On Wed, Jan 23, 2008 at 11:02:55AM -0500, Steven Rostedt wrote:
> This patch adds latency tracing for critical timings
> (how long interrupts are disabled for).
>
> "irqsoff" is added to /debugfs/tracing/available_tracers
>
> Index: linux-mcount.git/kernel/lockdep.c
> ===================================================================
> --- linux-mcount.git.orig/kernel/lockdep.c 2008-01-23 10:26:11.000000000
> -0500
> +++ linux-mcount.git/kernel/lockdep.c 2008-01-23 10:27:53.000000000 -0500
> @@ -39,6 +39,7 @@
> #include <linux/irqflags.h>
> #include <linux/utsname.h>
> #include <linux/hash.h>
> +#include <linux/mcount.h>
>
> #include <asm/sections.h>
>
> @@ -2009,7 +2010,7 @@ void early_boot_irqs_on(void)
> /*
> * Hardirqs will be enabled:
> */
> -void trace_hardirqs_on(void)
> +void notrace trace_hardirqs_on_caller(unsigned long a0)
> {
> struct task_struct *curr = current;
> unsigned long ip;
> @@ -2050,14 +2051,24 @@ void trace_hardirqs_on(void)
> curr->hardirq_enable_ip = ip;
> curr->hardirq_enable_event = ++curr->irq_events;
> debug_atomic_inc(&hardirqs_on_events);
> + time_hardirqs_on(CALLER_ADDR0, a0);
> }
> +EXPORT_SYMBOL(trace_hardirqs_on_caller);
>
> +void notrace trace_hardirqs_on(void) {
> + trace_hardirqs_on_caller(CALLER_ADDR0);
> +}
> EXPORT_SYMBOL(trace_hardirqs_on);
>
vvvvvvvvvvvvvvvv
> +void notrace trace_hardirqs_off(void) {
> + trace_hardirqs_off_caller(CALLER_ADDR0);
> +}
> +EXPORT_SYMBOL(trace_hardirqs_off);
> +
^^^^^^^^^^^^^^^^
> /*
> * Hardirqs were disabled:
> */
> -void trace_hardirqs_off(void)
> +void notrace trace_hardirqs_off_caller(unsigned long a0)
> {
> struct task_struct *curr = current;
>
> @@ -2075,10 +2086,15 @@ void trace_hardirqs_off(void)
> curr->hardirq_disable_ip = _RET_IP_;
> curr->hardirq_disable_event = ++curr->irq_events;
> debug_atomic_inc(&hardirqs_off_events);
> + time_hardirqs_off(CALLER_ADDR0, a0);
> } else
> debug_atomic_inc(&redundant_hardirqs_off);
> }
>
> +void notrace trace_hardirqs_off(void) {
> + trace_hardirqs_off_caller(CALLER_ADDR0);
> +}
> +
> EXPORT_SYMBOL(trace_hardirqs_off);
>
Bah, I didn't refresh quilt! I'll update the website with a -v5a with
this fix.
-- Steve
> /*
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
