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main/postmarketos-mkinitfs: don't use uevent helper (MR 3351)

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Instead of using the uevent helper binary, mdev daemon listens for kernel
events using the netlink interface. Then the requirement of enabling
UEVENT_HELPER for pmOS kernels can be dropped, as it's use is discouraged.

From CONFIG_UEVENT_HELPER kernel config help:

> This should not be used today, because usual systems create many events
> at bootup or device discovery in a very short time frame. One forked
> process per event can create so many processes that it creates a high
> system load, or on smaller systems it is known to create out-of-memory
> situations during bootup.

Support for running mdev as a daemon was added in 2019 with commit [1].

From that same commit:

> Adds the -d option to run mdev in daemon mode handling hotplug events
> from the kernel like udev. If the system generates many hotplug events
> this mode of operation will consume less resources than registering
> mdev as hotplug helper or using the uevent applet.

[1] https://git.busybox.net/busybox/commit/?id=498cec202adbf69a7a72af5e204260682d614183
[ci:skip-build]: already built successfully in CI
This commit is contained in:
alikates 2022-08-10 14:56:23 +02:00 committed by Oliver Smith
parent 0b523f354b
commit e38db6e4de
No known key found for this signature in database
GPG key ID: 5AE7F5513E0885CB
2 changed files with 4 additions and 4 deletions
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4
main/postmarketos-mkinitfs/APKBUILD
View file

@ -2,7 +2,7 @@
# Co-Maintainer: Clayton Craft <clayton@craftyguy.net>
pkgname=postmarketos-mkinitfs
pkgver=1.5.1
pkgrel=0
pkgrel=1
pkgdesc="Tool to generate initramfs images for postmarketOS"
url="https://postmarketos.org"
depends="
@ -68,5 +68,5 @@ sha512sums="
d28802b17d7912a58d23c02fbdddfdb6f74489e712d61a59472f7f000a4429786f69ba2fca59d321c55c277ff79edb6f47c939a9e973b31f694aeca0167354ff postmarketos-mkinitfs-1.5.1.tar.gz
20f110337113e8de8999cf2a064a93fea36821d5c216bfa4ba46ec1f83825638262b92fd7be29eee0a85a54a108b7315a96cbe30da8ae4419f54c2ed53bb08c7 00-default.modules
ccdceaa710d97d6f57d8d66bfcbec448486d08083341712303f62123039f729229b88528308e411a308a2b90b81b60de89fe91143a6facbb11cbc9b4055eeaec init.sh
2abdea96aa66fcc709092ab97bfe5a99ecd7a6c959e344e0619a1c93ce28de21530379c498012a4d8e938013e7b490d3a00d5782b6d75c0987220ac3e7d66c92 init_functions.sh
260f7be8a199d5a3b64975441f7a3c62908b2e36b406341d858f90efd5d713e5559df1ecf465d7d61f5ebd009f61c34ba28e5db81f184ec8d857ceebffc985d9 init_functions.sh
"

4
main/postmarketos-mkinitfs/init_functions.sh
View file

@ -60,8 +60,8 @@ setup_firmware_path() {
}
setup_mdev() {
echo /sbin/mdev >/proc/sys/kernel/hotplug
mdev -s
# Start mdev daemon
mdev -d
# If udevd and udevadm are present in the initfs, coldplug all devices so that
# they can be used via libinput (e.g. by unl0kr). This is the same series of steps