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| quazimodo | holler | 09:11 |
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| quazimodo | ah discourse hey | 09:11 |
| quazimodo | so I was talking in #ubuntu & referred here; I'd like to apply the IOMMU ACS patch to the kernel so that I may reorganise my IOMMU groups for virtualisation purposes; my motherboard just doesn't want to give me usable groups no matter what UEFI settings I play with | 09:13 |
| quazimodo | I have a patch known to work with 6.3 but jammy is on 6.5, i guess i could just apply the patch & go but I am a littel fearful of doing something stupid, i don't know how much i don't know in this space | 09:13 |
| quazimodo | I'm a programmer but the last time I did C was > 8 years ago; i've inspected the source in Linus's repo (before i knew about the ubuntu kernel repos) and the patched code wont work directly, but that's fine i'm used to working in a git repo so no trouble there. Really the only thing i'm worried about is trying to build this & destroying something | 09:14 |
| quazimodo | are there any big warning bells? | 09:15 |
| nils_ | quazimodo, which patch is it? The one by Mark Weiman based on https://lkml.org/lkml/2013/5/30/513 ? | 09:23 |
| nils_ | quazimodo, do you want to submit the patch so Ubuntu integrates it or do you just want to comfortably run a kernel including the patch? If the latter you may want to check out xanmod, they offer a kernel including this patch as a deb repo, works fine with ubuntu. | 09:24 |
| quazimodo | nils_: comfortably run a kernel that's got the patch. Patch code is at https://github.com/benbaker76/linux-acs-override/blob/main/6.3/acso.patch . I'll check Xanmod | 09:36 |
| quazimodo | I don't think the patch can be submitted, in general this ACS patch is not a good idea for purpose built hardward - it appears very much to be a hack for homelabs | 09:36 |
| quazimodo | nils_: yes it does look very similar to that one by Mark Weiman | 09:37 |
| nils_ | quazimodo, there is a patch included in xanmod, latest non-edge kernel version for xanmod is 6.7 so you're getting a fresher kernel as well. | 09:38 |
| quazimodo | i don't typically use kernels not distributed by a well known organisation | 09:43 |
| quazimodo | i hadn't heard about xanmod | 09:43 |
| quazimodo | ahhh fun for me for some unknown bloody reason I didn't give my boot partition enough space :( | 09:49 |
| quazimodo | nils_: so xanmod kernel turns on good | 11:33 |
| quazimodo | tthanks for showing that to me | 11:33 |
| quazimodo | fantastic, IOMMU groups are usable | 11:47 |
| quazimodo | nils_: you're a legend | 11:47 |
| nils_ | quazimodo, hardly, all credit goes to whoever made those patches | 11:48 |
| quazimodo | indeed | 11:52 |
| quazimodo | it's a really big deal | 11:52 |
| quazimodo | though part of me is unsatisfied that i still have not figured out how to compile an ubuntu kernel with the patch applied | 11:52 |
| quazimodo | in fact, i don't even know why, but make would fail really early without sudo | 11:53 |
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