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| author | Gabor Juhos <juhosg@openwrt.org> | 2012-11-29 17:37:15 +0000 |
|---|---|---|
| committer | Gabor Juhos <juhosg@openwrt.org> | 2012-11-29 17:37:15 +0000 |
| commit | d90e805fe607f6455a6ae8631e91c960ba4deaa2 (patch) | |
| tree | adf36b8284f1c148873ca7daced123aa2804b4ea | |
| parent | 44131bd78518a8635129f75cc794535196788fef (diff) | |
| download | upstream-d90e805fe607f6455a6ae8631e91c960ba4deaa2.tar.gz upstream-d90e805fe607f6455a6ae8631e91c960ba4deaa2.tar.bz2 upstream-d90e805fe607f6455a6ae8631e91c960ba4deaa2.zip | |
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>
SVN-Revision: 34408
| -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 |