Don't sparse right-sized ext4 and erofs images.
When we introduced Dynamic Partitions, we stopped giving readonly
partitions fixed sizes. In addition we introduced deduplication for
ext4. These two factors greatly reduce the impact of sparse images,
since there aren't many fill blocks to optimize.
This patch disables sparsing for images that are rightsized and do not
explicitly specify extra reserved space. This makes the images a little
easier to work with from an engineering perspective. They no longer have
to be unsparsed to interact with any tooling. It also eases a potential
source of bugs, as b/184225422 is not reproducible with sparsing off.
On Pixel, the difference between the sparsed partitions and unsparsed is
12M (out of roughly 4G).
Bug: 198001223
Test: make, treehugger, make target-files-package
dynamic partitions are no longer sparse images
Change-Id: I74459f8abe74a15a24ba5a40cf701e6af2db8179
diff --git a/core/Makefile b/core/Makefile
index f2d7585..63ec1a6 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -1601,6 +1601,18 @@
endif # PRODUCT_USE_DYNAMIC_PARTITIONS
+# $(1) the partition variable component (eg SYSTEM)
+# $(2) the partition prefix in properties (eg system)
+# $(3) the image prop file
+# $(4) optional "other" size
+define add-sparse-flags-to-image-props
+$(eval _size := $(BOARD_$(1)IMAGE_PARTITION_SIZE))
+$(eval _reserved := $(BOARD_$(1)IMAGE_PARTITION_RESERVED_SIZE))
+$(eval _headroom := $(PRODUCT_$(1)_HEADROOM))
+$(if $(or $(_size), $(_reserved), $(_headroom), $(4)),,
+ $(hide) echo "$(2)_disable_sparse=true" >> $(3))
+endef
+
# $(1): the path of the output dictionary file
# $(2): a subset of "system vendor cache userdata product system_ext oem odm vendor_dlkm odm_dlkm"
# $(3): additional "key=value" pairs to append to the dictionary file.
@@ -1621,11 +1633,14 @@
$(if $(PRODUCT_SYSTEM_BASE_FS_PATH),$(hide) echo "system_base_fs_file=$(PRODUCT_SYSTEM_BASE_FS_PATH)" >> $(1))
$(if $(PRODUCT_SYSTEM_HEADROOM),$(hide) echo "system_headroom=$(PRODUCT_SYSTEM_HEADROOM)" >> $(1))
$(if $(BOARD_SYSTEMIMAGE_PARTITION_RESERVED_SIZE),$(hide) echo "system_reserved_size=$(BOARD_SYSTEMIMAGE_PARTITION_RESERVED_SIZE)" >> $(1))
+ $(call add-sparse-flags-to-image-props,SYSTEM,system,$(1))
$(hide) echo "system_selinux_fc=$(SELINUX_FC)" >> $(1)
$(hide) echo "building_system_image=$(BUILDING_SYSTEM_IMAGE)" >> $(1)
)
$(if $(filter $(2),system_other),\
$(hide) echo "building_system_other_image=$(BUILDING_SYSTEM_OTHER_IMAGE)" >> $(1)
+ $(if $(INTERNAL_SYSTEM_OTHER_PARTITION_SIZE),,
+ $(hide) echo "system_other_disable_sparse=true" >> $(1))
)
$(if $(filter $(2),userdata),\
$(if $(BOARD_USERDATAIMAGE_FILE_SYSTEM_TYPE),$(hide) echo "userdata_fs_type=$(BOARD_USERDATAIMAGE_FILE_SYSTEM_TYPE)" >> $(1))
@@ -1656,6 +1671,7 @@
$(if $(BOARD_VENDORIMAGE_SQUASHFS_DISABLE_4K_ALIGN),$(hide) echo "vendor_squashfs_disable_4k_align=$(BOARD_VENDORIMAGE_SQUASHFS_DISABLE_4K_ALIGN)" >> $(1))
$(if $(PRODUCT_VENDOR_BASE_FS_PATH),$(hide) echo "vendor_base_fs_file=$(PRODUCT_VENDOR_BASE_FS_PATH)" >> $(1))
$(if $(BOARD_VENDORIMAGE_PARTITION_RESERVED_SIZE),$(hide) echo "vendor_reserved_size=$(BOARD_VENDORIMAGE_PARTITION_RESERVED_SIZE)" >> $(1))
+ $(call add-sparse-flags-to-image-props,VENDOR,vendor,$(1))
$(hide) echo "vendor_selinux_fc=$(SELINUX_FC)" >> $(1)
