config/Config-kernel.in

   1 # Copyright (C) 2006-2014 OpenWrt.org
   2 #
   3 # This is free software, licensed under the GNU General Public License v2.
   4 # See /LICENSE for more information.
   5 #
   6
   7 config KERNEL_BUILD_USER
   8         string "Custom Kernel Build User Name"
   9         default "builder" if BUILDBOT
  10         default ""
  11         help
  12           Sets the Kernel build user string, which for example will be returned
  13           by 'uname -a' on running systems.
  14           If not set, uses system user at build time.
  15
  16 config KERNEL_BUILD_DOMAIN
  17         string "Custom Kernel Build Domain Name"
  18         default "buildhost" if BUILDBOT
  19         default ""
  20         help
  21           Sets the Kernel build domain string, which for example will be
  22           returned by 'uname -a' on running systems.
  23           If not set, uses system hostname at build time.
  24
  25 config KERNEL_PRINTK
  26         bool "Enable support for printk"
  27         default y
  28
  29 config KERNEL_CRASHLOG
  30         bool "Crash logging"
  31         depends on !(arm || powerpc || sparc || TARGET_uml || i386 || x86_64)
  32         default y
  33
  34 config KERNEL_SWAP
  35         bool "Support for paging of anonymous memory (swap)"
  36         default y if !SMALL_FLASH
  37
  38 config KERNEL_DEBUG_FS
  39         bool "Compile the kernel with debug filesystem enabled"
  40         default y
  41         help
  42           debugfs is a virtual file system that kernel developers use to put
  43           debugging files into. Enable this option to be able to read and
  44           write to these files. Many common debugging facilities, such as
  45           ftrace, require the existence of debugfs.
  46
  47 config KERNEL_MIPS_FPU_EMULATOR
  48         bool "Compile the kernel with MIPS FPU Emulator"
  49         default y if TARGET_pistachio
  50         depends on (mips || mipsel || mips64 || mips64el)
  51
  52 config KERNEL_ARM_PMU
  53         bool
  54         default n
  55         depends on (arm || aarch64)
  56
  57 config KERNEL_PERF_EVENTS
  58         bool "Compile the kernel with performance events and counters"
  59         default n
  60         select KERNEL_ARM_PMU if (arm || aarch64)
  61
  62 config KERNEL_PROFILING
  63         bool "Compile the kernel with profiling enabled"
  64         default n
  65         select KERNEL_PERF_EVENTS
  66         help
  67           Enable the extended profiling support mechanisms used by profilers such
  68           as OProfile.
  69
  70 config KERNEL_TASKSTATS
  71         bool "Compile the kernel with task resource/io statistics and accounting"
  72         default n
  73         help
  74           Enable the collection and publishing of task/io statistics and
  75           accounting.  Enable this option to enable i/o monitoring in system
  76           monitors.
  77
  78 if KERNEL_TASKSTATS
  79
  80         config KERNEL_TASK_DELAY_ACCT
  81                 def_bool y
  82
  83         config KERNEL_TASK_IO_ACCOUNTING
  84                 def_bool y
  85
  86         config KERNEL_TASK_XACCT
  87                 def_bool y
  88
  89 endif
  90
  91 config KERNEL_KALLSYMS
  92         bool "Compile the kernel with symbol table information"
