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dmarc=pass (p=quarantine dis=none) header.from=wdc.com X-Mailman-Original-Authentication-Results: smtp2.osuosl.org; dkim=pass (2048-bit key, unprotected) header.d=wdc.com header.i=@wdc.com header.a=rsa-sha256 header.s=dkim.wdc.com header.b=CeGFcsiO; dkim=pass (1024-bit key, unprotected) header.d=sharedspace.onmicrosoft.com header.i=@sharedspace.onmicrosoft.com header.a=rsa-sha256 header.s=selector2-sharedspace-onmicrosoft-com header.b=hydcop03 X-Mailman-Original-Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=wdc.com; Subject: Re: [Buildroot] [PATCH 3/5] configs/rock5b: enable eudev to enable automatic module loading X-BeenThere: buildroot@buildroot.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Discussion and development of buildroot List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Niklas Cassel via buildroot Reply-To: Niklas Cassel Cc: Niklas Cassel , Damien Le Moal , Kilian Zinnecker , Niklas Cassel via buildroot Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: buildroot-bounces@buildroot.org Sender: "buildroot" On Tue, Sep 03, 2024 at 09:26:11PM +0200, Thomas Petazzoni wrote: > On Mon, 2 Sep 2024 12:44:31 +0200 > Niklas Cassel via buildroot wrote: > > > From: Niklas Cassel > > > > The arm64 defconfig enables both the R8169 Ethernet driver and the > > PHY_ROCKCHIP_NANENG_COMBO_PHY PHY driver as modules. > > > > Enable udev so that these modules will get automatically loaded by udev > > after the rootfs is mounted from the SD card. > > > > This way, we do not need to build these modules as built-in, and we also > > get the benefit that any device plugged in to the PCIe slot will get > > automatically loaded. > > > > Signed-off-by: Niklas Cassel > > I'm not sure what we want to do here, especially when this ends up > needing net.ifnames=0 that you add in PATCH 4/5. > > We do have already a small number of defconfigs that enable eudev. So > far we only use net.ifnames=0 in 4 configurations. > > Basically, I'm trying to make sure we remain consistent and have a > policy that applies to all defconfigs rather than ad-hoc solutions that > are different for each and every defconfig. That's why I'm a bit > reluctant with applying your patches as-is because they only solve the > specific case of this defconfig, in a specific way, without creating a > clear rule that all defconfigs meeting a specific situation should > follow. (Replying with the email that I have subscribed to the list this time.) An alternative to specify net.ifnames=0 on the kernel command line (to disable udev predictable NIC names), is to create an empty file: /etc/udev/rules.d/80-net-name-slot.rules See: https://wiki.gentoo.org/wiki/Udev#Optional:_Disable_or_override_predictable_network_interface_naming I guess we could modify package/eudev/eudev.mk and package/eudev/Config.in to create a new BR2_PACKAGE_EUDEV_PREDICTABLE_NIC_NAMES Kconfig which we default to "not set". If BR2_PACKAGE_EUDEV_PREDICTABLE_NIC_NAMES is "not set", we install/touch /etc/udev/rules.d/80-net-name-slot.rules in the target rootfs. That would avoid the need for net.ifnames=0. We could also remove it for the existing boards that have it set. Any board that actually wants predictable NIC names can set the new BR2_PACKAGE_EUDEV_PREDICTABLE_NIC_NAMES Kconfig. Thoughts? Kind regards, Niklas _______________________________________________ buildroot mailing list buildroot@buildroot.org https://lists.buildroot.org/mailman/listinfo/buildroot