| Kconfig (4e17fee24a39448f3a20e9cf98887b7665825848) | Kconfig (973656fe1afb4adf95d7b9ab75d4660cd3821ea1) |
|---|---|
| 1# x86 configuration 2mainmenu "Linux Kernel Configuration for x86" 3 4# Select 32 or 64 bit 5config 64BIT 6 bool "64-bit kernel" if ARCH = "x86" 7 default ARCH = "x86_64" 8 help --- 228 unchanged lines hidden (view full) --- 237config X86_HAS_BOOT_CPU_ID 238 def_bool y 239 depends on X86_VOYAGER 240 241config SPARSE_IRQ 242 bool "Support sparse irq numbering" 243 depends on PCI_MSI || HT_IRQ 244 help | 1# x86 configuration 2mainmenu "Linux Kernel Configuration for x86" 3 4# Select 32 or 64 bit 5config 64BIT 6 bool "64-bit kernel" if ARCH = "x86" 7 default ARCH = "x86_64" 8 help --- 228 unchanged lines hidden (view full) --- 237config X86_HAS_BOOT_CPU_ID 238 def_bool y 239 depends on X86_VOYAGER 240 241config SPARSE_IRQ 242 bool "Support sparse irq numbering" 243 depends on PCI_MSI || HT_IRQ 244 help |
| 245 This enables support for sparse irq, esp for msi/msi-x. You may need 246 if you have lots of cards supports msi-x installed. | 245 This enables support for sparse irqs. This is useful for distro 246 kernels that want to define a high CONFIG_NR_CPUS value but still 247 want to have low kernel memory footprint on smaller machines. |
| 247 | 248 |
| 248 If you don't know what to do here, say Y. | 249 ( Sparse IRQs can also be beneficial on NUMA boxes, as they spread 250 out the irq_desc[] array in a more NUMA-friendly way. ) |
| 249 | 251 |
| 252 If you don't know what to do here, say N. 253 |
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| 250config NUMA_MIGRATE_IRQ_DESC 251 bool "Move irq desc when changing irq smp_affinity" 252 depends on SPARSE_IRQ && NUMA 253 default n 254 help 255 This enables moving irq_desc to cpu/node that irq will use handled. 256 257 If you don't know what to do here, say N. --- 1681 unchanged lines hidden --- | 254config NUMA_MIGRATE_IRQ_DESC 255 bool "Move irq desc when changing irq smp_affinity" 256 depends on SPARSE_IRQ && NUMA 257 default n 258 help 259 This enables moving irq_desc to cpu/node that irq will use handled. 260 261 If you don't know what to do here, say N. --- 1681 unchanged lines hidden --- |