| kiwi_ | Hi, am trying to build a custom kernel (4.4.20).. for kdump, ie, a crash kernel | 02:24 |
|---|---|---|
| kiwi_ | Trouble is, am facing all kinds of issues when the kexec'd kernel boots - mainly to do with config and kernel cmdline params to pass | 02:25 |
| kiwi_ | Is there a specific kernel config file available for the Ubuntu crash kernel image? | 02:26 |
| kiwi_ | specifically, for Ubuntu 16.04 (xenial) | 02:28 |
| n0c | hey all, can someone refer me to a guide on the current, supported way of customizing a kernel on ubuntu? (xenial, but looking to get 4.10 kernel) preferably from a kernel-source package versus a git checkout? | 02:56 |
| n0c | well it looks like actually there isn't a source package beyond 4.4 so... git it is | 03:24 |
| lag | ppisati: Hi | 09:31 |
| lag | ppisati: ogra_ asked me to ping you | 09:31 |
| lag | ppisati: Could you tell me all the kernel config options required for Snappy please? | 09:31 |
| lag | ppisati: Is there a Wiki? | 09:31 |
| ogra_ | i think there was a script actually | 09:32 |
| ogra_ | lag, it could even be that these scripts are integrated into the snapcraft plugin ... https://github.com/snapcore/snapcraft/blob/master/demos/96boards-kernel/snapcraft.yaml has a demo snapcraft.yaml | 09:33 |
| ogra_ | (but i'm, not actually sure that checks for all config options, so better wait for ppisati's answer :) ) | 09:34 |
| lag | ogra_: Thanks | 09:34 |
| ppisati | lag: or here - https://github.com/snapcore/sample-kernels | 09:46 |
| ppisati | lag: look under kernel/config/snaps | 09:46 |
| ppisati | *kernel/config/snappy | 09:47 |
| ogra_ | ppisati, heh, you should really change CONFIG_SQUASHFS=m there | 09:52 |
| ogra_ | so people are not forced to put that into the initrd | 09:52 |
| ppisati | ogra_: yeah, i need to update the configs there | 10:03 |
| ppisati | ogra_: probably next week i'll push an update to the AA stuff, and i'll bundle the config chanfges | 10:03 |
| ogra_ | +1 | 10:03 |
| lag | ppisati: Thanks | 10:08 |
| caribou | Hello, I need to do a bissect on the 4.8 mainline kernel | 12:52 |
| caribou | what is the quickest way to only rebuild the vmlinuz bisected file w/o all the modules ? | 12:52 |
| caribou | mainline or our own kernel for that matter so either one is fine | 12:53 |
| rtg | caribou, CONFIG_MODULES=n ? | 12:54 |
| rtg | there is no split in the build between built-in and modules. its just the one call to the kernel makefile | 12:55 |
| caribou | rtg: cool, thanks | 12:55 |
| rtg | or, you could do a native build after generating the config, then 'make vmlinuz' | 12:56 |
| rtg | caribou, I often do something like this: | 12:56 |
| rtg | fdr clean prepare-generic | 12:56 |
| rtg | cp debian/build/build-generic/.config . | 12:56 |
| rtg | make oldconfig scripts prepare | 12:56 |
| rtg | make vmlinuz | 12:57 |
| caribou | rtg: great; will try that | 12:58 |
| caribou | rtg: something has changed in the /proc/vmcore elf representation which breaks makedumpfile (or at least make it spit tons of errors) | 12:58 |
| sajoupa | Hi, linux-image-generic-lts-yakkety fails ot install on xenial, which I believe is due to its absence from linux-lts-yakkety - 4.8.0-25.27~16.04.1 in https://launchpad.net/~canonical-kernel-team/+archive/ubuntu/ppa/+packages | 14:24 |
| sajoupa | ^ apw / rtg I've been told that you were the right guys to ping about it | 14:24 |
| rtg | sajoupa, how does it fail to install ? missing dependencies ? | 14:26 |
| sajoupa | rtg: yes | 14:26 |
| rtg | sajoupa, apw pointed out that I might have uploaded the meta package to the wrong pocket. | 14:26 |
| rtg | lemme check | 14:26 |
| sajoupa | https://pastebin.canonical.com/168001/ | 14:26 |
| rtg | indeed I did | 14:27 |
| rtg | sajoupa, I've uploaded a new version. Give it an hour or so to publish. | 14:31 |
| sajoupa | rtg: cool, thanks ! | 14:31 |
| sajoupa | rtg: installing fine now | 15:07 |
| rtg | sajoupa, ack | 15:08 |
| michael-vb | Hello there. Sorry if this is the wrong channel for "user questions", but I installed a 32-bit 4.8.0 daily kernel (tested with the 11 October and the 13 October one actually) and it hangs after grub. | 15:33 |
| michael-vb | Not a single line from the kernel printed, which makes me think that it is not properly loaded. The 4.8.0 non-git one boots fine. Does that bring anything to mind? Including problems between keyboard and chair... | 15:33 |
| michael-vb | Just to be clear, 4.8.0 works, 4.8.0-999 does not. | 15:34 |
| apw | michael-vb, we tend to have a more issues with the debug kernels for sure they are built in an automated way | 15:40 |
| michael-vb | Right. I was asking here because it looks like the kernel possibly isn't loaded at all, in which case there might be some easy way to solve it (for me). | 15:42 |
| apw | though the -999s are dalies if i remember the monenclature correctly, those have whatever random crack is in the aossicated tree that day | 15:43 |
| michael-vb | Of course, I am certainly not shocked, shocked to find one not working. | 15:43 |
| michael-vb | Or even two. | 15:44 |
| apw | depending on the day that could even be the middle of the merge window | 15:44 |
| michael-vb | But the description of a hang after grub but before the first kernel message is printed does not bring anything to mind? | 15:46 |
| michael-vb | Actually it does a mode set after selecting the kernel in grub and it hangs on an underscore cursor in the top-left corner. Does grub trigger that, or would it be the kernel at least starting to boot? | 15:48 |
| apw | michael-vb, when there is a failed boot grub the next boot hands off with the framebuffer blank with just a cursor | 15:51 |
| apw | so that could easily be cratering in the first bits of the kernel | 15:52 |
| michael-vb | Thanks. | 15:53 |
| nacc | query on the overlay stuff in y -- given that overlayfs is no longer recognized, should there be something that goes into /etc/schroot/chroot.d/ and post-install of an appropriate kernel ensures that it says overlay for each schroot? I guess that could be a sbuild change. Wasn't sure if there was already a bug for this | 16:30 |
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