| Kconfig (b899219572350685e6163ce7535efb5ad9bcd6a4) | Kconfig (600715dcdf567c86f8b2c6173fcfb4b873e25a19) |
|---|---|
| 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 --- 563 unchanged lines hidden (view full) --- 572 Support for software bounce buffers used on x86-64 systems 573 which don't have a hardware IOMMU (e.g. the current generation 574 of Intel's x86-64 CPUs). Using this PCI devices which can only 575 access 32-bits of memory can be used on systems with more than 576 3 GB of memory. If unsure, say Y. 577 578config IOMMU_HELPER 579 def_bool (CALGARY_IOMMU || GART_IOMMU || SWIOTLB || AMD_IOMMU) | 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 --- 563 unchanged lines hidden (view full) --- 572 Support for software bounce buffers used on x86-64 systems 573 which don't have a hardware IOMMU (e.g. the current generation 574 of Intel's x86-64 CPUs). Using this PCI devices which can only 575 access 32-bits of memory can be used on systems with more than 576 3 GB of memory. If unsure, say Y. 577 578config IOMMU_HELPER 579 def_bool (CALGARY_IOMMU || GART_IOMMU || SWIOTLB || AMD_IOMMU) |
| 580 |
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| 580config MAXSMP 581 bool "Configure Maximum number of SMP Processors and NUMA Nodes" | 581config MAXSMP 582 bool "Configure Maximum number of SMP Processors and NUMA Nodes" |
| 582 depends on X86_64 && SMP | 583 depends on X86_64 && SMP && BROKEN |
| 583 default n 584 help 585 Configure maximum number of CPUS and NUMA Nodes for this architecture. 586 If unsure, say N. 587 | 584 default n 585 help 586 Configure maximum number of CPUS and NUMA Nodes for this architecture. 587 If unsure, say N. 588 |
| 588if MAXSMP | |
| 589config NR_CPUS | 589config NR_CPUS |
| 590 int 591 default "4096" 592endif 593 594if !MAXSMP 595config NR_CPUS 596 int "Maximum number of CPUs (2-4096)" 597 range 2 4096 | 590 int "Maximum number of CPUs (2-512)" if !MAXSMP 591 range 2 512 |
| 598 depends on SMP | 592 depends on SMP |
| 593 default "4096" if MAXSMP |
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| 599 default "32" if X86_NUMAQ || X86_SUMMIT || X86_BIGSMP || X86_ES7000 600 default "8" 601 help 602 This allows you to specify the maximum number of CPUs which this | 594 default "32" if X86_NUMAQ || X86_SUMMIT || X86_BIGSMP || X86_ES7000 595 default "8" 596 help 597 This allows you to specify the maximum number of CPUs which this |
| 603 kernel will support. The maximum supported value is 4096 and the | 598 kernel will support. The maximum supported value is 512 and the |
| 604 minimum value which makes sense is 2. 605 606 This is purely to save memory - each supported CPU adds 607 approximately eight kilobytes to the kernel image. | 599 minimum value which makes sense is 2. 600 601 This is purely to save memory - each supported CPU adds 602 approximately eight kilobytes to the kernel image. |
| 608endif | |
| 609 610config SCHED_SMT 611 bool "SMT (Hyperthreading) scheduler support" 612 depends on X86_HT 613 help 614 SMT scheduler support improves the CPU scheduler's decision making 615 when dealing with Intel Pentium 4 chips with HyperThreading at a 616 cost of slightly increased overhead in some places. If unsure say --- 316 unchanged lines hidden (view full) --- 933 depends on X86_32 && !HIGHMEM4G 934 select RESOURCES_64BIT 935 help 936 PAE is required for NX support, and furthermore enables 937 larger swapspace support for non-overcommit purposes. It 938 has the cost of more pagetable lookup overhead, and also 939 consumes more pagetable space per process. 940 | 603 604config SCHED_SMT 605 bool "SMT (Hyperthreading) scheduler support" 606 depends on X86_HT 607 help 608 SMT scheduler support improves the CPU scheduler's decision making 609 when dealing with Intel Pentium 4 chips with HyperThreading at a 610 cost of slightly increased overhead in some places. If unsure say --- 316 unchanged lines hidden (view full) --- 927 depends on X86_32 && !HIGHMEM4G 928 select RESOURCES_64BIT 929 help 930 PAE is required for NX support, and furthermore enables 931 larger swapspace support for non-overcommit purposes. It 932 has the cost of more pagetable lookup overhead, and also 933 consumes more pagetable space per process. 934 |
| 935config ARCH_PHYS_ADDR_T_64BIT 936 def_bool X86_64 || X86_PAE 937 |
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| 941# Common NUMA Features 942config NUMA 943 bool "Numa Memory Allocation and Scheduler Support (EXPERIMENTAL)" 944 depends on SMP 945 depends on X86_64 || (X86_32 && HIGHMEM64G && (X86_NUMAQ || X86_BIGSMP || X86_SUMMIT && ACPI) && EXPERIMENTAL) 946 default n if X86_PC 947 default y if (X86_NUMAQ || X86_SUMMIT || X86_BIGSMP) 948 help --- 42 unchanged lines hidden (view full) --- 991config NUMA_EMU 992 bool "NUMA emulation" 993 depends on X86_64 && NUMA 994 help 995 Enable NUMA emulation. A flat machine will be split 996 into virtual nodes when booted with "numa=fake=N", where N is the 997 number of nodes. This is only useful for debugging. 998 | 938# Common NUMA Features 939config NUMA 940 bool "Numa Memory Allocation and Scheduler Support (EXPERIMENTAL)" 941 depends on SMP 942 depends on X86_64 || (X86_32 && HIGHMEM64G && (X86_NUMAQ || X86_BIGSMP || X86_SUMMIT && ACPI) && EXPERIMENTAL) 943 default n if X86_PC 944 default y if (X86_NUMAQ || X86_SUMMIT || X86_BIGSMP) 945 help --- 42 unchanged lines hidden (view full) --- 988config NUMA_EMU 989 bool "NUMA emulation" 990 depends on X86_64 && NUMA 991 help 992 Enable NUMA emulation. A flat machine will be split 993 into virtual nodes when booted with "numa=fake=N", where N is the 994 number of nodes. This is only useful for debugging. 995 |
