Re: [PATCH v2 15/17] arm64: Remove custom IRQ stat accounting

From: Marc Zyngier
Date: Fri Jun 26 2020 - 07:58:41 EST


On 2020-06-25 19:26, Valentin Schneider wrote:
On 24/06/20 20:58, Marc Zyngier wrote:
@@ -801,26 +802,15 @@ void show_ipi_list(struct seq_file *p, int prec)
unsigned int cpu, i;

for (i = 0; i < NR_IPI; i++) {
+ unsigned int irq = irq_desc_get_irq(ipi_desc[i]);
seq_printf(p, "%*s%u:%s", prec - 1, "IPI", i,
prec >= 4 ? " " : "");
for_each_online_cpu(cpu)
- seq_printf(p, "%10u ",
- __get_irq_stat(cpu, ipi_irqs[i]));
+ seq_printf(p, "%10u ", kstat_irqs_cpu(irq, cpu));
seq_printf(p, " %s\n", ipi_types[i]);

How attached are we to that custom IPI printout? AIUI we *could* give them
a "prettier" name in request_percpu_irq() and let the standard procfs
printout take the wheel.

I wish. Unfortunately, /proc/interrupts is likely to be considered ABI,
and I'm really worried to change this (see what happened last time we
tried to update /proc/cpuinfo to be less braindead...).

M.
--
Jazz is not dead. It just smells funny...