Arch Linux

glitsj16

Member

Registered: 2015-04-26

Posts: 126

linux-zen debugfs: File 'verbose' in directory 'sched' already present

As of linux-zen 6.4.1 I'm seeing this message in dmesg and on screen when booting:   

$ dmesg | grep debugfs
[    2.439348] debugfs: File 'verbose' in directory 'sched' already present!    

Obviously I can get it 'fixed' by adding the `debugfs=off` kernel parameter, but that creates other issues and just masks a potential underlying problem.

I've checked linux 6.4.1 and linux-zen 6.4 and they don't show the above message. After checking changes made to the current linux-zen 6.4.1 kernel I can't see anything directly related. But I'm fairly new to using linux-zen as my primary kernel on Arch Linux. I wonder if anyone can reproduce, in which case I'll be happy to open a bug report on the Arch bug tracker and/or github issue tracker.

Doc Robot

Member

From: Indiana

Registered: 2014-02-26

Posts: 13

Re: linux-zen debugfs: File 'verbose' in directory 'sched' already present

Yep, successfully reproduced (i.e. "it also happened to me") on my machine. Additionally, rolling back to the previous zen kernel version or booting linux 6.4.1 do not produce the message, as per your results.

Last edited by Doc Robot (2023-07-04 04:26:06)

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glitsj16

Member

Registered: 2015-04-26

Posts: 126

Re: linux-zen debugfs: File 'verbose' in directory 'sched' already present

Thank you for confirming. I've opened https://bugs.archlinux.org/task/78977.

glitsj16

Member

Registered: 2015-04-26

Posts: 126

Re: linux-zen debugfs: File 'verbose' in directory 'sched' already present

Fixed in linux-zen 6.4.2-1.

glitsj16

Member

Registered: 2015-04-26

Posts: 126

Re: linux-zen debugfs: File 'verbose' in directory 'sched' already present

UPDATE:

Seeing the exact same message again on linux-zen 6.5.4.zen2-1.

Requested re-opening https://bugs.archlinux.org/task/78977.

wildw1ng

Member

Registered: 2020-03-17

Posts: 12

Re: linux-zen debugfs: File 'verbose' in directory 'sched' already present

Can confirm:

[    0.000000] Linux version 6.5.4-zen2-1-zen (linux-zen@archlinux) (gcc (GCC) 13.2.1 20230801, GNU ld (GNU Binutils) 2.41.0) #1 ZEN SMP PREEMPT_DYNAMIC Thu, 21 Sep 2023 12:54:31 +0000
...
[    0.772855] debugfs: File 'verbose' in directory 'sched' already present!

loqs

Member

Registered: 2014-03-06

Posts: 18,786

Re: linux-zen debugfs: File 'verbose' in directory 'sched' already present

Thank you for raising it upstream [1] glitsj16.

[1] https://github.com/zen-kernel/zen-kerne … 1730747381