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authorYinghai Lu <yinghai@kernel.org>2009-04-30 01:17:50 -0700
committerIngo Molnar <mingo@elte.hu>2009-05-01 19:01:12 +0200
commit15e957d08dd4a841359cfec59ecb74041e0097aa (patch)
treee18a8b70751c552ba2bd7248660f137a735938ea /arch/x86
parent56b581ea9591b5767b1e0204c6a06c7d0c49396e (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 'arch/x86')
-rw-r--r--arch/x86/Kconfig4
-rw-r--r--arch/x86/kernel/apic/io_apic.c6
2 files changed, 5 insertions, 5 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index e1b2543f8ed..674e21e9f0a 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -274,6 +274,10 @@ config SPARSE_IRQ
If you don't know what to do here, say N.
+config NUMA_IRQ_DESC
+ def_bool y
+ depends on SPARSE_IRQ && NUMA
+
config X86_MPPARSE
bool "Enable MPS table" if ACPI
default y
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 9cd4806cdf5..e583291fe6c 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -3197,11 +3197,7 @@ unsigned int create_irq_nr(unsigned int irq_want, int node)
if (cfg_new->vector != 0)
continue;
-#ifdef CONFIG_NUMA_IRQ_DESC
- /* different node ?*/
- if (desc_new->node != node)
- desc = move_irq_desc(desc, node);
-#endif
+ desc_new = move_irq_desc(desc_new, node);
if (__assign_irq_vector(new, cfg_new, apic->target_cpus()) == 0)
irq = new;