On 2018-05-20, Geert Stappers wrote: > On Sun, May 20, 2018 at 09:15:38PM +0200, Karsten Merker wrote: >> >> When looking at the defconfigs for several of these systems, I >> see e.g. CONFIG_BOOTARGS settings that don't really match what I >> would expect for systems using config_distro_bootcmd.h. >> Three random examples: >> >> - r8a77995_draak_defconfig: >> CONFIG_BOOTARGS="console=ttySC0,115200 rw root=/dev/nfs >> nfsroot=192.168.0.1:/export/rfs ip=192.168.0.20" >> >> - ls1088ardb_sdcard_qspi_defconfig: >> CONFIG_BOOTARGS="console=ttyS0,115200 root=/dev/ram0 >> earlycon=uart8250,mmio,0x21c0500 ramdisk_size=0x3000000 >> default_hugepagesz=2m hugepagesz=2m hugepages=256" >> >> - hikey_defconfig: >> CONFIG_BOOTARGS="console=ttyAMA0,115200n8 root=/dev/mmcblk0p9 rw" >> > > Euh, an example of a "known good" CONFIG_BOOTARGS
Unfortunately, it's much easier to identify "likely bad" CONFIG_BOOTARGS than it is to identify "known good". Anything that hard-codes root= is likely to interfere with booting from an arbitrary root device, which is one of the things the distro_bootcmd specification allows. This is part of why I have uneasy feelings about globally enabling large batches of boards, instead of selectively enabling individual boards that have been tested and known to work with a particular flash-kernel + u-boot + kernel configuration. If you want to enable arbitrary boards without any testing, it would be much simpler to do that programmatically, rather than maintaining all.db in flash-kernel; parse all the .dtb files in the installed linux-image-* packages, and compare against /proc/device-tree/model ... might not be particularily fast... but certainly doable. Could use dpkg triggers or a kernel postinst hook or something, and update the database on installation of relevent packages. live well, vagrant
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