---

yaml --- r: 205388 b: refs/heads/master c: 58687ac h: refs/heads/master v: v3
git-mirror · May 12, 2010 · 2a91fcf · 2a91fcf
1 parent 5536790
commit 2a91fcf
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Showing 13 changed files with 651 additions and 30 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: a9aa1d02de36b450990b0e25a88fc2ff1c3e6b94
+refs/heads/master: 58687acba59266735adb8ccd9b5b9aa2c7cd205b
diff --git a/trunk/Documentation/kernel-parameters.txt b/trunk/Documentation/kernel-parameters.txt
@@ -1777,6 +1777,8 @@ and is between 256 and 4096 characters. It is defined in the file
 
 	nousb		[USB] Disable the USB subsystem
 
+	nowatchdog	[KNL] Disable the lockup detector.
+
 	nowb		[ARM]
 
 	nox2apic	[X86-64,APIC] Do not enable x2APIC mode.

diff --git a/trunk/arch/x86/include/asm/nmi.h b/trunk/arch/x86/include/asm/nmi.h
@@ -17,7 +17,7 @@ int do_nmi_callback(struct pt_regs *regs, int cpu);
 
 extern void die_nmi(char *str, struct pt_regs *regs, int do_panic);
 extern int check_nmi_watchdog(void);
-#if !defined(CONFIG_NMI_WATCHDOG)
+#if !defined(CONFIG_LOCKUP_DETECTOR)
 extern int nmi_watchdog_enabled;
 #endif
 extern int avail_to_resrv_perfctr_nmi_bit(unsigned int);

diff --git a/trunk/arch/x86/kernel/apic/Makefile b/trunk/arch/x86/kernel/apic/Makefile
@@ -3,10 +3,10 @@
 #
 
 obj-$(CONFIG_X86_LOCAL_APIC)	+= apic.o apic_noop.o probe_$(BITS).o ipi.o
-ifneq ($(CONFIG_NMI_WATCHDOG),y)
+ifneq ($(CONFIG_LOCKUP_DETECTOR),y)
 obj-$(CONFIG_X86_LOCAL_APIC)	+= nmi.o
 endif
-obj-$(CONFIG_NMI_WATCHDOG)	+= hw_nmi.o
+obj-$(CONFIG_LOCKUP_DETECTOR)	+= hw_nmi.o
 
 obj-$(CONFIG_X86_IO_APIC)	+= io_apic.o
 obj-$(CONFIG_SMP)		+= ipi.o

diff --git a/trunk/arch/x86/kernel/apic/hw_nmi.c b/trunk/arch/x86/kernel/apic/hw_nmi.c
@@ -89,7 +89,7 @@ int hw_nmi_is_cpu_stuck(struct pt_regs *regs)
 
 u64 hw_nmi_get_sample_period(void)
 {
-	return cpu_khz * 1000;
+	return (u64)(cpu_khz) * 1000 * 60;
 }
 
 #ifdef ARCH_HAS_NMI_WATCHDOG

diff --git a/trunk/arch/x86/kernel/traps.c b/trunk/arch/x86/kernel/traps.c
@@ -406,15 +406,15 @@ static notrace __kprobes void default_do_nmi(struct pt_regs *regs)
 							== NOTIFY_STOP)
 			return;
 
-#ifndef CONFIG_NMI_WATCHDOG
+#ifndef CONFIG_LOCKUP_DETECTOR
 		/*
 		 * Ok, so this is none of the documented NMI sources,
 		 * so it must be the NMI watchdog.
 		 */
 		if (nmi_watchdog_tick(regs, reason))
 			return;
 		if (!do_nmi_callback(regs, cpu))
-#endif /* !CONFIG_NMI_WATCHDOG */
+#endif /* !CONFIG_LOCKUP_DETECTOR */
 			unknown_nmi_error(reason, regs);
 #else
 		unknown_nmi_error(reason, regs);

diff --git a/trunk/include/linux/nmi.h b/trunk/include/linux/nmi.h
@@ -20,7 +20,7 @@ extern void touch_nmi_watchdog(void);
 extern void acpi_nmi_disable(void);
 extern void acpi_nmi_enable(void);
 #else
-#ifndef CONFIG_NMI_WATCHDOG
+#ifndef CONFIG_LOCKUP_DETECTOR
 static inline void touch_nmi_watchdog(void)
 {
 	touch_softlockup_watchdog();
@@ -51,12 +51,12 @@ static inline bool trigger_all_cpu_backtrace(void)
 }
 #endif
 
