Commit 9ce91685 authored by Yang Li's avatar Yang Li Committed by Benjamin Herrenschmidt

powerpc: Disable SPARSE_IRQ by default

The SPARSE_IRQ considerably adds overhead to critical path of IRQ
handling.  However it doesn't benefit much in space for most systems with
limited IRQ_NR.  Should be disabled unless really necessary.
Signed-off-by: default avatarLi Yang <leoli@freescale.com>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent 5afd878a
......@@ -400,7 +400,7 @@ config IRQ_ALL_CPUS
config SPARSE_IRQ
bool "Support sparse irq numbering"
default y
default n
help
This enables support for sparse irqs. This is useful for distro
kernels that want to define a high CONFIG_NR_CPUS value but still
......@@ -409,7 +409,7 @@ config SPARSE_IRQ
( 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 Y.
If you don't know what to do here, say N.
config NUMA
bool "NUMA support"
......
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