=== mamarley_ is now known as mamarley
=== halves3 is now known as halves
[10:45] <th0> hi, joining the channel for the first time. Is it the place to discuss an issue that I have that seems related to a kernel bug?
[10:51] <tjaalton> yes
[10:55] <th0> tjaalton: thanks
[10:56] <th0> here is the code that is failing on a number of kernels, including 6.8.0-45 6.8.0-48 of ubuntu-22.04 and 24.04 : https://www.useless-ficus.net/~tho/timer.c
[10:56] <th0> it's related to a combination of posix timer (timer_create) and aio(7)
[10:57] <th0> I observe that SIGALRM is not delivered after a short time, randomly
[10:58] <th0> the code however behaves correctly on older kernels : 5.4.0-200 of ubuntu-20.04 as well as kernel on debian-12 (6.1.0-26) and some fedoras (6.10) as well
[10:59] <tjaalton> did you try mainline?
[11:00] <th0> nope, it would be a lot of effort for me right now, I know that's not the right answer though :)
[11:01] <tjaalton> well, you should figure out if it's a distro patch that breaks it
[11:01] <tjaalton> noone else would do it for you
[11:02] <th0> sure, I'm lacking a bit of knowledge to efficiently address this, so I was curious if that would immediately ring a bell to someone here
[13:13] <th0> tjaalton: I realized that by 'mainline' you were talking about the specific mainline tool, not the general 'mainline kernel' expression. I didn't know that tool.
[13:13] <th0> so I tried with mainline kernels. I have the issue with kernels from 6.4.0 to 6.11 included. i.e. the last kernel not showing the issue is 6.3.0
[13:15] <tjaalton> I meant mainline/upstream kernel
[13:15] <th0> ah ok, but that's what is included in the 'mainline' tool https://doc.ubuntu-fr.org/mainline , right?
[13:16] <tjaalton> I had no idea about that one
[13:17] <th0> ok, at least we both gain some information about this :)
[13:17] <th0> I think it fetches kernels from there https://kernel.ubuntu.com/mainline/
[13:17] <th0> and those are upstream vanilla linux, at least that what I understood
[13:19] <tjaalton> yes
[13:20] <tjaalton> so if you have the issue with mainline builds, but not fedora, it might be caused by some kernel config
[13:21] <th0> or maybe some fedora patches
[13:23] <tjaalton> doubt it
[13:24] <th0> but what kind of config would make SIGALRM randomnly vanish, that's a bit weird
[13:45] <tjaalton> beats me
[14:47] <th0> (thinking out loud: it could also be related to the gcc version used to compile the kernels)
=== sudip_ is now known as sudip
=== cascardo_ is now known as cascardo