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lockup_detector: Touch_softlockup cleanups and softlockup_tick removal 

Just some code cleanup to make touch_softlockup clearer and remove the
softlockup_tick function as it is no longer needed.

Also remove the /proc softlockup_thres call as it has been changed to
watchdog_thres.

Signed-off-by: Don Zickus <dzickus@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Eric Paris <eparis@redhat.com>
Cc: Randy Dunlap <randy.dunlap@oracle.com>
LKML-Reference: <1273266711-18706-3-git-send-email-dzickus@redhat.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
This commit is contained in:
Don Zickus 2010-05-07 17:11:45 -04:00 committed by Frederic Weisbecker
parent 58687acba5
commit 332fbdbca3
4 changed files with 6 additions and 55 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
include/linux/sched.h
View File

@ -312,19 +312,15 @@ extern void scheduler_tick(void);
extern void sched_show_task(struct task_struct *p);
#ifdef CONFIG_DETECT_SOFTLOCKUP
extern void softlockup_tick(void);
extern void touch_softlockup_watchdog(void);
extern void touch_softlockup_watchdog_sync(void);
extern void touch_all_softlockup_watchdogs(void);
extern int proc_dosoftlockup_thresh(struct ctl_table *table, int write,
void __user *buffer,
size_t *lenp, loff_t *ppos);
extern int proc_dowatchdog_thresh(struct ctl_table *table, int write,
void __user *buffer,
size_t *lenp, loff_t *ppos);
extern unsigned int softlockup_panic;
extern int softlockup_thresh;
#else
static inline void softlockup_tick(void)
{
}
static inline void touch_softlockup_watchdog(void)
{
}
@ -346,12 +342,6 @@ extern int proc_dohung_task_timeout_secs(struct ctl_table *table, int write,
size_t *lenp, loff_t *ppos);
#endif
#ifdef CONFIG_LOCKUP_DETECTOR
extern int proc_dowatchdog_thresh(struct ctl_table *table, int write,
void __user *buffer,
size_t *lenp, loff_t *ppos);
#endif
/* Attach to any functions which should be ignored in wchan output. */
#define __sched __attribute__((__section__(".sched.text")))

9
kernel/sysctl.c
View File

@ -817,15 +817,6 @@ static struct ctl_table kern_table[] = {
.extra1 = &zero,
.extra2 = &one,
},
{
.procname = "softlockup_thresh",
.data = &softlockup_thresh,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dosoftlockup_thresh,
.extra1 = &neg_one,
.extra2 = &sixty,
},
#endif
#ifdef CONFIG_DETECT_HUNG_TASK
{

1
kernel/timer.c
View File

@ -1225,7 +1225,6 @@ void run_local_timers(void)
{
hrtimer_run_queues();
raise_softirq(TIMER_SOFTIRQ);
softlockup_tick();
}
/*

35
kernel/watchdog.c
View File

@ -119,13 +119,12 @@ static void __touch_watchdog(void)
__get_cpu_var(watchdog_touch_ts) = get_timestamp(this_cpu);
}
void touch_watchdog(void)
void touch_softlockup_watchdog(void)
{
__get_cpu_var(watchdog_touch_ts) = 0;
}
EXPORT_SYMBOL(touch_watchdog);
void touch_all_watchdog(void)
void touch_all_softlockup_watchdogs(void)
{
int cpu;
@ -140,35 +139,16 @@ void touch_all_watchdog(void)
void touch_nmi_watchdog(void)
{
touch_watchdog();
touch_softlockup_watchdog();
}
EXPORT_SYMBOL(touch_nmi_watchdog);
void touch_all_nmi_watchdog(void)
{
touch_all_watchdog();
}
void touch_softlockup_watchdog(void)
{
touch_watchdog();
}
void touch_all_softlockup_watchdogs(void)
{
touch_all_watchdog();
}
void touch_softlockup_watchdog_sync(void)
{
__raw_get_cpu_var(softlockup_touch_sync) = true;
__raw_get_cpu_var(watchdog_touch_ts) = 0;
}
void softlockup_tick(void)
{
}
#ifdef CONFIG_PERF_EVENTS_NMI
/* watchdog detector functions */
static int is_hardlockup(int cpu)
@ -522,15 +502,6 @@ int proc_dowatchdog_thresh(struct ctl_table *table, int write,
{
return proc_dointvec_minmax(table, write, buffer, lenp, ppos);
}
/* stub functions */
int proc_dosoftlockup_thresh(struct ctl_table *table, int write,
void __user *buffer,
size_t *lenp, loff_t *ppos)
{
return proc_dowatchdog_thresh(table, write, buffer, lenp, ppos);
}
/* end of stub functions */
#endif /* CONFIG_SYSCTL */