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Date: Thu, 24 Jun 2010 14:34:13 -0500 From: Jack Steiner <steiner@....com> To: mingo@...e.hu, tglx@...utronix.de Cc: linux-kernel@...r.kernel.org Subject: [PATCH] - irq vector assignment Try to assign irqs to cpus on the correct node & fall back to global assignment only if node-local fails. This reduces the chances of using all of the interrupt vectors of a single cpu. Signed-off-by: Jack Steiner <steiner@....com> --- arch/x86/kernel/apic/io_apic.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) Index: linux/arch/x86/kernel/apic/io_apic.c =================================================================== --- linux.orig/arch/x86/kernel/apic/io_apic.c 2010-06-24 12:58:11.658933610 -0500 +++ linux/arch/x86/kernel/apic/io_apic.c 2010-06-24 13:56:26.734380290 -0500 @@ -3259,7 +3259,9 @@ unsigned int create_irq_nr(unsigned int desc_new = move_irq_desc(desc_new, node); cfg_new = desc_new->chip_data; - if (__assign_irq_vector(new, cfg_new, apic->target_cpus()) == 0) + if (node >= 0 && __assign_irq_vector(new, cfg_new, node_to_cpumask_map[node]) == 0) + irq = new; + else if (__assign_irq_vector(new, cfg_new, apic->target_cpus()) == 0) irq = new; break; } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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