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charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: buildroot-bounces@buildroot.org Sender: "buildroot" On Tue, Sep 03, 2024 at 11:10:44PM +0200, Arnout Vandecappelle wrote: > > > > Without udev (i.e. with the current buildroot rock5b_defconfig) > > none of these modules will be loaded. > > That is a very good reaosn to want eudev, indeed! The alternative is to > extend the linux config fragment to include all of these as builtins, but I > guess that's not even possible for hantro_vpu... > > > Then another question is whether we should use eudev or mdev. We currently > have 25 confgs that enable mdev and 30 that enable eudev. Some consistency > there would be nice as well! I remember that long ago, mdev did not support automatically loading kernel modules when hotplugging devices. See e.g.: https://wiki.gentoo.org/wiki/Mdev#Miscellaneous that still says: "mdev unlike udev does not support auto-modules loading." However, it appears that since: https://github.com/buildroot/buildroot/commit/07f46c2b6daec44a6176039c90be67e66c4c2e42 mdev does support automatic module loading. I changed from: BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_EUDEV=y to BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_MDEV=y in my defconfig, and did a: make clean && make rock5b_defconfig && make and: $ lsmod | wc -l 45 shows the same amout of loaded kernel modules both with udev and mdev. Plugging in a USB to Ethernet also loads the correct kernel module with mdev. Using mdev will also avoid "udev predictable NIC names", so I the patch in this series that adds net.ifnames=0 is no longer needed. I will resubmit a patch that enables MDEV and will simply drop the patch that adds net.ifnames=0 to the kernel command line. Kind regards, Niklas _______________________________________________ buildroot mailing list buildroot@buildroot.org https://lists.buildroot.org/mailman/listinfo/buildroot