| TRACE_IRQ_HANDLER_EN(9) | IRQ | TRACE_IRQ_HANDLER_EN(9) |
NAME¶
trace_irq_handler_entry - called immediately before the irq action handler
SYNOPSIS¶
void trace_irq_handler_entry(int irq, struct irqaction * action);
ARGUMENTS¶
irq
irq number
action
pointer to struct irqaction
DESCRIPTION¶
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.
AUTHOR¶
Jason Baron <jbaron@redhat.com>
Author.
COPYRIGHT¶
| May 2024 | Kernel Hackers Manual 2.6. |