Add build support for LZ4 ramdisks
Ramdisks are currently compressed using gzip, which is generally
smaller, but slower to decompress than lz4. Provide an option for an
lz4 scheme to reduce the time taken to unpack initramfs during boot.
Bug: 156129966
Signed-off-by: J. Avila <elavila@google.com>
Change-Id: Iac9538e6ee6ec51e6b487de2101f53bb5d9c54c8
diff --git a/core/Makefile b/core/Makefile
index 6ae7992..73f9b60 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -606,16 +606,27 @@
$(call dist-for-goals, sdk win_sdk sdk_addon, $(INSTALLED_FILES_FILE_RAMDISK))
BUILT_RAMDISK_TARGET := $(PRODUCT_OUT)/ramdisk.img
+ifeq ($(BOARD_RAMDISK_USE_LZ4),true)
+# -l enables the legacy format used by the Linux kernel
+COMPRESSION_COMMAND_DEPS := $(LZ4)
+COMPRESSION_COMMAND := $(LZ4) -l -12 --favor-decSpeed
+RAMDISK_EXT := .lz4
+else
+COMPRESSION_COMMAND_DEPS := $(MINIGZIP)
+COMPRESSION_COMMAND := $(MINIGZIP)
+RAMDISK_EXT := .gz
+endif
+
# We just build this directly to the install location.
INSTALLED_RAMDISK_TARGET := $(BUILT_RAMDISK_TARGET)
-$(INSTALLED_RAMDISK_TARGET): $(MKBOOTFS) $(INTERNAL_RAMDISK_FILES) $(INSTALLED_FILES_FILE_RAMDISK) | $(MINIGZIP)
+$(INSTALLED_RAMDISK_TARGET): $(MKBOOTFS) $(INTERNAL_RAMDISK_FILES) $(INSTALLED_FILES_FILE_RAMDISK) | $(COMPRESSION_COMMAND_DEPS)
$(call pretty,"Target ram disk: $@")
- $(hide) $(MKBOOTFS) -d $(TARGET_OUT) $(TARGET_RAMDISK_OUT) | $(MINIGZIP) > $@
+ $(hide) $(MKBOOTFS) -d $(TARGET_OUT) $(TARGET_RAMDISK_OUT) | $(COMPRESSION_COMMAND) > $@
.PHONY: ramdisk-nodeps
-ramdisk-nodeps: $(MKBOOTFS) | $(MINIGZIP)
+ramdisk-nodeps: $(MKBOOTFS) | $(COMPRESSION_COMMAND_DEPS)
@echo "make $@: ignoring dependencies"
- $(hide) $(MKBOOTFS) -d $(TARGET_OUT) $(TARGET_RAMDISK_OUT) | $(MINIGZIP) > $(INSTALLED_RAMDISK_TARGET)
+ $(hide) $(MKBOOTFS) -d $(TARGET_OUT) $(TARGET_RAMDISK_OUT) | $(COMPRESSION_COMMAND) > $(INSTALLED_RAMDISK_TARGET)
endif # BUILDING_RAMDISK_IMAGE
@@ -789,8 +800,8 @@
$(ALL_DEFAULT_INSTALLED_MODULES))
INTERNAL_VENDOR_RAMDISK_TARGET := $(call intermediates-dir-for,PACKAGING,vendor-boot)/vendor-ramdisk.cpio.gz
-$(INTERNAL_VENDOR_RAMDISK_TARGET): $(MKBOOTFS) $(INTERNAL_VENDOR_RAMDISK_FILES) | $(MINIGZIP)
- $(MKBOOTFS) -d $(TARGET_OUT) $(TARGET_VENDOR_RAMDISK_OUT) | $(MINIGZIP) > $@
+$(INTERNAL_VENDOR_RAMDISK_TARGET): $(MKBOOTFS) $(INTERNAL_VENDOR_RAMDISK_FILES) | $(COMPRESSION_COMMAND_DEPS)
+ $(MKBOOTFS) -d $(TARGET_OUT) $(TARGET_VENDOR_RAMDISK_OUT) | $(COMPRESSION_COMMAND) > $@
ifdef BOARD_INCLUDE_DTB_IN_BOOTIMG
INTERNAL_VENDOR_BOOTIMAGE_ARGS += --dtb $(INSTALLED_DTBIMAGE_TARGET)
@@ -1671,7 +1682,7 @@
BOARD_RECOVERY_MKBOOTIMG_ARGS := $(BOARD_MKBOOTIMG_ARGS)
endif
-$(recovery_ramdisk): $(MKBOOTFS) $(MINIGZIP) \
+$(recovery_ramdisk): $(MKBOOTFS) $(COMPRESSION_COMMAND_DEPS) \
$(INTERNAL_ROOT_FILES) \
$(INSTALLED_RAMDISK_TARGET) \
$(INTERNAL_RECOVERYIMAGE_FILES) \
@@ -1706,7 +1717,7 @@
cp -f $(recovery_wipe) $(TARGET_RECOVERY_ROOT_OUT)/system/etc/recovery.wipe)
ln -sf prop.default $(TARGET_RECOVERY_ROOT_OUT)/default.prop
$(BOARD_RECOVERY_IMAGE_PREPARE)
- $(MKBOOTFS) -d $(TARGET_OUT) $(TARGET_RECOVERY_ROOT_OUT) | $(MINIGZIP) > $(recovery_ramdisk)
+ $(MKBOOTFS) -d $(TARGET_OUT) $(TARGET_RECOVERY_ROOT_OUT) | $(COMPRESSION_COMMAND) > $(recovery_ramdisk)
