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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 <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Maciej W. Rozycki 2008-05-21 22:10:16 +01:00 committed by Ingo Molnar
parent 73d08e6360
commit a1133d8e4f
1 changed files with 4 additions and 0 deletions
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4
arch/x86/kernel/smpboot.c
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@ -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