The patch titled
Add SysRq-Q to print timer_list debug info
has been added to the -mm tree. Its filename is
add-sysrq-q-to-print-timer_list-debug-info.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: Add SysRq-Q to print timer_list debug info
From: Ingo Molnar <mingo@xxxxxxx>
Add SysRq-Q to print pending timers and other timer info.
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: john stultz <johnstul@xxxxxxxxxx>
Cc: Roman Zippel <zippel@xxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
drivers/char/sysrq.c | 14 +++++++++++++-
include/linux/hrtimer.h | 3 +++
2 files changed, 16 insertions(+), 1 deletion(-)
diff -puN drivers/char/sysrq.c~add-sysrq-q-to-print-timer_list-debug-info drivers/char/sysrq.c
--- a/drivers/char/sysrq.c~add-sysrq-q-to-print-timer_list-debug-info
+++ a/drivers/char/sysrq.c
@@ -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>
@@ -159,6 +160,17 @@ 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();
@@ -336,7 +348,7 @@ static struct sysrq_key_op *sysrq_key_ta
/* 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 */
diff -puN include/linux/hrtimer.h~add-sysrq-q-to-print-timer_list-debug-info include/linux/hrtimer.h
--- a/include/linux/hrtimer.h~add-sysrq-q-to-print-timer_list-debug-info
+++ a/include/linux/hrtimer.h
@@ -316,6 +316,9 @@ extern unsigned long ktime_divns(const k
# define ktime_divns(kt, div) (unsigned long)((kt).tv64 / (div))
#endif
+/* Show pending timers: */
+extern void sysrq_timer_list_show(void);
+
/*
* Timer-statistics info:
*/
_
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