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authorIngo Molnar <mingo@elte.hu>2007-02-16 01:28:16 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-02-16 08:13:59 -0800
commit88ad0bf6890505cbd9ca1dbb79944a27b5c8697d (patch)
treee78711c47de9da92c8e4db8029f43542cecdf268
parent289f480af87e45f7a6de6ba9b4c061c2e259fe98 (diff)
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[PATCH] Add SysRq-Q to print timer_list debug info
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>
-rw-r--r--drivers/char/sysrq.c14
-rw-r--r--include/linux/hrtimer.h3
2 files changed, 16 insertions, 1 deletions
diff --git a/drivers/char/sysrq.c b/drivers/char/sysrq.c
index be73c80d699d..1d8c4ae61551 100644
--- a/drivers/char/sysrq.c
+++ b/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>
@@ -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 */
diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h
index 93b8757c1ea2..37f9279192a9 100644
--- a/include/linux/hrtimer.h
+++ b/include/linux/hrtimer.h
@@ -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:
*/