On Sunday, January 23, 2022 8:14:13 PM EST you wrote: > On Sun, 2022-01-23 at 09:40 -0500, gene heskett wrote: > > On Friday, December 24, 2021 9:16:57 PM EST you wrote: > > > On Thu, 2021-12-23 at 17:13 +0100, Sebastian Andrzej Siewior wrote: > > > > Dear RT folks! > > > > > > > > I'm pleased to announce the v5.16-rc6-rt12 patch set. > > > > > > > Changes since v5.16-rc6-rt11: > > > ... > > > > > > > - The "Memory controller" (CONFIG_MEMCG) can be enabled again. > > > > > > FWIW, LTP testcases pass on rpi4 and x86_64 boxen with no gripeage. > > > Full LTP with maximally bloated config was as uninteresting as one > > > can > > > hope for. > > > . > > > > Unforch and after many try's, I can't get it to reboot when > > installed, > > sorta, on an rpi4b. > > > > I say sorta, because no matter how many times I rebuild it, the build > > does not generate an arch/arm/boot/dts/overlays directory. The build > > itself is error free. > > > > The raspi kernel build instructions from their somewhat dated wiki > > also say to use the bcm2711_defconfig, but it does not now exist in > > a git clone. And a hwinfo of the rpi4b says I should use the > > bcm2835_defconfig for a starter .config. > > > > Is there any hope of making this work? > > Sure. Given bcm2711_defconfig is missing, sounds like you're trying to > build patched up kernel.org source. You can do that, works fine for > me, and I know jack diddly spit about cute little arm gizmos ;-) but > you're better off patching up source from... > > git clone https://github.com/raspberrypi/linux.git > > ...instead, which has a large pile of not yet upstreamed rpi patches. > Just checkout the rpi-5.16.y branch and apply the 5.16-rt patch set. > There you'll find that bcm2711_defconfig you were looking for. > > I build on my desktop box, rpi4 being every bit as fast as you'd expect > something that dinky to be, then nfs mount from rpi4 and sudo make > modules_install dtbs_install install. Edit /boot/config.txt, reboot, > and presto, you too will be ready to have any unrealistic x86_64 based > expectations you may have thoroughly dashed by cyclictest numbers :) And after the reboot, its still running the old kernel, so I must have edited config.txt wrong. Or the bare install miss-fired. IDK. And I can't ssh into it, sshd isn't running, and raspi-config has disappeared. That is normally where I start it once and forever. But I did find it in the gui menu. Started ssh, rebooted. ssh -y pi@rpi4, figure out the keys, log in, mkdir /mnt/sdb1 mount it, cp arm.src/apt-stf/linux/arch/arm/boot/zImage to boot/kernel7l- rt, edit /boot/config.txt to spec that name, reboot. log back in and a uname -a now says: Linux rpi4 5.16.2-rt19-rt19-v7l+ #3 SMP PREEMPT_RT Tue Jan 25 01:14:16 EST 2022 armv7l GNU/Linux I think I've hit a lick! So thank you very much Mike. Now to do it 2x more for Dave Engvall, 3000 miles west of me, out in the puckerbrush of Wash state. He has a cinci mill he wants to run with a rpi4b. But first, since this is my card, not his, recover the /home/pi/linuxcnc directory and install the 4 debs of master I built earlier this after noon and see how linuxcnc runs now. At this point my grin is so wide I'll need a bigger brain bucket to go riding... > -Mike > . Cheers, Gene Heskett. -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author, 1940) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene>
