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Disable NMI watchdog by default properly 

This reverts commit 6ebf622b25 and
replaces it with one that actually works.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Linus Torvalds 2007-03-14 17:50:48 -07:00
parent 4e337adae4
commit 8ce5e3e45e
4 changed files with 3 additions and 14 deletions
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8
arch/i386/kernel/nmi.c
View File

@ -245,14 +245,6 @@ static int __init check_nmi_watchdog(void)
unsigned int *prev_nmi_count;
int cpu;
/* Enable NMI watchdog for newer systems.
Probably safe on most older systems too, but let's be careful.
IBM ThinkPads use INT10 inside SMM and that allows early NMI inside SMM
which hangs the system. Disable watchdog for all thinkpads */
if (nmi_watchdog == NMI_DEFAULT && dmi_get_year(DMI_BIOS_DATE) >= 2004 &&
!dmi_name_in_vendors("ThinkPad"))
nmi_watchdog = NMI_LOCAL_APIC;
if ((nmi_watchdog == NMI_NONE) || (nmi_watchdog == NMI_DEFAULT))
return 0;

5
arch/x86_64/kernel/nmi.c
View File

@ -187,10 +187,7 @@ void nmi_watchdog_default(void)
{
if (nmi_watchdog != NMI_DEFAULT)
return;
if (nmi_known_cpu())
nmi_watchdog = NMI_LOCAL_APIC;
else
nmi_watchdog = NMI_IO_APIC;
nmi_watchdog = NMI_NONE;
}
static int endflag __initdata = 0;

2
include/asm-i386/nmi.h
View File

@ -33,7 +33,7 @@ extern int nmi_watchdog_tick (struct pt_regs * regs, unsigned reason);
extern atomic_t nmi_active;
extern unsigned int nmi_watchdog;
#define NMI_DEFAULT 0
#define NMI_DEFAULT -1
#define NMI_NONE 0
#define NMI_IO_APIC 1
#define NMI_LOCAL_APIC 2

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

@ -64,7 +64,7 @@ extern int setup_nmi_watchdog(char *);
extern atomic_t nmi_active;
extern unsigned int nmi_watchdog;
#define NMI_DEFAULT 0
#define NMI_DEFAULT -1
#define NMI_NONE 0
#define NMI_IO_APIC 1
#define NMI_LOCAL_APIC 2