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x86, sparseirq: clean up Kconfig entry

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Impact: improve help text

Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Ingo Molnar 2008-12-25 16:26:47 +01:00
parent 4e17fee24a
commit 973656fe1a
1 changed files with 7 additions and 3 deletions
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10
arch/x86/Kconfig
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@ -242,10 +242,14 @@ config SPARSE_IRQ
bool "Support sparse irq numbering"
depends on PCI_MSI || HT_IRQ
help
This enables support for sparse irq, esp for msi/msi-x. You may need
if you have lots of cards supports msi-x installed.
This enables support for sparse irqs. This is useful for distro
kernels that want to define a high CONFIG_NR_CPUS value but still
want to have low kernel memory footprint on smaller machines.
If you don't know what to do here, say Y.
( Sparse IRQs can also be beneficial on NUMA boxes, as they spread
out the irq_desc[] array in a more NUMA-friendly way. )
If you don't know what to do here, say N.
config NUMA_MIGRATE_IRQ_DESC
bool "Move irq desc when changing irq smp_affinity"