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[PATCH] Add SMP support on x86_64 to reservation framework

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This patch includes the changes to make the nmi watchdog on x86_64 SMP
aware.  A bunch of code was moved around to make it simpler to read.  In
addition, it is now possible to determine if a particular NMI was the result
of the watchdog or not.  This feature allows the kernel to filter out
unknown NMIs easier.

Signed-off-by:  Don Zickus <dzickus@redhat.com>
Signed-off-by: Andi Kleen <ak@suse.de>
This commit is contained in:
Don Zickus
2006-09-26 10:52:26 +02:00
committed by Andi Kleen
parent cb9c448c66
commit f2802e7f57
3 changed files with 292 additions and 144 deletions
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arch/x86_64/kernel/apic.c
+1 -2
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@@ -479,8 +479,7 @@ void __cpuinit setup_local_APIC (void)
}
nmi_watchdog_default();
if (nmi_watchdog == NMI_LOCAL_APIC)
setup_apic_nmi_watchdog();
setup_apic_nmi_watchdog(NULL);
apic_pm_activate();
}
arch/x86_64/kernel/nmi.c
+289 -141
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File diff suppressed because it is too large Load Diff
include/asm-x86_64/nmi.h
+2 -1
View File
@@ -63,7 +63,7 @@ extern void release_perfctr_nmi(unsigned int);
extern int reserve_evntsel_nmi(unsigned int);
extern void release_evntsel_nmi(unsigned int);
extern void setup_apic_nmi_watchdog (void);
extern void setup_apic_nmi_watchdog (void *);
extern int reserve_lapic_nmi(void);
extern void release_lapic_nmi(void);
extern void disable_timer_nmi_watchdog(void);
@@ -73,6 +73,7 @@ extern void nmi_watchdog_tick (struct pt_regs * regs, unsigned reason);
extern void nmi_watchdog_default(void);
extern int setup_nmi_watchdog(char *);
extern atomic_t nmi_active;
extern unsigned int nmi_watchdog;
#define NMI_DEFAULT -1
#define NMI_NONE 0