$(hide) echo "building_vendor_image=$(BUILDING_VENDOR_IMAGE)" >> $(1)
)
@@ -1673,6 +1689,7 @@
$(if $(BOARD_PRODUCTIMAGE_SQUASHFS_DISABLE_4K_ALIGN),$(hide) echo "product_squashfs_disable_4k_align=$(BOARD_PRODUCTIMAGE_SQUASHFS_DISABLE_4K_ALIGN)" >> $(1))
$(if $(PRODUCT_PRODUCT_BASE_FS_PATH),$(hide) echo "product_base_fs_file=$(PRODUCT_PRODUCT_BASE_FS_PATH)" >> $(1))
$(if $(BOARD_PRODUCTIMAGE_PARTITION_RESERVED_SIZE),$(hide) echo "product_reserved_size=$(BOARD_PRODUCTIMAGE_PARTITION_RESERVED_SIZE)" >> $(1))
+ $(call add-sparse-flags-to-image-props,PRODUCT,product,$(1))
$(hide) echo "product_selinux_fc=$(SELINUX_FC)" >> $(1)
$(hide) echo "building_product_image=$(BUILDING_PRODUCT_IMAGE)" >> $(1)
)
@@ -1689,6 +1706,7 @@
$(if $(BOARD_SYSTEM_EXTIMAGE_SQUASHFS_BLOCK_SIZE),$(hide) echo "system_ext_squashfs_block_size=$(BOARD_SYSTEM_EXTIMAGE_SQUASHFS_BLOCK_SIZE)" >> $(1))
$(if $(BOARD_SYSTEM_EXTIMAGE_SQUASHFS_DISABLE_4K_ALIGN),$(hide) echo "system_ext_squashfs_disable_4k_align=$(BOARD_SYSTEM_EXTIMAGE_SQUASHFS_DISABLE_4K_ALIGN)" >> $(1))
$(if $(BOARD_SYSTEM_EXTIMAGE_PARTITION_RESERVED_SIZE),$(hide) echo "system_ext_reserved_size=$(BOARD_SYSTEM_EXTIMAGE_PARTITION_RESERVED_SIZE)" >> $(1))
+ $(call add-sparse-flags-to-image-props,SYSTEM_EXT,system_ext,$(1))
$(hide) echo "system_ext_selinux_fc=$(SELINUX_FC)" >> $(1)
$(hide) echo "building_system_ext_image=$(BUILDING_SYSTEM_EXT_IMAGE)" >> $(1)
)
@@ -1704,6 +1722,7 @@
$(if $(BOARD_ODMIMAGE_SQUASHFS_DISABLE_4K_ALIGN),$(hide) echo "odm_squashfs_disable_4k_align=$(BOARD_ODMIMAGE_SQUASHFS_DISABLE_4K_ALIGN)" >> $(1))
$(if $(PRODUCT_ODM_BASE_FS_PATH),$(hide) echo "odm_base_fs_file=$(PRODUCT_ODM_BASE_FS_PATH)" >> $(1))
$(if $(BOARD_ODMIMAGE_PARTITION_RESERVED_SIZE),$(hide) echo "odm_reserved_size=$(BOARD_ODMIMAGE_PARTITION_RESERVED_SIZE)" >> $(1))
+ $(call add-sparse-flags-to-image-props,ODM,odm,$(1))
$(hide) echo "odm_selinux_fc=$(SELINUX_FC)" >> $(1)
$(hide) echo "building_odm_image=$(BUILDING_ODM_IMAGE)" >> $(1)
)
@@ -1720,6 +1739,7 @@
$(if $(BOARD_VENDOR_DLKMIMAGE_SQUASHFS_BLOCK_SIZE),$(hide) echo "vendor_dlkm_squashfs_block_size=$(BOARD_VENDOR_DLKMIMAGE_SQUASHFS_BLOCK_SIZE)" >> $(1))
$(if $(BOARD_VENDOR_DLKMIMAGE_SQUASHFS_DISABLE_4K_ALIGN),$(hide) echo "vendor_dlkm_squashfs_disable_4k_align=$(BOARD_VENDOR_DLKMIMAGE_SQUASHFS_DISABLE_4K_ALIGN)" >> $(1))
$(if $(BOARD_VENDOR_DLKMIMAGE_PARTITION_RESERVED_SIZE),$(hide) echo "vendor_dlkm_reserved_size=$(BOARD_VENDOR_DLKMIMAGE_PARTITION_RESERVED_SIZE)" >> $(1))
+ $(call add-sparse-flags-to-image-props,VENDOR_DLKM,vendor_dlkm,$(1))
$(hide) echo "vendor_dlkm_selinux_fc=$(SELINUX_FC)" >> $(1)
$(hide) echo "building_vendor_dlkm_image=$(BUILDING_VENDOR_DLKM_IMAGE)" >> $(1)
)
@@ -1734,6 +1754,7 @@
$(if $(BOARD_ODM_DLKMIMAGE_SQUASHFS_BLOCK_SIZE),$(hide) echo "odm_dlkm_squashfs_block_size=$(BOARD_ODM_DLKMIMAGE_SQUASHFS_BLOCK_SIZE)" >> $(1))
$(if $(BOARD_ODM_DLKMIMAGE_SQUASHFS_DISABLE_4K_ALIGN),$(hide) echo "odm_dlkm_squashfs_disable_4k_align=$(BOARD_ODM_DLKMIMAGE_SQUASHFS_DISABLE_4K_ALIGN)" >> $(1))
$(if $(BOARD_ODM_DLKMIMAGE_PARTITION_RESERVED_SIZE),$(hide) echo "odm_dlkm_reserved_size=$(BOARD_ODM_DLKMIMAGE_PARTITION_RESERVED_SIZE)" >> $(1))
+ $(call add-sparse-flags-to-image-props,ODM_DLKM,odm_dlkm,$(1))
$(hide) echo "odm_dlkm_selinux_fc=$(SELINUX_FC)" >> $(1)
$(hide) echo "building_odm_dlkm_image=$(BUILDING_ODM_DLKM_IMAGE)" >> $(1)
)