From a1133d8e4ffc2db751eb987a2f3cf8ead67927c3 Mon Sep 17 00:00:00 2001 From: "Maciej W. Rozycki" Date: Wed, 21 May 2008 22:10:16 +0100 Subject: [PATCH] x86: APIC/SMP: downgrade the NMI watchdog for "nosmp" If configured to use the I/O APIC, the NMI watchdog is deemed to fail if the chip has been deactivated as a result of "nosmp". Downgrade to the local APIC watchdog similarly to what is done for the UP case. Signed-off-by: Maciej W. Rozycki Signed-off-by: Ingo Molnar --- arch/x86/kernel/smpboot.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c index 8c53d86e3e..df60bc7c9c 100644 --- a/arch/x86/kernel/smpboot.c +++ b/arch/x86/kernel/smpboot.c @@ -1159,6 +1159,10 @@ static int __init smp_sanity_check(unsigned max_cpus) if (!max_cpus) { printk(KERN_INFO "SMP mode deactivated.\n"); smpboot_clear_io_apic(); + + if (nmi_watchdog != NMI_NONE && nmi_watchdog != NMI_DISABLED) + nmi_watchdog = NMI_LOCAL_APIC; + #ifdef CONFIG_X86_32 connect_bsp_APIC(); #endif -- 2.39.5