  93         default y if !SMALL_FLASH
  94         help
  95           This will give you more information in stack traces from kernel oopses.
  96
  97 config KERNEL_FTRACE
  98         bool "Compile the kernel with tracing support"
  99         depends on !TARGET_uml
 100         default n
 101
 102 config KERNEL_FTRACE_SYSCALLS
 103         bool "Trace system calls"
 104         depends on KERNEL_FTRACE
 105         default n
 106
 107 config KERNEL_ENABLE_DEFAULT_TRACERS
 108         bool "Trace process context switches and events"
 109         depends on KERNEL_FTRACE
 110         default n
 111
 112 config KERNEL_FUNCTION_TRACER
 113         bool "Function tracer"
 114         depends on KERNEL_FTRACE
 115         default n
 116
 117 config KERNEL_FUNCTION_GRAPH_TRACER
 118         bool "Function graph tracer"
 119         depends on KERNEL_FUNCTION_TRACER
 120         default n
 121
 122 config KERNEL_DYNAMIC_FTRACE
 123         bool "Enable/disable function tracing dynamically"
 124         depends on KERNEL_FUNCTION_TRACER
 125         default n
 126
 127 config KERNEL_FUNCTION_PROFILER
 128         bool "Function profiler"
 129         depends on KERNEL_FUNCTION_TRACER
 130         default n
 131
 132 config KERNEL_DEBUG_KERNEL
 133         bool
 134         default n
 135
 136 config KERNEL_DEBUG_INFO
 137         bool "Compile the kernel with debug information"
 138         default y if !SMALL_FLASH
 139         select KERNEL_DEBUG_KERNEL
 140         help
 141           This will compile your kernel and modules with debug information.
 142
 143 config KERNEL_DEBUG_LL_UART_NONE
 144         bool
 145         default n
 146         depends on arm
 147
 148 config KERNEL_DEBUG_LL
 149         bool
 150         default n
 151         depends on arm
 152         select KERNEL_DEBUG_LL_UART_NONE
 153         help
 154           ARM low level debugging.
 155
 156 config KERNEL_DYNAMIC_DEBUG
 157         bool "Compile the kernel with dynamic printk"
 158         select KERNEL_DEBUG_FS
 159         default n
 160         help
 161           Compiles debug level messages into the kernel, which would not
 162           otherwise be available at runtime. These messages can then be
 163           enabled/disabled based on various levels of scope - per source file,
 164           function, module, format string, and line number. This mechanism
 165           implicitly compiles in all pr_debug() and dev_dbg() calls, which
 166           enlarges the kernel text size by about 2%.
 167
 168 config KERNEL_EARLY_PRINTK
 169         bool "Compile the kernel with early printk"
 170         default y if TARGET_bcm53xx
 171         default n
 172         depends on arm
 173         select KERNEL_DEBUG_KERNEL
 174         select KERNEL_DEBUG_LL if arm
 175         help
 176           Compile the kernel with early printk support.  This is only useful for
 177           debugging purposes to send messages over the serial console in early boot.
 178           Enable this to debug early boot problems.
 179
 180 config KERNEL_KPROBES
 181         bool "Compile the kernel with kprobes support"
 182         default n
 183         select KERNEL_FTRACE
 184         select KERNEL_PERF_EVENTS
 185         help
 186           Compiles the kernel with KPROBES support, which allows you to trap
 187           at almost any kernel address and execute a callback function.
 188           register_kprobe() establishes a probepoint and specifies the
 189           callback. Kprobes is useful for kernel debugging, non-intrusive
 190           instrumentation and testing.
