Siduction Forum

Siduction Forum => Upgrade Warnings => Topic started by: Pip on 2021/05/15, 16:30:21

Title: Problems with kernel 5.12.4-1
Post by: Pip on 2021/05/15, 16:30:21

It looks like there are some kworker issues with the kernel, at least on my set-up. Load average takes off after a while though there doesn't seem to be any process taking up CPU or memory and the wait time is pretty low.
It might just be me.

Title: Re: Problems with kernel 5.12.4-1
Post by: Carnophage on 2021/05/15, 17:26:30

I didn't encounter those, but I didn't run long, because of screen flickering issues (just like those reported in arch forum: https://bbs.archlinux.org/viewtopic.php?id=266091

It's been a while since I had to compile the kernel to check/fix something :D As I understand https://git.archlinux.org/linux.git/commit/?h=v5.12.3-arch2&id=d290a24cb45e73e4f8d2700d5f47c2132d066fe2 was the "fix" in Arch.

Title: Re: Problems with kernel 5.12.4-1
Post by: dibl on 2021/05/15, 22:13:28

Code: [Select]

don@dibl-patience:/$ uname -a
Linux dibl-patience 5.12.4-1-siduction-amd64 #1 SMP PREEMPT siduction 5.12-4 (2021-05-14) x86_64 GNU/Linux

don@dibl-patience:/$ uptime
 16:11:20 up 10:07,  3 users,  load average: 0.04, 0.08, 0.15

Code: [Select]

top shows nothing unusual going on with the cpu.

Title: Re: Problems with kernel 5.12.4-1
Post by: Carnophage on 2021/05/16, 10:57:39

Quote

It's been a while since I had to compile the kernel to check/fix something (http://forum.siduction.org/Smileys/default/cheesy.gif) As I understand https://git.archlinux.org/linux.git/commit/?h=v5.12.3-arch2&id=d290a24cb45e73e4f8d2700d5f47c2132d066fe2 (https://git.archlinux.org/linux.git/commit/?h=v5.12.3-arch2&id=d290a24cb45e73e4f8d2700d5f47c2132d066fe2) was the "fix" in Arch.

Looks like it indeed works for my X1 Carbon 3rd gen too.

@towo, is there a possibility to include this patch in siduction kernel?
@Pip, sorry if I'm hijacking the thread, do You by chance use btrfs? https://forum.manjaro.org/t/5-12-1-2-kworker-events-unbound-eats-100-single-thread-cpu/65891 (https://forum.manjaro.org/t/5-12-1-2-kworker-events-unbound-eats-100-single-thread-cpu/65891)

Title: Re: Problems with kernel 5.12.4-1
Post by: towo on 2021/05/16, 11:51:53

I have added the patch in linux-siduction_5.12-4.1 (5.12.4-2).

Title: Re: Problems with kernel 5.12.4-1
Post by: Pip on 2021/05/16, 13:22:28

Hijack away!
No, I don't use btrfs, I've only got ext4 in place.
I've gone back to 5.11.20-1 and everything is working fine on my Quad Core Intel Core i7-6700. I don't think I've anything unusual on my set up other than using 4k output on my NVIDIA GK104 [GeForce GTX 770]. Since dibl isn't having issues, it seems there isn't a general fault and I'll have to uncover my issues on the machine that is experiencing them. One of my machines. After dibl's news, I installed on a couple of laptops and they don't seem to be having issues.

Title: Re: Problems with kernel 5.12.4-1
Post by: Pip on 2021/05/16, 13:23:09

Thanks, towo, I'll give it a go.

Title: Re: Problems with kernel 5.12.4-1
Post by: dibl on 2021/05/16, 13:32:03

Interesting. I have a dual-drive BTRFS filesystem for my data, and top shows no such problem with excessive kworker processes. However, I'm going to upgrade to the new kernel now, anyway.

Title: Re: Problems with kernel 5.12.4-1
Post by: Pip on 2021/05/16, 13:48:20

My system's been up twenty minutes now without the creeping load. Seems good. Thanks again, towo.