Re: [RFC PATCH 4/5] irq_work: Trace calls to arch_irq_work_raise()
From: Steven Rostedt <rostedt@goodmis.org>
Date: 2022-10-08 19:35:16
Also in:
linux-alpha, linux-arm-kernel, linux-mips, linux-riscv, linux-s390, linux-sh, lkml, loongarch, sparclinux
On Fri, 7 Oct 2022 16:45:32 +0100 Valentin Schneider [off-list ref] wrote:
}
+static inline void irq_work_raise(void)
+{
+ if (arch_irq_work_has_interrupt())
+ trace_ipi_send_cpu(_RET_IP_, smp_processor_id());To save on the branch, let's make the above: if (trace_ipi_send_cpu_enabled() && arch_irq_work_has_interrupt()) As the "trace_*_enabled()" is a static branch that will make it a nop when the tracepoint is not enabled. -- Steve
+ + arch_irq_work_raise(); +} + /* Enqueue on current CPU, work must already be claimed and preempt disabled */