x86: resize NR_IRQS for large machines
On machines with very large numbers of cpus, tables that are dimensioned by NR_IRQS get very large, especially the irq_desc table. They are also very sparsely used. When the cpu count is > MAX_IO_APICS, use MAX_IO_APICS to set NR_IRQS, otherwise use NR_CPUS. Signed-off-by: Alan Mayer <ajm@sgi.com> Reviewed-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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* <tomsoft@informatik.tu-chemnitz.de>
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* <tomsoft@informatik.tu-chemnitz.de>
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*/
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*/
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#include <asm/apicdef.h>
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#define TIMER_IRQ 0
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#define TIMER_IRQ 0
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/*
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/*
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#define FIRST_SYSTEM_VECTOR 0xef /* duplicated in hw_irq.h */
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#define FIRST_SYSTEM_VECTOR 0xef /* duplicated in hw_irq.h */
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#if NR_CPUS < MAX_IO_APICS
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#define NR_IRQS (NR_VECTORS + (32 * NR_CPUS))
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#define NR_IRQS (NR_VECTORS + (32 * NR_CPUS))
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#else
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#define NR_IRQS (NR_VECTORS + (32 * MAX_IO_APICS))
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#endif
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#define NR_IRQ_VECTORS NR_IRQS
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#define NR_IRQ_VECTORS NR_IRQS
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static inline int irq_canonicalize(int irq)
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static inline int irq_canonicalize(int irq)
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#ifndef _LINUX_KERNEL_STAT_H
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#ifndef _LINUX_KERNEL_STAT_H
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#define _LINUX_KERNEL_STAT_H
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#define _LINUX_KERNEL_STAT_H
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#include <asm/irq.h>
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#include <linux/smp.h>
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#include <linux/smp.h>
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#include <linux/threads.h>
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#include <linux/threads.h>
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#include <linux/percpu.h>
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#include <linux/percpu.h>
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#include <linux/cpumask.h>
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#include <linux/cpumask.h>
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#include <asm/irq.h>
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#include <asm/cputime.h>
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#include <asm/cputime.h>
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/*
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/*
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