 191           If in doubt, say "N".
 192
 193 config KERNEL_KPROBE_EVENT
 194         bool
 195         default y if KERNEL_KPROBES
 196
 197 config KERNEL_KPROBE_EVENTS
 198         bool
 199         default y if KERNEL_KPROBES
 200
 201 config KERNEL_AIO
 202         bool "Compile the kernel with asynchronous IO support"
 203         default n
 204
 205 config KERNEL_FHANDLE
 206         bool "Compile the kernel with support for fhandle syscalls"
 207         default n
 208
 209 config KERNEL_FANOTIFY
 210         bool "Compile the kernel with modern file notification support"
 211         default n
 212
 213 config KERNEL_BLK_DEV_BSG
 214         bool "Compile the kernel with SCSI generic v4 support for any block device"
 215         default n
 216
 217 config KERNEL_MAGIC_SYSRQ
 218         bool "Compile the kernel with SysRq support"
 219         default y
 220
 221 config KERNEL_DEBUG_PINCTRL
 222         bool "Compile the kernel with pinctrl debugging"
 223         select KERNEL_DEBUG_KERNEL
 224
 225 config KERNEL_DEBUG_GPIO
 226         bool "Compile the kernel with gpio debugging"
 227         select KERNEL_DEBUG_KERNEL
 228
 229 config KERNEL_COREDUMP
 230         bool
 231
 232 config KERNEL_ELF_CORE
 233         bool "Enable process core dump support"
 234         select KERNEL_COREDUMP
 235         default y if !SMALL_FLASH
 236
 237 config KERNEL_PROVE_LOCKING
 238         bool "Enable kernel lock checking"
 239         select KERNEL_DEBUG_KERNEL
 240         default n
 241
 242 config KERNEL_PRINTK_TIME
 243         bool "Enable printk timestamps"
 244         default y
 245
 246 config KERNEL_SLUB_DEBUG
 247         bool
 248
 249 config KERNEL_SLUB_DEBUG_ON
 250         bool
 251
 252 config KERNEL_SLABINFO
 253         select KERNEL_SLUB_DEBUG
 254         select KERNEL_SLUB_DEBUG_ON
 255         bool "Enable /proc slab debug info"
 256
 257 config KERNEL_PROC_PAGE_MONITOR
 258         bool "Enable /proc page monitoring"
 259
 260 config KERNEL_RELAY
 261         bool
 262
 263 config KERNEL_KEXEC
 264         bool "Enable kexec support"
 265
 266 config KERNEL_PROC_VMCORE
 267         bool
 268
 269 config KERNEL_CRASH_DUMP
 270         depends on i386 || x86_64 || arm || armeb
 271         select KERNEL_KEXEC
 272         select KERNEL_PROC_VMCORE
 273         bool "Enable support for kexec crashdump"
 274         default y
 275
 276 config USE_RFKILL
 277         bool "Enable rfkill support"
 278         default RFKILL_SUPPORT
 279
 280 config USE_SPARSE
 281         bool "Enable sparse check during kernel build"
 282         default n
 283
 284 config KERNEL_DEVTMPFS
 285         bool "Compile the kernel with device tmpfs enabled"
 286         default n
 287         help
 288           devtmpfs is a simple, kernel-managed /dev filesystem. The kernel creates
 289           devices nodes for all registered devices to simplify boot, but leaves more
 290           complex tasks to userspace (e.g. udev).
 291
 292 if KERNEL_DEVTMPFS
 293
 294         config KERNEL_DEVTMPFS_MOUNT
 295                 bool "Automatically mount devtmpfs after root filesystem is mounted"
 296                 default n
 297
 298 endif
 299
 300 config KERNEL_KEYS
 301     bool "Enable kernel access key retention support"
 302     default n
 303
 304 config KERNEL_PERSISTENT_KEYRINGS
 305     bool "Enable kernel persistent keyrings"
 306     depends on KERNEL_KEYS
 307     default n
 308
 309 config KERNEL_BIG_KEYS
 310     bool "Enable large payload keys on kernel keyrings"
 311     depends on KERNEL_KEYS
 312     default n
 313
 314 config KERNEL_ENCRYPTED_KEYS
 315     tristate "Enable keys with encrypted payloads on kernel keyrings"
 316     depends on KERNEL_KEYS
 317     default n
 318
 319 #
 320 # CGROUP support symbols
 321 #
 322
 323 config KERNEL_CGROUPS
 324         bool "Enable kernel cgroups"
 325         default n
 326
 327 if KERNEL_CGROUPS
 328
 329         config KERNEL_CGROUP_DEBUG
 330                 bool "Example debug cgroup subsystem"
 331                 default n
 332                 help
 333                   This option enables a simple cgroup subsystem that
 334                   exports useful debugging information about the cgroups
 335                   framework.
