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x86/irq: use move_irq_desc() in create_irq_nr()

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move_irq_desc() will try to move irq_desc to the home node if
the allocated one is not correct, in create_irq_nr().

( This can happen on devices that are on different nodes that
  are using MSI, when drivers are loaded and unloaded randomly. )

v2: fix non-smp build
v3: add NUMA_IRQ_DESC to eliminate #ifdefs

[ Impact: improve irq descriptor locality on NUMA systems ]

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
LKML-Reference: <49F95EAE.2050903@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Yinghai Lu
2009-04-30 01:17:50 -07:00
committed by Ingo Molnar
parent 56b581ea95
commit 15e957d08d
4 changed files with 15 additions and 8 deletions
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11
include/linux/irq.h
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@@ -206,9 +206,16 @@ extern void arch_free_chip_data(struct irq_desc *old_desc, struct irq_desc *desc
#ifndef CONFIG_SPARSE_IRQ
extern struct irq_desc irq_desc[NR_IRQS];
#else /* CONFIG_SPARSE_IRQ */
#endif
#ifdef CONFIG_NUMA_IRQ_DESC
extern struct irq_desc *move_irq_desc(struct irq_desc *old_desc, int node);
#endif /* CONFIG_SPARSE_IRQ */
#else
static inline struct irq_desc *move_irq_desc(struct irq_desc *desc, int node)
{
return desc;
}
#endif
extern struct irq_desc *irq_to_desc_alloc_node(unsigned int irq, int node);