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[PATCH] Fix up panic messages for different NMI panics 

When a unknown NMI happened the panic would claim a NMI watchdog timeout.
Also it would check the variable set by nmi_watchdog=panic and panic then.

Fix up the panic message to be generic
Unconditionally panic on unknown NMI when panic on unknown nmi is enabled.

Noticed by Jan Beulich

Cc: jbeulich@novell.com

Signed-off-by: Andi Kleen <ak@suse.de>
This commit is contained in:
Andi Kleen 2006-09-26 10:52:27 +02:00 committed by Andi Kleen
parent 4038f901cf
commit fac58550e8
3 changed files with 7 additions and 7 deletions
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5
arch/x86_64/kernel/nmi.c
View File

@ -695,7 +695,8 @@ int __kprobes nmi_watchdog_tick(struct pt_regs * regs, unsigned reason)
*/
local_inc(&__get_cpu_var(alert_counter));
if (local_read(&__get_cpu_var(alert_counter)) == 5*nmi_hz)
die_nmi("NMI Watchdog detected LOCKUP on CPU %d\n", regs);
die_nmi("NMI Watchdog detected LOCKUP on CPU %d\n", regs,
panic_on_timeout);
} else {
__get_cpu_var(last_irq_sum) = sum;
local_set(&__get_cpu_var(alert_counter), 0);
@ -765,7 +766,7 @@ static int unknown_nmi_panic_callback(struct pt_regs *regs, int cpu)
char buf[64];
sprintf(buf, "NMI received for unknown reason %02x\n", reason);
die_nmi(buf,regs);
die_nmi(buf, regs, 1); /* Always panic here */
return 0;
}

7
arch/x86_64/kernel/traps.c
View File

@ -570,7 +570,7 @@ void die(const char * str, struct pt_regs * regs, long err)
do_exit(SIGSEGV);
}
void __kprobes die_nmi(char *str, struct pt_regs *regs)
void __kprobes die_nmi(char *str, struct pt_regs *regs, int do_panic)
{
unsigned long flags = oops_begin();
@ -582,9 +582,8 @@ void __kprobes die_nmi(char *str, struct pt_regs *regs)
show_registers(regs);
if (kexec_should_crash(current))
crash_kexec(regs);
if (panic_on_timeout || panic_on_oops)
panic("nmi watchdog");
printk("console shuts up ...\n");
if (do_panic || panic_on_oops)
panic("Non maskable interrupt");
oops_end(flags);
nmi_exit();
local_irq_enable();

2
include/asm-x86_64/nmi.h
View File

@ -37,7 +37,7 @@ static inline void unset_nmi_pm_callback(struct pm_dev * dev)
#endif /* CONFIG_PM */
extern void default_do_nmi(struct pt_regs *);
extern void die_nmi(char *str, struct pt_regs *regs);
extern void die_nmi(char *str, struct pt_regs *regs, int do_panic);
#define get_nmi_reason() inb(0x61)