 336
 337         config KERNEL_FREEZER
 338                 bool
 339                 default y if KERNEL_CGROUP_FREEZER
 340
 341         config KERNEL_CGROUP_FREEZER
 342                 bool "Freezer cgroup subsystem"
 343                 default y
 344                 help
 345                   Provides a way to freeze and unfreeze all tasks in a
 346                   cgroup.
 347
 348         config KERNEL_CGROUP_DEVICE
 349                 bool "Device controller for cgroups"
 350                 default y
 351                 help
 352                   Provides a cgroup implementing whitelists for devices which
 353                   a process in the cgroup can mknod or open.
 354
 355         config KERNEL_CGROUP_PIDS
 356                 bool "PIDs cgroup subsystem"
 357                 default y
 358                 help
 359                   Provides enforcement of process number limits in the scope of a
 360                   cgroup.
 361
 362         config KERNEL_CPUSETS
 363                 bool "Cpuset support"
 364                 default n
 365                 help
 366                   This option will let you create and manage CPUSETs which
 367                   allow dynamically partitioning a system into sets of CPUs and
 368                   Memory Nodes and assigning tasks to run only within those sets.
 369                   This is primarily useful on large SMP or NUMA systems.
 370
 371         config KERNEL_PROC_PID_CPUSET
 372                 bool "Include legacy /proc/<pid>/cpuset file"
 373                 default n
 374                 depends on KERNEL_CPUSETS
 375
 376         config KERNEL_CGROUP_CPUACCT
 377                 bool "Simple CPU accounting cgroup subsystem"
 378                 default n
 379                 help
 380                   Provides a simple Resource Controller for monitoring the
 381                   total CPU consumed by the tasks in a cgroup.
 382
 383         config KERNEL_RESOURCE_COUNTERS
 384                 bool "Resource counters"
 385                 default n
 386                 help
 387                   This option enables controller independent resource accounting
 388                   infrastructure that works with cgroups.
 389
 390         config KERNEL_MM_OWNER
 391                 bool
 392                 default y if KERNEL_MEMCG
 393
 394         config KERNEL_MEMCG
 395                 bool "Memory Resource Controller for Control Groups"
 396                 default n
 397                 depends on KERNEL_RESOURCE_COUNTERS || !LINUX_3_18
 398                 help
 399                   Provides a memory resource controller that manages both anonymous
 400                   memory and page cache. (See Documentation/cgroups/memory.txt)
 401
 402                   Note that setting this option increases fixed memory overhead
 403                   associated with each page of memory in the system. By this,
 404                   20(40)bytes/PAGE_SIZE on 32(64)bit system will be occupied by memory
 405                   usage tracking struct at boot. Total amount of this is printed out
 406                   at boot.
 407
 408                   Only enable when you're ok with these tradeoffs and really
 409                   sure you need the memory resource controller. Even when you enable
 410                   this, you can set "cgroup_disable=memory" at your boot option to
 411                   disable memory resource controller and you can avoid overheads
 412                   (but lose benefits of memory resource controller).
 413
 414                   This config option also selects MM_OWNER config option, which
 415                   could in turn add some fork/exit overhead.
 416
 417         config KERNEL_MEMCG_SWAP
 418                 bool "Memory Resource Controller Swap Extension"
 419                 default n
 420                 depends on KERNEL_MEMCG
 421                 help
 422                   Add swap management feature to memory resource controller. When you
 423                   enable this, you can limit mem+swap usage per cgroup. In other words,
 424                   when you disable this, memory resource controller has no cares to
 425                   usage of swap...a process can exhaust all of the swap. This extension
 426                   is useful when you want to avoid exhaustion swap but this itself
 427                   adds more overheads and consumes memory for remembering information.
 428                   Especially if you use 32bit system or small memory system, please
 429                   be careful about enabling this. When memory resource controller
 430                   is disabled by boot option, this will be automatically disabled and
 431                   there will be no overhead from this. Even when you set this config=y,
 432                   if boot option "swapaccount=0" is set, swap will not be accounted.
