Attachment 151651 Details for Bug 206366 – RHEL5 fix for this issue

[patch] RHEL5 fix for this issue

206366-v3.patch (text/plain), 2.21 KB, created by Prarit Bhargava on 2007-04-04 12:06:56 UTC

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Creator: Prarit Bhargava

Created: 2007-04-04 12:06:56 UTC

Size: 2.21 KB

patch

obsolete

>Backport of softlockup watchdog fixes.
>
>Avoids bogus softlockup message when doing sysrq-t output.
>
>Currently in -mm tree as add-touch_all_softlockup_watchdogs.patch .
>
>Resolves BZ 206336.
>
>Successfully tested by me.
>
>diff -urNp -X linux-2.6.18.x86_64/Documentation/dontdiff linux-2.6.18.x86_64.orig/include/linux/sched.h linux-2.6.18.x86_64/include/linux/sched.h
>--- linux-2.6.18.x86_64.orig/include/linux/sched.h	2007-03-28 09:53:55.000000000 -0400
>+++ linux-2.6.18.x86_64/include/linux/sched.h	2007-04-03 05:24:19.000000000 -0400
>@@ -216,6 +216,7 @@ extern void scheduler_tick(void);
> extern void softlockup_tick(void);
> extern void spawn_softlockup_task(void);
> extern void touch_softlockup_watchdog(void);
>+extern void touch_all_softlockup_watchdogs(void);
> #else
> static inline void softlockup_tick(void)
> {
>@@ -226,6 +227,9 @@ static inline void spawn_softlockup_task
> static inline void touch_softlockup_watchdog(void)
> {
> }
>+static inline void touch_all_softlockup_watchdogs(void)
>+{
>+}
> #endif
> 
> 
>diff -urNp -X linux-2.6.18.x86_64/Documentation/dontdiff linux-2.6.18.x86_64.orig/kernel/sched.c linux-2.6.18.x86_64/kernel/sched.c
>--- linux-2.6.18.x86_64.orig/kernel/sched.c	2007-03-28 09:53:54.000000000 -0400
>+++ linux-2.6.18.x86_64/kernel/sched.c	2007-04-03 05:24:19.000000000 -0400
>@@ -4803,6 +4803,8 @@ void show_state(void)
> 		show_task(p);
> 	} while_each_thread(g, p);
> 
>+	touch_all_softlockup_watchdogs();
>+
> 	read_unlock(&tasklist_lock);
> 	debug_show_all_locks();
> }
>diff -urNp -X linux-2.6.18.x86_64/Documentation/dontdiff linux-2.6.18.x86_64.orig/kernel/softlockup.c linux-2.6.18.x86_64/kernel/softlockup.c
>--- linux-2.6.18.x86_64.orig/kernel/softlockup.c	2007-03-28 09:53:54.000000000 -0400
>+++ linux-2.6.18.x86_64/kernel/softlockup.c	2007-04-03 05:24:19.000000000 -0400
>@@ -40,6 +40,16 @@ void touch_softlockup_watchdog(void)
> }
> EXPORT_SYMBOL(touch_softlockup_watchdog);
> 
>+void touch_all_softlockup_watchdogs(void)
>+{
>+	int cpu;
>+
>+	/* Cause each CPU to re-update its timestamp rather than complain */
>+	for_each_online_cpu(cpu)
>+		per_cpu(touch_timestamp, cpu) = jiffies;
>+}
>+EXPORT_SYMBOL(touch_all_softlockup_watchdogs);
>+
> /*
>  * This callback runs from the timer interrupt, and checks
>  * whether the watchdog thread has hung or not:

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