| rafaeldtinoco | why the ddebs for linux-image are 15Kb only ? anyone knows ? | 13:10 |
|---|---|---|
| rafaeldtinoco | I see ddebs.ubuntu.com/dists was moved to dists.old | 13:11 |
| xnox | rafaeldtinoco: are you looking at the real ABI linux-image package; or just the meta which indeed is empty usually? | 13:30 |
| rafaeldtinoco | I was using info from Packages to generate BTF files for HWE kernels | 13:30 |
| rafaeldtinoco | https://github.com/aquasecurity/btfhub/tree/main/ubuntu/20.04/x86_64 | 13:30 |
| rafaeldtinoco | because Ubuntu Bionic and Focal don't enable BTF by default | 13:31 |
| rafaeldtinoco | script stopped working recently that is all I see #) | 13:31 |
| rafaeldtinoco | BTW updating dwarves for Bionic and Focal will allow you to enable embedded BTF into HWE kernels for both. That would save eBPF vendors a lot of trouble ^. | 13:32 |
| rafaeldtinoco | wget http://ddebs.ubuntu.com/dists/bionic-updates/main/binary-amd64/Packages -O bionic-updates -> now package points to a 15Kb ddeb file | 13:33 |
| rafaeldtinoco | https://github.com/aquasecurity/btfhub#ubuntu (about eBPF support topic) | 13:34 |
| xnox | rafaeldtinoco: i have backpowered dwarves to enable BTF by default | 14:25 |
| xnox | rafaeldtinoco: but SRU team is not accepting it =( | 14:25 |
| xnox | rafaeldtinoco: i'm not sure you are doing things right. | 14:26 |
| xnox | rafaeldtinoco: linux-image..... blah blah contains no debug symbols. but depends on unsigned ddebs package. you need unsigned linux image ddeb for ddebs | 14:26 |
| xnox | Package: linux-image-unsigned-5.0.0-61-generic-dbgsym | 14:27 |
| rafaeldtinoco | ah ok.. then it makes more sense.. I recently changed that | 14:27 |
| xnox | Installed-Size: 5749733 | 14:27 |
| rafaeldtinoco | because of a regex change. thanks xnox | 14:27 |
| rafaeldtinoco | sorry for the noise then | 14:27 |
| rafaeldtinoco | and rbasak ^ if you could help reconsidering dwarves backport | 14:27 |
| rafaeldtinoco | to enable BTF in HWE kernels for Bionic and Focal | 14:28 |
| rafaeldtinoco | that will open a new world to Ubuntu (regarding k8s and eBPF) | 14:28 |
| rafaeldtinoco | for already installed base at least =) | 14:28 |
| rafaeldtinoco | xnox: thx a lot | 14:28 |
| jdstrand | hi! fyi, I think that linux-firmware needs an update for i915 for hwe-5.11: https://bugs.launchpad.net/ubuntu/+source/linux-firmware/+bug/1889137/comments/12 | 14:42 |
| ubottu | Launchpad bug 1889137 in linux-firmware (Ubuntu) "HWE kernel is missing firmwares" [Undecided, Confirmed] | 14:42 |
| jdstrand | tjaalton: hey, fyi since you did the last linux-firmware update for focal ^ | 14:44 |
| tjaalton | jdstrand: right, those are harmless though | 14:58 |
| tjaalton | although the noise isn't nice | 14:59 |
| jdstrand | tjaalton: oh? it seemed scary since I use i915 | 15:19 |
| jdstrand | but ok | 15:19 |
| tjaalton | jdstrand: guc isn't used at all before 5.15, and even there it's only enabled for gen11 and up (Ice Lake ->) | 15:40 |
| tjaalton | huc is used for h.264 encoding | 15:41 |
| tjaalton | required, I mean. and that's not a common use case | 15:41 |
| tjaalton | hmm no, HEVC/H.265 | 15:43 |
| rbasak | rafaeldtinoco: the dwarves *SRU* is blocked on https://bugs.launchpad.net/ubuntu/+source/dwarves-dfsg/+bug/1912811/comments/7. Nothing else to reconsider I don't think? | 16:24 |
| ubottu | Launchpad bug 1912811 in dwarves-dfsg (Ubuntu Hirsute) "Update dwarves-dfsg in focal to version 1.21 from hirsute" [Undecided, Confirmed] | 16:24 |
| rbasak | rafaeldtinoco: separately I'd like to discuss the backports pocket as a better destination, and it would be good to discuss that before accepting the SRU. | 16:25 |
| rafaeldtinoco | rbasak: I'll think on that commit through. Safest way would be to have 'pahole' binary statically compiled added to old dwarves perhaps. | 16:25 |
| rafaeldtinoco | without changing dwarves entirely for the rest of the OS. | 16:25 |
| rbasak | rafaeldtinoco: maybe it would be easier to push into backports though? Any reason that is not acceptable? | 16:26 |
| rafaeldtinoco | rbasak: compiling kernel with -backports ? | 16:26 |
| rafaeldtinoco | that was my -1 on that idea (before) =( | 16:26 |
| rafaeldtinoco | and I did see the -backports thread indeed | 16:26 |
| rbasak | Oh, the kernel has to build-depend on this? | 16:26 |
| rafaeldtinoco | I still have to get back to it though | 16:26 |
| rafaeldtinoco | rbasak: yep, the pahole binary is used to play with DWARVES/BTF on kernel generation (kernel build-deps on dwarves and it is old for HWE builds) | 16:27 |
| rbasak | Ah | 16:27 |
| rbasak | OK, so SRU then, but that means even more care needs taking! | 16:27 |
| jdstrand | tjaalton: ack, thanks! | 16:27 |
| rbasak | And, does it mean we need to SRU verify against a rebuilt kernel? | 16:27 |
| rafaeldtinoco | rbasak: are you super -1 on having a newer static pahole (being compiled together with old dwarves source) added to the binary pkg ? | 16:27 |
| rafaeldtinoco | the only change to final package would be a static binary added (that kernel could use if present) | 16:28 |
| rafaeldtinoco | and the delta would be to add the pahole binary generation logic | 16:28 |
| rbasak | rafaeldtinoco: definitely not -1 right now. I don't fully understand the situation so cannot have an opinion yet. | 16:28 |
| rafaeldtinoco | ok | 16:28 |
| rafaeldtinoco | Ill work on it and describe it fully in the bug. | 16:28 |
| rbasak | Thanks! | 16:28 |
| rbasak | If backports cannot work then I'm open to an SRU still. | 16:28 |
| rafaeldtinoco | and about -backports, will get back to the thread soonish. Sorry on the dealys | 16:28 |
| rafaeldtinoco | rbasak: that will enable BTF for Bionic and Focal | 16:29 |
| rafaeldtinoco | and that is a key competitive feature against centos/fedora/alma | 16:29 |
| rafaeldtinoco | fyio | 16:29 |
| rbasak | I just thought backports would be easier, but if that can't work, then it's certainly worth considering the SRU. | 16:29 |
| rafaeldtinoco | nice! tku! | 16:29 |
| === mhcerri0 is now known as mhcerri | ||
| xnox | rbasak: backports no good, as it needs to be kernel's build-dep. | 17:08 |
| xnox | rbasak: nothing but the kernel uses those packages, and kernels have stop using them, because they are too old. | 17:08 |
| rbasak | xnox: lots of good explanations to go in the bug please, thanks :) | 17:24 |
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