 433                   Now, memory usage of swap_cgroup is 2 bytes per entry. If swap page
 434                   size is 4096bytes, 512k per 1Gbytes of swap.
 435
 436         config KERNEL_MEMCG_SWAP_ENABLED
 437                 bool "Memory Resource Controller Swap Extension enabled by default"
 438                 default n
 439                 depends on KERNEL_MEMCG_SWAP
 440                 help
 441                   Memory Resource Controller Swap Extension comes with its price in
 442                   a bigger memory consumption. General purpose distribution kernels
 443                   which want to enable the feature but keep it disabled by default
 444                   and let the user enable it by swapaccount boot command line
 445                   parameter should have this option unselected.
 446
 447                   Those who want to have the feature enabled by default should
 448                   select this option (if, for some reason, they need to disable it,
 449                   then swapaccount=0 does the trick).
 450
 451
 452         config KERNEL_MEMCG_KMEM
 453                 bool "Memory Resource Controller Kernel Memory accounting (EXPERIMENTAL)"
 454                 default n
 455                 depends on KERNEL_MEMCG
 456                 help
 457                   The Kernel Memory extension for Memory Resource Controller can limit
 458                   the amount of memory used by kernel objects in the system. Those are
 459                   fundamentally different from the entities handled by the standard
 460                   Memory Controller, which are page-based, and can be swapped. Users of
 461                   the kmem extension can use it to guarantee that no group of processes
 462                   will ever exhaust kernel resources alone.
 463
 464         config KERNEL_CGROUP_PERF
 465                 bool "Enable perf_event per-cpu per-container group (cgroup) monitoring"
 466                 select KERNEL_PERF_EVENTS
 467                 default n
 468                 help
 469                   This option extends the per-cpu mode to restrict monitoring to
 470                   threads which belong to the cgroup specified and run on the
 471                   designated cpu.
 472
 473         menuconfig KERNEL_CGROUP_SCHED
 474                 bool "Group CPU scheduler"
 475                 default n
 476                 help
 477                   This feature lets CPU scheduler recognize task groups and control CPU
 478                   bandwidth allocation to such task groups. It uses cgroups to group
 479                   tasks.
 480
 481         if KERNEL_CGROUP_SCHED
 482
 483                 config KERNEL_FAIR_GROUP_SCHED
 484                         bool "Group scheduling for SCHED_OTHER"
 485                         default n
 486
 487                 config KERNEL_CFS_BANDWIDTH
 488                         bool "CPU bandwidth provisioning for FAIR_GROUP_SCHED"
 489                         default n
 490                         depends on KERNEL_FAIR_GROUP_SCHED
 491                         help
 492                           This option allows users to define CPU bandwidth rates (limits) for
 493                           tasks running within the fair group scheduler.  Groups with no limit
 494                           set are considered to be unconstrained and will run with no
 495                           restriction.
 496                           See tip/Documentation/scheduler/sched-bwc.txt for more information.
 497
 498                 config KERNEL_RT_GROUP_SCHED
 499                         bool "Group scheduling for SCHED_RR/FIFO"
 500                         default n
 501                         help
 502                           This feature lets you explicitly allocate real CPU bandwidth
 503                           to task groups. If enabled, it will also make it impossible to
 504                           schedule realtime tasks for non-root users until you allocate
 505                           realtime bandwidth for them.
 506
 507         endif
 508
 509         config KERNEL_BLK_CGROUP
 510                 bool "Block IO controller"
 511                 default y
 512                 help
 513                   Generic block IO controller cgroup interface. This is the common
 514                   cgroup interface which should be used by various IO controlling
 515                   policies.
 516
 517                   Currently, CFQ IO scheduler uses it to recognize task groups and
 518                   control disk bandwidth allocation (proportional time slice allocation)
 519                   to such task groups. It is also used by bio throttling logic in
 520                   block layer to implement upper limit in IO rates on a device.
