff --git a/README.md b/README.md
index 2f777d8..e668380 100644
--- a/README.md
+++ b/README.md
@@ -86,6 +86,13 @@ $ mklittlefs --version
 ./mklittlefs  version: 0.2.3-6-g9a0e072
 ```
 
+## Cross-compiling
+
+To build for all cross compiled targets, run
+```
+docker run --user $(id -u):$(id -g) --rm -v $(pwd):/workdir earlephilhower/gcc-cross bash -c "cd /workdir; bash build-cross.sh"
+```
+
 
 ## License
 
diff --git a/littlefs b/littlefs
index 0907ba7..f35fb8c 160000
--- a/littlefs
+++ b/littlefs
@@ -1 +1 @@
-Subproject commit 0907ba7813173901bc9a7689e8781434629a3696
+Subproject commit f35fb8c14866a4a4677756f6dbeca78f8a9b4001
diff --git a/main.cpp b/main.cpp
index 88e5c1e..64d3074 100644
--- a/main.cpp
+++ b/main.cpp
@@ -92,12 +92,19 @@ void setLfsConfig()
   s_cfg.erase = lfs_flash_erase;
   s_cfg.sync  = lfs_flash_sync;
 
-  s_cfg.read_size = s_blockSize;
-  s_cfg.prog_size = s_blockSize;
-  s_cfg.block_size = s_blockSize;
+  s_cfg.read_size = 64;
+  s_cfg.prog_size = 64;
+  s_cfg.block_size =  s_blockSize;
   s_cfg.block_count = s_flashmem.size() / s_blockSize;
-  s_cfg.cache_size = s_blockSize;
-  s_cfg.lookahead_size = 128;
+  s_cfg.block_cycles = 16; // TODO - need better explanation
+  s_cfg.cache_size = 64;
+  s_cfg.lookahead_size = 64;
+  s_cfg.read_buffer = nullptr;
+  s_cfg.prog_buffer = nullptr;
+  s_cfg.lookahead_buffer = nullptr;
+  s_cfg.name_max = 0;
+  s_cfg.file_max = 0;
+  s_cfg.attr_max = 0;
 }
 
 int littlefsTryMount() {