diff options
| author | juhosg <juhosg@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2012-11-29 17:37:15 +0000 |
|---|---|---|
| committer | juhosg <juhosg@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2012-11-29 17:37:15 +0000 |
| commit | f80deda3fe5cc71bdb9ec710cb886ed02ba9b191 (patch) | |
| tree | caf9d6edbfa621a282bf9bb2bc04d8a7dd4294b9 | |
| parent | 917c6cb1183ed99985d126c1180a440c54ec2399 (diff) | |
build: Add TARGET_ROOTFS_RESERVED_PCT option to reduce wasted space
The genext2fs tool will 'reserve' 5% of the image size by default,
apparently by creating a huge lost+found directory. In fact it seemed to
be much more than 5% in practice — I saw an image with 8MiB used, and
recovered about 2MiB of it by deleting the 'empty' lost+found directory:
/dev/loop0 48377 8482 37438 19% /mnt/spare
# rmdir lost+found/
/dev/loop0 48377 6014 39906 14% /mnt/spare
This makes it configurable, but leaves it at the genext2fs default
of 5% for now. It should probably be changed to default to zero, but
that can be a separate patch.
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@34408 3c298f89-4303-0410-b956-a3cf2f4a3e73
| -rw-r--r-- | Config.in | 7 | ||||
| -rw-r--r-- | include/image.mk | 2 |
2 files changed, 8 insertions, 1 deletions
@@ -125,6 +125,13 @@ menu "Target Images" help Allows you to change the maximum number of inodes in the root filesystem + config TARGET_ROOTFS_RESERVED_PCT + int "Percentage of reserved blocks in root filesystem" + depends TARGET_ROOTFS_EXT4FS + default 5 + help + Allows you to change the percentage of reserved blocks in the root filesystem + endmenu menu "Global build settings" diff --git a/include/image.mk b/include/image.mk index 10850a6327..503115ddb0 100644 --- a/include/image.mk +++ b/include/image.mk @@ -124,7 +124,7 @@ ifneq ($(CONFIG_TARGET_ROOTFS_EXT4FS),) define Image/mkfs/ext4 # generate an ext2 fs - $(STAGING_DIR_HOST)/bin/genext2fs -U -b $(E2SIZE) -N $(CONFIG_TARGET_ROOTFS_MAXINODE) -d $(TARGET_DIR)/ $(KDIR)/root.ext4 + $(STAGING_DIR_HOST)/bin/genext2fs -U -b $(E2SIZE) -N $(CONFIG_TARGET_ROOTFS_MAXINODE) -d $(TARGET_DIR)/ $(KDIR)/root.ext4 -m $(CONFIG_TARGET_ROOTFS_RESERVED_PCT) # convert it to ext4 $(STAGING_DIR_HOST)/bin/tune2fs -O extents,uninit_bg,dir_index $(KDIR)/root.ext4 # fix it up |