[patch 54/55] x86/apic: Mark single target interrupts
If the interrupt destination mode of the APIC is physical then the effective affinity is restricted to a single CPU. Mark the interrupt accordingly in the domain allocation code, so the core code can avoid pointless affinity setting attempts. Signed-off-by: Thomas Gleixner--- arch/x86/kernel/apic/vector.c |7 +++ 1 file changed, 7 insertions(+) --- a/arch/x86/kernel/apic/vector.c +++ b/arch/x86/kernel/apic/vector.c @@ -371,6 +371,13 @@ static int x86_vector_alloc_irqs(struct irq_data); if (err) goto error; + /* +* If the apic destination mode is physical, then the +* effective affinity is restricted to a single target +* CPU. Mark the interrupt accordingly. +*/ + if (!apic->irq_dest_mode) + irqd_set_single_target(irq_data); } return 0;
[patch 54/55] x86/apic: Mark single target interrupts
If the interrupt destination mode of the APIC is physical then the effective affinity is restricted to a single CPU. Mark the interrupt accordingly in the domain allocation code, so the core code can avoid pointless affinity setting attempts. Signed-off-by: Thomas Gleixner --- arch/x86/kernel/apic/vector.c |7 +++ 1 file changed, 7 insertions(+) --- a/arch/x86/kernel/apic/vector.c +++ b/arch/x86/kernel/apic/vector.c @@ -371,6 +371,13 @@ static int x86_vector_alloc_irqs(struct irq_data); if (err) goto error; + /* +* If the apic destination mode is physical, then the +* effective affinity is restricted to a single target +* CPU. Mark the interrupt accordingly. +*/ + if (!apic->irq_dest_mode) + irqd_set_single_target(irq_data); } return 0;