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Author Topic: Problems with kernel 5.12.4-1  (Read 619 times)

Offline Pip

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Problems with kernel 5.12.4-1
« 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.

Offline Carnophage

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Re: Problems with kernel 5.12.4-1
« Reply #1 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.

Offline dibl

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Re: Problems with kernel 5.12.4-1
« Reply #2 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.
Asus ROG STRIX X299-E, Core i7-7740X, Nvidia GTX-1060, dual monitors, SSD 860 EVO, 2@WD2003FZEX in BTRFS

Offline Carnophage

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Re: Problems with kernel 5.12.4-1
« Reply #3 on: 2021/05/16, 10:57:39 »
Quote
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.

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

Offline towo

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Re: Problems with kernel 5.12.4-1
« Reply #4 on: 2021/05/16, 11:51:53 »
I have added the patch in linux-siduction_5.12-4.1 (5.12.4-2).
Ich gehe nicht zum Karneval, ich verleihe nur manchmal mein Gesicht.

Offline Pip

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Re: Problems with kernel 5.12.4-1
« Reply #5 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.

Offline Pip

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Re: Problems with kernel 5.12.4-1
« Reply #6 on: 2021/05/16, 13:23:09 »
Thanks, towo, I'll give it a go.

Offline dibl

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Re: Problems with kernel 5.12.4-1
« Reply #7 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.
Asus ROG STRIX X299-E, Core i7-7740X, Nvidia GTX-1060, dual monitors, SSD 860 EVO, 2@WD2003FZEX in BTRFS

Offline Pip

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Re: Problems with kernel 5.12.4-1
« Reply #8 on: 2021/05/16, 13:48:20 »
My system's been up twenty minutes now without the creeping load. Seems good. Thanks again, towo.