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[PATCH] Add SysRq-Q to print timer_list debug info

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Add SysRq-Q to print pending timers and other timer info.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: john stultz <johnstul@us.ibm.com>
Cc: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Ingo Molnar 2007-02-16 01:28:16 -08:00 committed by Linus Torvalds
parent 289f480af8
commit 88ad0bf689
2 changed files with 16 additions and 1 deletions
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14
drivers/char/sysrq.c
View file

@ -36,6 +36,7 @@
#include <linux/workqueue.h>
#include <linux/kexec.h>
#include <linux/irq.h>
#include <linux/hrtimer.h>
#include <asm/ptrace.h>
#include <asm/irq_regs.h>
@ -158,6 +159,17 @@ static struct sysrq_key_op sysrq_sync_op = {
.enable_mask = SYSRQ_ENABLE_SYNC,
};
static void sysrq_handle_show_timers(int key, struct tty_struct *tty)
{
sysrq_timer_list_show();
}
static struct sysrq_key_op sysrq_show_timers_op = {
.handler = sysrq_handle_show_timers,
.help_msg = "show-all-timers(Q)",
.action_msg = "Show Pending Timers",
};
static void sysrq_handle_mountro(int key, struct tty_struct *tty)
{
emergency_remount();
@ -335,7 +347,7 @@ static struct sysrq_key_op *sysrq_key_table[36] = {
/* o: This will often be registered as 'Off' at init time */
NULL, /* o */
&sysrq_showregs_op, /* p */
NULL, /* q */
&sysrq_show_timers_op, /* q */
&sysrq_unraw_op, /* r */
&sysrq_sync_op, /* s */
&sysrq_showstate_op, /* t */

3
include/linux/hrtimer.h
View file

@ -316,6 +316,9 @@ extern unsigned long ktime_divns(const ktime_t kt, s64 div);
# define ktime_divns(kt, div) (unsigned long)((kt).tv64 / (div))
#endif
/* Show pending timers: */
extern void sysrq_timer_list_show(void);
/*
* Timer-statistics info:
*/