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package/systemd: Optionally disable hwdb

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By default hwdb files are installed in /usr/lib/udev/hwdb.d
Currently they take about ~5MB. After first boot, systemd-hwdb tool
parses them and creates a binary in /etc/udev/hwdb.bin, which takes
another ~6.5MB.

In case of initramfs images, hwdb parsing is done every boot. This adds
about 2-3 seconds to boot time in case of rootfs on SDHC class 10
card (benchmarked with am335x board). NAND boot takes even longer.

Add config option to disable hwdb in systemd, for smaller images and
better boot performance.

Signed-off-by: Marcin Niestroj <m.niestroj@grinn-global.com>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This commit is contained in:
Marcin Niestroj 2016-04-15 12:46:30 +02:00 committed by Thomas Petazzoni
parent 2abce7a7fa
commit 42f9d9e37b
2 changed files with 17 additions and 0 deletions
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11
package/systemd/Config.in
View File

@ -84,6 +84,17 @@ config BR2_PACKAGE_SYSTEMD_JOURNAL_GATEWAY
http://www.freedesktop.org/software/systemd/man/systemd-journal-gatewayd.service.html
config BR2_PACKAGE_SYSTEMD_HWDB
bool "enable hwdb installation"
default y
help
Enables hardware database installation to /usr/lib/udev/hwdb.d
Disabling this option improves first boot time (or every boot
time in case of initramfs images) and saves several MB space.
https://www.freedesktop.org/software/systemd/man/hwdb.html
config BR2_PACKAGE_SYSTEMD_BINFMT
bool "enable binfmt tool"
help

6
package/systemd/systemd.mk
View File

@ -129,6 +129,12 @@ else
SYSTEMD_CONF_OPTS += --disable-microhttpd
endif
ifeq ($(BR2_PACKAGE_SYSTEMD_HWDB),y)
SYSTEMD_CONF_OPTS += --enable-hwdb
else
SYSTEMD_CONF_OPTS += --disable-hwdb
endif
ifeq ($(BR2_PACKAGE_SYSTEMD_BINFMT),y)
SYSTEMD_CONF_OPTS += --enable-binfmt
else