[PATCH] initramfs-live-boot-tiny: Create the initramfs-live-boot-tiny recipe

[PATCH] initramfs-live-boot-tiny: Create the initramfs-live-boot-tiny recipe

[Alejandro Hernandez]

The original initramfs-live-boot recipe RDEPENDS on udev, which is ok since
the init script relies some of its functionality on udevadm and such,
but on core-image-tiny-initramfs the init script simply drops to shell
after a basic setup, so udev is not needed.

This patch splits up an initramfs-live-boot-tiny recipe which does not
use udev, but uses busybox-mdev instead, eudev installed about 600
extra Kilobytes to core-image-tiny-initramfs userspace, by avoiding to
install eudev we achieve an even smaller footprint (almost 40% smaller).

Signed-off-by: Alejandro Hernandez <alejandro.hernandez@linux.intel.com>
---
 .../images/core-image-tiny-initramfs.bb             |  2 +-
 .../initrdscripts/initramfs-live-boot-tiny_1.0.bb   | 21 +++++++++++++++++++++
 2 files changed, 22 insertions(+), 1 deletion(-)
 create mode 100644 meta/recipes-core/initrdscripts/initramfs-live-boot-tiny_1.0.bb

diff --git a/meta/recipes-core/images/core-image-tiny-initramfs.bb b/meta/recipes-core/images/core-image-tiny-initramfs.bb
index 16995e6580a..51d08a0cd1c 100644
--- a/meta/recipes-core/images/core-image-tiny-initramfs.bb
+++ b/meta/recipes-core/images/core-image-tiny-initramfs.bb
@@ -5,7 +5,7 @@ first 'init' program more efficiently. core-image-tiny-initramfs doesn't \
 actually generate an image but rather generates boot and rootfs artifacts \
 that can subsequently be picked up by external image generation tools such as wic."
 
-PACKAGE_INSTALL = "initramfs-live-boot packagegroup-core-boot dropbear ${VIRTUAL-RUNTIME_base-utils} udev base-passwd ${ROOTFS_BOOTSTRAP_INSTALL}"
+PACKAGE_INSTALL = "initramfs-live-boot-tiny packagegroup-core-boot dropbear ${VIRTUAL-RUNTIME_base-utils} ${VIRTUAL-RUNTIME_dev_manager} base-passwd ${ROOTFS_BOOTSTRAP_INSTALL}"
 
 # Do not pollute the initrd image with rootfs features
 IMAGE_FEATURES = ""
diff --git a/meta/recipes-core/initrdscripts/initramfs-live-boot-tiny_1.0.bb b/meta/recipes-core/initrdscripts/initramfs-live-boot-tiny_1.0.bb
new file mode 100644
index 00000000000..7a9a8ecae26
--- /dev/null
+++ b/meta/recipes-core/initrdscripts/initramfs-live-boot-tiny_1.0.bb
@@ -0,0 +1,21 @@
+SUMMARY = "Live image init script"
+LICENSE = "MIT"
+LIC_FILES_CHKSUM = "file://${COREBASE}/meta/COPYING.MIT;md5=3da9cfbcb788c80a0384361b4de20420"
+DEPENDS = "virtual/kernel"
+RDEPENDS_${PN} = "busybox-mdev"
+SRC_URI = "file://init-live.sh"
+
+PR = "r12"
+
+S = "${WORKDIR}"
+
+do_install() {
+        install -m 0755 ${WORKDIR}/init-live.sh ${D}/init
+        install -d ${D}/dev
+        mknod -m 622 ${D}/dev/console c 5 1
+}
+
+FILES_${PN} += " /init /dev "
+
+# Due to kernel dependency
+PACKAGE_ARCH = "${MACHINE_ARCH}"
-- 
2.12.3

Re: [PATCH] initramfs-live-boot-tiny: Create the initramfs-live-boot-tiny recipe

[Otavio Salvador]

On Wed, Nov 22, 2017 at 3:09 PM, Alejandro Hernandez
<alejandro.hernandez@linux.intel.com> wrote:
> The original initramfs-live-boot recipe RDEPENDS on udev, which is ok since
> the init script relies some of its functionality on udevadm and such,
> but on core-image-tiny-initramfs the init script simply drops to shell
> after a basic setup, so udev is not needed.
>
> This patch splits up an initramfs-live-boot-tiny recipe which does not
> use udev, but uses busybox-mdev instead, eudev installed about 600
> extra Kilobytes to core-image-tiny-initramfs userspace, by avoiding to
> install eudev we achieve an even smaller footprint (almost 40% smaller).
>
> Signed-off-by: Alejandro Hernandez <alejandro.hernandez@linux.intel.com>

It'd be nice if you could migrate to initramfs-framework as it
provides mdev module and has part of this already done.

-- 
Otavio Salvador                             O.S. Systems
http://www.ossystems.com.br        http://code.ossystems.com.br
Mobile: +55 (53) 9981-7854            Mobile: +1 (347) 903-9750

Re: [PATCH] initramfs-live-boot-tiny: Create the initramfs-live-boot-tiny recipe

[Alejandro Hernandez]

Certainly, I can set that up as one of my ToDo features for this release.


On 11/22/2017 02:42 PM, Otavio Salvador wrote:
> On Wed, Nov 22, 2017 at 3:09 PM, Alejandro Hernandez
> <alejandro.hernandez@linux.intel.com> wrote:
>> The original initramfs-live-boot recipe RDEPENDS on udev, which is ok since
>> the init script relies some of its functionality on udevadm and such,
>> but on core-image-tiny-initramfs the init script simply drops to shell
>> after a basic setup, so udev is not needed.
>>
>> This patch splits up an initramfs-live-boot-tiny recipe which does not
>> use udev, but uses busybox-mdev instead, eudev installed about 600
>> extra Kilobytes to core-image-tiny-initramfs userspace, by avoiding to
>> install eudev we achieve an even smaller footprint (almost 40% smaller).
>>
>> Signed-off-by: Alejandro Hernandez <alejandro.hernandez@linux.intel.com>
> It'd be nice if you could migrate to initramfs-framework as it
> provides mdev module and has part of this already done.
>