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softirq: allocate less vectors

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We don't need whole 32 of them, only NR_SOFTIRQS.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Alexey Dobriyan 2008-09-06 20:04:36 +02:00 committed by Ingo Molnar
parent 70bb08962e
commit 978b0116cd
2 changed files with 3 additions and 1 deletions
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2
include/linux/interrupt.h
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@ -252,6 +252,8 @@ enum
HRTIMER_SOFTIRQ, HRTIMER_SOFTIRQ,
#endif #endif
RCU_SOFTIRQ, /* Preferable RCU should always be the last softirq */ RCU_SOFTIRQ, /* Preferable RCU should always be the last softirq */
NR_SOFTIRQS
}; };
/* softirq mask and active fields moved to irq_cpustat_t in /* softirq mask and active fields moved to irq_cpustat_t in

2
kernel/softirq.c
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@ -46,7 +46,7 @@ irq_cpustat_t irq_stat[NR_CPUS] ____cacheline_aligned;
EXPORT_SYMBOL(irq_stat); EXPORT_SYMBOL(irq_stat);
#endif #endif
static struct softirq_action softirq_vec[32] __cacheline_aligned_in_smp; static struct softirq_action softirq_vec[NR_SOFTIRQS] __cacheline_aligned_in_smp;
static DEFINE_PER_CPU(struct task_struct *, ksoftirqd); static DEFINE_PER_CPU(struct task_struct *, ksoftirqd);