Cannot change IRQ affinity

[ghost]

In kernel 6.12.x I get a lot of such warnings:

Cannot change IRQ XX affinity: Success
IRQ 60 affinity is now unmanaged
Cannot change IRQ XX affinity: Permission denied
IRQ 59 affinity is now unmanaged

Is this a problem?

[nhorman]

Its a bit of a misnomer, It means that for some reason you were unable to write to the kerenel affinity control file for that irq. causes include:

• failure to open the file
• failure to format the string properly for writing to the affinity file
• failure to close or flush the file
  Based on your output:

Cannot change IRQ XX affinity: Success

It would seem that somehow "xx" has been parsed from your /proc/interrupts file which seems very odd

[ghost]

Doing a search I found this: https://techpatterns.com/forums/about3097.html

It's exactly the same problem, is there a kernel patch to wait for then?

[nhorman]

seems like, though theres no indication of what the underlying problem is. regardless, if on kernel 6.12 opening an irq affinity file has started failing, that will likely be a kernel problem to fix