x86/irq: Suppress unlikely interrupt stats by default

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Unlikely interrupt counters like the spurious vector and the synthetic APIC
ICR read retry show up in /proc/interrupts with all counts 0 most of the
time.

As these are events which should never happen, suppress them by default and
enable them for output when they actually happen.

This requires a seperate bitmap as the description array is marked
__ro_after_init. With that bitmap in place it becomes RO data.

Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Tested-by: Michael Kelley <mhklinux@outlook.com>
Reviewed-by: Radu Rendec <radu@rendec.net>
Link: https://patch.msgid.link/20260517194931.276486277@kernel.org

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This commit is contained in:

Thomas Gleixner 2026-05-17 22:01:54 +02:00

parent 2b57c69917

commit 8713f2e596

4 changed files with 31 additions and 12 deletions

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1

arch/x86/include/asm/hardirq.h

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2

arch/x86/kernel/apic/apic.c

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2

arch/x86/kernel/apic/ipi.c

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38

arch/x86/kernel/irq.c

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