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authorAndi Kleen <ak@suse.de>2005-05-16 21:53:34 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-05-17 07:59:16 -0700
commit751521149a05e308d863d01ced61080ce1a2ec99 (patch)
treecb8312f502b257cc5d9a5a478acf35c5a5821665 /include/asm-x86_64
parentf3c5f5e7eeaf7c68ecc1d37200cd1ade0b3da7b9 (diff)
downloadlinux-751521149a05e308d863d01ced61080ce1a2ec99.tar.gz
[PATCH] x86_64: Collected NMI watchdog fixes.
Collected NMI watchdog fixes. - Fix call of check_nmi_watchdog - Remove earlier move of check_nmi_watchdog to later. It does not fix the race it was supposed to fix fully. - Remove unused P6 definitions - Add support for performance counter based watchdog on P4 systems. This allows to run it only once per second, which saves some CPU time. Previously it would run at 1000Hz, which was too much. Code ported from i386 Make this the default on Intel systems. - Use check_nmi_watchdog with local APIC based nmi - Fix race in touch_nmi_watchdog - Fix bug that caused incorrect performance counters to be programmed in a few cases on K8. - Remove useless check for local APIC - Use local_t and per_cpu variables for per CPU data. - Keep other CPUs busy during check_nmi_watchdog to make sure they really tick when in lapic mode. - Only check CPUs that are actually online. - Various other fixes. - Fix fallback path when MSRs are unimplemented Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-x86_64')
-rw-r--r--include/asm-x86_64/nmi.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/asm-x86_64/nmi.h b/include/asm-x86_64/nmi.h
index 21d56b086b9..d3abfc6a8fd 100644
--- a/include/asm-x86_64/nmi.h
+++ b/include/asm-x86_64/nmi.h
@@ -53,5 +53,7 @@ extern void die_nmi(char *str, struct pt_regs *regs);
extern int panic_on_timeout;
extern int unknown_nmi_panic;
+
+extern int check_nmi_watchdog(void);
#endif /* ASM_NMI_H */