# $(1): output file
# $(2): kernel file
@@ -1864,22 +1875,22 @@
# Depends on ramdisk.img, note that some target has ramdisk.img but no boot.img, e.g., emulator.
$(INSTALLED_DEBUG_RAMDISK_TARGET): $(INSTALLED_RAMDISK_TARGET)
endif # BOARD_USES_RECOVERY_AS_BOOT
-$(INSTALLED_DEBUG_RAMDISK_TARGET): $(MKBOOTFS) $(INTERNAL_DEBUG_RAMDISK_FILES) | $(MINIGZIP)
+$(INSTALLED_DEBUG_RAMDISK_TARGET): $(MKBOOTFS) $(INTERNAL_DEBUG_RAMDISK_FILES) | $(COMPRESSION_COMMAND_DEPS)
$(call pretty,"Target debug ram disk: $@")
mkdir -p $(TARGET_DEBUG_RAMDISK_OUT)
touch $(TARGET_DEBUG_RAMDISK_OUT)/force_debuggable
rsync -a $(DEBUG_RAMDISK_SYNC_DIR)/ $(DEBUG_RAMDISK_ROOT_DIR)
- $(MKBOOTFS) -d $(TARGET_OUT) $(DEBUG_RAMDISK_ROOT_DIR) | $(MINIGZIP) > $@
+ $(MKBOOTFS) -d $(TARGET_OUT) $(DEBUG_RAMDISK_ROOT_DIR) | $(COMPRESSION_COMMAND) > $@
.PHONY: ramdisk_debug-nodeps
ramdisk_debug-nodeps: DEBUG_RAMDISK_SYNC_DIR := $(my_debug_ramdisk_sync_dir)
ramdisk_debug-nodeps: DEBUG_RAMDISK_ROOT_DIR := $(my_debug_ramdisk_root_dir)
-ramdisk_debug-nodeps: $(MKBOOTFS) | $(MINIGZIP)
+ramdisk_debug-nodeps: $(MKBOOTFS) | $(COMPRESSION_COMMAND_DEPS)
echo "make $@: ignoring dependencies"
mkdir -p $(TARGET_DEBUG_RAMDISK_OUT)
touch $(TARGET_DEBUG_RAMDISK_OUT)/force_debuggable
rsync -a $(DEBUG_RAMDISK_SYNC_DIR)/ $(DEBUG_RAMDISK_ROOT_DIR)
- $(MKBOOTFS) -d $(TARGET_OUT) $(DEBUG_RAMDISK_ROOT_DIR) | $(MINIGZIP) > $(INSTALLED_DEBUG_RAMDISK_TARGET)
+ $(MKBOOTFS) -d $(TARGET_OUT) $(DEBUG_RAMDISK_ROOT_DIR) | $(COMPRESSION_COMMAND) > $(INSTALLED_DEBUG_RAMDISK_TARGET)
my_debug_ramdisk_sync_dir :=
my_debug_ramdisk_root_dir :=
@@ -1951,7 +1962,7 @@
# -----------------------------------------------------------------
# vendor debug ramdisk
# Combines vendor ramdisk files and debug ramdisk files to build the vendor debug ramdisk.
-INSTALLED_VENDOR_DEBUG_RAMDISK_TARGET := $(PRODUCT_OUT)/vendor-ramdisk-debug.cpio.gz
+INSTALLED_VENDOR_DEBUG_RAMDISK_TARGET := $(PRODUCT_OUT)/vendor-ramdisk-debug.cpio$(RAMDISK_EXT)
$(INSTALLED_VENDOR_DEBUG_RAMDISK_TARGET): DEBUG_RAMDISK_FILES := $(INTERNAL_DEBUG_RAMDISK_FILES)
$(INSTALLED_VENDOR_DEBUG_RAMDISK_TARGET): VENDOR_RAMDISK_DIR := $(TARGET_VENDOR_RAMDISK_OUT)
