perf_counter, x86: Fix APIC NMI programming
authorIngo Molnar <mingo@elte.hu>
Tue, 26 May 2009 06:10:00 +0000 (08:10 +0200)
committerIngo Molnar <mingo@elte.hu>
Tue, 26 May 2009 07:49:28 +0000 (09:49 +0200)
commit79202ba9ff8cf570a75596f42e011167734d1c4b
treea7a2ebd002db9a212319da0bdc82609fe47e49e1
parent8a7b8cb91f26a671f22cedc7fd54508667f2d9b9
perf_counter, x86: Fix APIC NMI programming

My Nehalem box locks up in certain situations (with an
always-asserted NMI causing a lockup) if the PMU LVT
entry is programmed between NMI and IRQ mode with a
high frequency.

Standardize exlusively on NMIs instead.

[ Impact: fix lockup ]

Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: John Kacur <jkacur@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
arch/x86/kernel/cpu/perf_counter.c