trace_irq_handler_entry9
Called immediately before the irq action handler
Usage
void trace_irq_handler_entry(int irq, struct irqaction * action);
Arguments
irq
irq number
action
pointer to struct irqaction
Overview
The struct irqaction pointed to by action contains various information about the handler, including the device name, action->name, and the device id, action->dev_id. When used in conjunction with the irq_handler_exit tracepoint, we can figure out irq handler latencies.
Releases
4 releases since Debian 6.0 (Squeeze); the text changed 3 times.