-#ifdef CONFIG_NMI_WATCHDOG
+#ifdef CONFIG_LOCKUP_DETECTOR
 int hw_nmi_is_cpu_stuck(struct pt_regs *);
 u64 hw_nmi_get_sample_period(void);
-extern int nmi_watchdog_enabled;
+extern int watchdog_enabled;
 struct ctl_table;
-extern int proc_nmi_enabled(struct ctl_table *, int ,
+extern int proc_dowatchdog_enabled(struct ctl_table *, int ,
 			void __user *, size_t *, loff_t *);
 #endif
 

diff --git a/trunk/include/linux/sched.h b/trunk/include/linux/sched.h
@@ -346,6 +346,12 @@ 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")))
 

diff --git a/trunk/init/Kconfig b/trunk/init/Kconfig
@@ -944,8 +944,11 @@ config PERF_USE_VMALLOC
 
 config PERF_EVENTS_NMI
 	bool
+	depends on PERF_EVENTS
 	help
-	  Arch has support for nmi_watchdog
+	  System hardware can generate an NMI using the perf event
+	  subsystem.  Also has support for calculating CPU cycle events
+	  to determine how many clock cycles in a given period.
 
 menu "Kernel Performance Events And Counters"
 

diff --git a/trunk/kernel/Makefile b/trunk/kernel/Makefile
@@ -76,9 +76,8 @@ obj-$(CONFIG_GCOV_KERNEL) += gcov/
 obj-$(CONFIG_AUDIT_TREE) += audit_tree.o
 obj-$(CONFIG_KPROBES) += kprobes.o
 obj-$(CONFIG_KGDB) += kgdb.o
-obj-$(CONFIG_DETECT_SOFTLOCKUP) += softlockup.o
-obj-$(CONFIG_NMI_WATCHDOG) += nmi_watchdog.o
 obj-$(CONFIG_DETECT_HUNG_TASK) += hung_task.o
+obj-$(CONFIG_LOCKUP_DETECTOR) += watchdog.o
 obj-$(CONFIG_GENERIC_HARDIRQS) += irq/
 obj-$(CONFIG_SECCOMP) += seccomp.o
 obj-$(CONFIG_RCU_TORTURE_TEST) += rcutorture.o

diff --git a/trunk/kernel/sysctl.c b/trunk/kernel/sysctl.c
@@ -74,7 +74,7 @@
 #include <scsi/sg.h>
 #endif
 
-#ifdef CONFIG_NMI_WATCHDOG
+#ifdef CONFIG_LOCKUP_DETECTOR
 #include <linux/nmi.h>
 #endif
 
@@ -686,16 +686,25 @@ static struct ctl_table kern_table[] = {
 		.mode		= 0444,
 		.proc_handler	= proc_dointvec,
 	},
-#if defined(CONFIG_NMI_WATCHDOG)
+#if defined(CONFIG_LOCKUP_DETECTOR)
 	{
-		.procname       = "nmi_watchdog",
-		.data           = &nmi_watchdog_enabled,
+		.procname       = "watchdog",
+		.data           = &watchdog_enabled,
 		.maxlen         = sizeof (int),
 		.mode           = 0644,
-		.proc_handler   = proc_nmi_enabled,
+		.proc_handler   = proc_dowatchdog_enabled,
+	},
+	{
+		.procname	= "watchdog_thresh",
+		.data		= &softlockup_thresh,
+		.maxlen		= sizeof(int),
+		.mode		= 0644,
+		.proc_handler	= proc_dowatchdog_thresh,
+		.extra1		= &neg_one,
+		.extra2		= &sixty,
 	},
 #endif
-#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86) && !defined(CONFIG_NMI_WATCHDOG)
+#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86) && !defined(CONFIG_LOCKUP_DETECTOR)
 	{
 		.procname       = "unknown_nmi_panic",
 		.data           = &unknown_nmi_panic,