| 999if MAXSMP 1000 | |
| 1001config NODES_SHIFT | 996config NODES_SHIFT |
| 1002 int 1003 default "9" 1004endif 1005 1006if !MAXSMP 1007config NODES_SHIFT 1008 int "Maximum NUMA Nodes (as a power of 2)" | 997 int "Maximum NUMA Nodes (as a power of 2)" if !MAXSMP |
| 1009 range 1 9 if X86_64 | 998 range 1 9 if X86_64 |
| 999 default "9" if MAXSMP |
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| 1010 default "6" if X86_64 1011 default "4" if X86_NUMAQ 1012 default "3" 1013 depends on NEED_MULTIPLE_NODES 1014 help 1015 Specify the maximum number of NUMA Nodes available on the target 1016 system. Increases memory reserved to accomodate various tables. | 1000 default "6" if X86_64 1001 default "4" if X86_NUMAQ 1002 default "3" 1003 depends on NEED_MULTIPLE_NODES 1004 help 1005 Specify the maximum number of NUMA Nodes available on the target 1006 system. Increases memory reserved to accomodate various tables. |
| 1017endif | |
| 1018 1019config HAVE_ARCH_BOOTMEM_NODE 1020 def_bool y 1021 depends on X86_32 && NUMA 1022 1023config ARCH_HAVE_MEMORY_PRESENT 1024 def_bool y 1025 depends on X86_32 && DISCONTIGMEM --- 174 unchanged lines hidden (view full) --- 1200 depends on X86_32 && SMP && X86_IO_APIC 1201 help 1202 The default yes will allow the kernel to do irq load balancing. 1203 Saying no will keep the kernel from doing irq load balancing. 1204 1205config SECCOMP 1206 def_bool y 1207 prompt "Enable seccomp to safely compute untrusted bytecode" | 1007 1008config HAVE_ARCH_BOOTMEM_NODE 1009 def_bool y 1010 depends on X86_32 && NUMA 1011 1012config ARCH_HAVE_MEMORY_PRESENT 1013 def_bool y 1014 depends on X86_32 && DISCONTIGMEM --- 174 unchanged lines hidden (view full) --- 1189 depends on X86_32 && SMP && X86_IO_APIC 1190 help 1191 The default yes will allow the kernel to do irq load balancing. 1192 Saying no will keep the kernel from doing irq load balancing. 1193 1194config SECCOMP 1195 def_bool y 1196 prompt "Enable seccomp to safely compute untrusted bytecode" |
| 1197 depends on PROC_FS |
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| 1208 help 1209 This kernel feature is useful for number crunching applications 1210 that may need to compute untrusted bytecode during their 1211 execution. By using pipes or other transports made available to 1212 the process as file descriptors supporting the read/write 1213 syscalls, it's possible to isolate those applications in 1214 their own address space using seccomp. Once seccomp is | 1198 help 1199 This kernel feature is useful for number crunching applications 1200 that may need to compute untrusted bytecode during their 1201 execution. By using pipes or other transports made available to 1202 the process as file descriptors supporting the read/write 1203 syscalls, it's possible to isolate those applications in 1204 their own address space using seccomp. Once seccomp is |
| 1215 enabled via prctl(PR_SET_SECCOMP), it cannot be disabled | 1205 enabled via /proc/<pid>/seccomp, it cannot be disabled |
| 1216 and the task is only allowed to execute a few safe syscalls 1217 defined by each seccomp mode. 1218 1219 If unsure, say Y. Only embedded should say N here. 1220 1221config CC_STACKPROTECTOR 1222 bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)" 1223 depends on X86_64 && EXPERIMENTAL && BROKEN --- 557 unchanged lines hidden (view full) --- 1781 depends on IA32_EMULATION 1782 1783config COMPAT_FOR_U64_ALIGNMENT 1784 def_bool COMPAT 1785 depends on X86_64 1786 1787config SYSVIPC_COMPAT 1788 def_bool y | 1206 and the task is only allowed to execute a few safe syscalls 1207 defined by each seccomp mode. 1208 1209 If unsure, say Y. Only embedded should say N here. 1210 1211config CC_STACKPROTECTOR 1212 bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)" 1213 depends on X86_64 && EXPERIMENTAL && BROKEN --- 557 unchanged lines hidden (view full) --- 1771 depends on IA32_EMULATION 1772 1773config COMPAT_FOR_U64_ALIGNMENT 1774 def_bool COMPAT 1775 depends on X86_64 1776 1777config SYSVIPC_COMPAT 1778 def_bool y |
| 1789 depends on COMPAT && SYSVIPC | 1779 depends on X86_64 && COMPAT && SYSVIPC |
| 1790 1791endmenu 1792 1793 1794source "net/Kconfig" 1795 1796source "drivers/Kconfig" 1797 --- 13 unchanged lines hidden --- | 1780 1781endmenu 1782 1783 1784source "net/Kconfig" 1785 1786source "drivers/Kconfig" 1787 --- 13 unchanged lines hidden --- |