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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/Kconfig
parent56b581ea9591b5767b1e0204c6a06c7d0c49396e (diff)
downloadlwn-15e957d08dd4a841359cfec59ecb74041e0097aa.tar.gz
lwn-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/Kconfig')
-rw-r--r--arch/x86/Kconfig4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index e1b2543f8ed3..674e21e9f0a0 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