@@ -1965,14 +1976,14 @@
# $(PRODUCT_OUT)/vendor_debug_ramdisk.
$(INSTALLED_VENDOR_DEBUG_RAMDISK_TARGET): VENDOR_DEBUG_RAMDISK_DIR := $(PRODUCT_OUT)/vendor_debug_ramdisk
$(INSTALLED_VENDOR_DEBUG_RAMDISK_TARGET): $(INTERNAL_VENDOR_RAMDISK_TARGET) $(INSTALLED_DEBUG_RAMDISK_TARGET)
-$(INSTALLED_VENDOR_DEBUG_RAMDISK_TARGET): $(MKBOOTFS) $(INTERNAL_VENDOR_DEBUG_RAMDISK_FILES) | $(MINIGZIP)
+$(INSTALLED_VENDOR_DEBUG_RAMDISK_TARGET): $(MKBOOTFS) $(INTERNAL_VENDOR_DEBUG_RAMDISK_FILES) | $(COMPRESSION_COMMAND_DEPS)
$(call pretty,"Target vendor debug ram disk: $@")
mkdir -p $(TARGET_VENDOR_DEBUG_RAMDISK_OUT)
touch $(TARGET_VENDOR_DEBUG_RAMDISK_OUT)/force_debuggable
$(foreach debug_file,$(DEBUG_RAMDISK_FILES), \
cp -f $(debug_file) $(subst $(PRODUCT_OUT)/debug_ramdisk,$(PRODUCT_OUT)/vendor_debug_ramdisk,$(debug_file)) &&) true
rsync -a $(VENDOR_RAMDISK_DIR)/ $(VENDOR_DEBUG_RAMDISK_DIR)
- $(MKBOOTFS) -d $(TARGET_OUT) $(VENDOR_DEBUG_RAMDISK_DIR) | $(MINIGZIP) > $@
+ $(MKBOOTFS) -d $(TARGET_OUT) $(VENDOR_DEBUG_RAMDISK_DIR) | $(COMPRESSION_COMMAND) > $@
INSTALLED_FILES_FILE_VENDOR_DEBUG_RAMDISK := $(PRODUCT_OUT)/installed-files-vendor-ramdisk-debug.txt
INSTALLED_FILES_JSON_VENDOR_DEBUG_RAMDISK := $(INSTALLED_FILES_FILE_VENDOR_DEBUG_RAMDISK:.txt=.json)
@@ -2050,18 +2061,18 @@
endef
$(INSTALLED_TEST_HARNESS_RAMDISK_TARGET): $(INSTALLED_DEBUG_RAMDISK_TARGET)
-$(INSTALLED_TEST_HARNESS_RAMDISK_TARGET): $(MKBOOTFS) $(INTERNAL_TEST_HARNESS_RAMDISK_FILES) | $(MINIGZIP)
+$(INSTALLED_TEST_HARNESS_RAMDISK_TARGET): $(MKBOOTFS) $(INTERNAL_TEST_HARNESS_RAMDISK_FILES) | $(COMPRESSION_COMMAND_DEPS)
$(call pretty,"Target test harness ram disk: $@")
rsync -a $(TEST_HARNESS_RAMDISK_SYNC_DIR)/ $(TEST_HARNESS_RAMDISK_ROOT_DIR)
$(call append-test-harness-props,$(ADDITIONAL_TEST_HARNESS_PROPERTIES),$(TEST_HARNESS_PROP_TARGET))
- $(MKBOOTFS) -d $(TARGET_OUT) $(TEST_HARNESS_RAMDISK_ROOT_DIR) | $(MINIGZIP) > $@
+ $(MKBOOTFS) -d $(TARGET_OUT) $(TEST_HARNESS_RAMDISK_ROOT_DIR) | $(COMPRESSION_COMMAND) > $@
.PHONY: ramdisk_test_harness-nodeps
-ramdisk_test_harness-nodeps: $(MKBOOTFS) | $(MINIGZIP)
+ramdisk_test_harness-nodeps: $(MKBOOTFS) | $(COMPRESSION_COMMAND_DEPS)
echo "make $@: ignoring dependencies"
rsync -a $(TEST_HARNESS_RAMDISK_SYNC_DIR)/ $(TEST_HARNESS_RAMDISK_ROOT_DIR)
$(call append-test-harness-props,$(ADDITIONAL_TEST_HARNESS_PROPERTIES),$(TEST_HARNESS_PROP_TARGET))
- $(MKBOOTFS) -d $(TARGET_OUT) $(TEST_HARNESS_RAMDISK_ROOT_DIR) | $(MINIGZIP) > $(INSTALLED_TEST_HARNESS_RAMDISK_TARGET)
+ $(MKBOOTFS) -d $(TARGET_OUT) $(TEST_HARNESS_RAMDISK_ROOT_DIR) | $(COMPRESSION_COMMAND) > $(INSTALLED_TEST_HARNESS_RAMDISK_TARGET)
endif # BUILDING_RAMDISK_IMAGE