diff options
| author | Yinghai Lu <yinghai@kernel.org> | 2009-04-30 01:17:50 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-05-01 19:01:12 +0200 |
| commit | 15e957d08dd4a841359cfec59ecb74041e0097aa (patch) | |
| tree | e18a8b70751c552ba2bd7248660f137a735938ea /include | |
| parent | 56b581ea9591b5767b1e0204c6a06c7d0c49396e (diff) | |
x86/irq: use move_irq_desc() in create_irq_nr()
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>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/irq.h | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/include/linux/irq.h b/include/linux/irq.h index 4b95ddb5304..eedbb8e5e0c 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -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); |