Re: [PATCH] kernel/irq/proc: performance: replace seq_printf with seq_put_decimal_ull_width

David!

On Sun, Nov 03 2024 at 16:05, David Wang wrote:

$Subject: [PATCH] kernel/irq/proc: performance: ...

That's not a valid subsystem prefix.

> seq_printf is costy, when stress reading /proc/interrupts, profiling indicates
> seq_printf takes about ~47% of show_interrupts samples:

Also please follow the documentation for denoting functions in change
logs:

https://www.kernel.org/doc/html/latest/process/maintainer-tip.html#function-references-in-changelogs

>  arch/alpha/kernel/irq.c     |   8 +--
>  arch/arm/kernel/smp.c       |   4 +-
>  arch/arm64/kernel/smp.c     |   3 +-
>  arch/csky/kernel/smp.c      |   4 +-
>  arch/loongarch/kernel/smp.c |   2 +-
>  arch/parisc/kernel/irq.c    |  34 ++++++------
>  arch/powerpc/kernel/irq.c   |  44 ++++++++--------
>  arch/riscv/kernel/smp.c     |   3 +-
>  arch/sh/kernel/irq.c        |   4 +-
>  arch/sparc/kernel/irq_32.c  |  12 ++---
>  arch/sparc/kernel/irq_64.c  |   4 +-
>  arch/x86/kernel/irq.c       | 100 ++++++++++++++++++------------------
>  arch/xtensa/kernel/irq.c    |   2 +-
>  arch/xtensa/kernel/smp.c    |   4 +-
>  kernel/irq/proc.c           |   6 ++-

There is no dependency on these changes. So please split them up into
seperate patches for core and the individual architectures.

Thanks,

        tglx