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| 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 /arch/x86 | |
| parent | 56b581ea9591b5767b1e0204c6a06c7d0c49396e (diff) | |
| download | kernel_samsung_smdk4412-15e957d08dd4a841359cfec59ecb74041e0097aa.tar.gz kernel_samsung_smdk4412-15e957d08dd4a841359cfec59ecb74041e0097aa.tar.bz2 kernel_samsung_smdk4412-15e957d08dd4a841359cfec59ecb74041e0097aa.zip | |
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/Kconfig | 4 | ||||
| -rw-r--r-- | arch/x86/kernel/apic/io_apic.c | 6 |
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; |