 521
 522                   This option only enables generic Block IO controller infrastructure.
 523                   One needs to also enable actual IO controlling logic/policy. For
 524                   enabling proportional weight division of disk bandwidth in CFQ, set
 525                   CONFIG_CFQ_GROUP_IOSCHED=y; for enabling throttling policy, set
 526                   CONFIG_BLK_DEV_THROTTLING=y.
 527
 528         if KERNEL_BLK_CGROUP
 529
 530                 config KERNEL_CFQ_GROUP_IOSCHED
 531                         bool "Proportional weight of disk bandwidth in CFQ"
 532
 533                 config KERNEL_BLK_DEV_THROTTLING
 534                         bool "Enable throttling policy"
 535                         default y if TARGET_brcm2708
 536
 537                 config KERNEL_BLK_DEV_THROTTLING_LOW
 538                         bool "Block throttling .low limit interface support (EXPERIMENTAL)"
 539                         depends on KERNEL_BLK_DEV_THROTTLING
 540         endif
 541
 542         config KERNEL_DEBUG_BLK_CGROUP
 543                 bool "Enable Block IO controller debugging"
 544                 default n
 545                 depends on KERNEL_BLK_CGROUP
 546                 help
 547                   Enable some debugging help. Currently it exports additional stat
 548                   files in a cgroup which can be useful for debugging.
 549
 550         config KERNEL_NET_CLS_CGROUP
 551                 bool "Control Group Classifier"
 552                 default y
 553
 554         config KERNEL_NETPRIO_CGROUP
 555                 bool "Network priority cgroup"
 556                 default y
 557
 558 endif
 559
 560 #
 561 # Namespace support symbols
 562 #
 563
 564 config KERNEL_NAMESPACES
 565         bool "Enable kernel namespaces"
 566         default n
 567
 568 if KERNEL_NAMESPACES
 569
 570         config KERNEL_UTS_NS
 571                 bool "UTS namespace"
 572                 default y
 573                 help
 574                   In this namespace, tasks see different info provided
 575                   with the uname() system call.
 576
 577         config KERNEL_IPC_NS
 578                 bool "IPC namespace"
 579                 default y
 580                 help
 581                   In this namespace, tasks work with IPC ids which correspond to
 582                   different IPC objects in different namespaces.
 583
 584         config KERNEL_USER_NS
 585                 bool "User namespace (EXPERIMENTAL)"
 586                 default y
 587                 help
 588                   This allows containers, i.e. vservers, to use user namespaces
 589                   to provide different user info for different servers.
 590
 591         config KERNEL_PID_NS
 592                 bool "PID Namespaces"
 593                 default y
 594                 help
 595                   Support process id namespaces. This allows having multiple
 596                   processes with the same pid as long as they are in different
 597                   pid namespaces. This is a building block of containers.
 598
 599         config KERNEL_NET_NS
 600                 bool "Network namespace"
 601                 default y
 602                 help
 603                   Allow user space to create what appear to be multiple instances
 604                   of the network stack.
 605
 606 endif
 607
 608 #
 609 # LXC related symbols
 610 #
 611
 612 config KERNEL_LXC_MISC
 613         bool "Enable miscellaneous LXC related options"
 614         default n
 615
 616 if KERNEL_LXC_MISC
 617
 618         config KERNEL_DEVPTS_MULTIPLE_INSTANCES
 619                 bool "Support multiple instances of devpts"
 620                 default y
 621                 help
 622                   Enable support for multiple instances of devpts filesystem.
 623                   If you want to have isolated PTY namespaces (eg: in containers),
 624                   say Y here. Otherwise, say N. If enabled, each mount of devpts
 625                   filesystem with the '-o newinstance' option will create an
 626                   independent PTY namespace.
 627
 628         config KERNEL_POSIX_MQUEUE
 629                 bool "POSIX Message Queues"
 630                 default y
 631                 help
 632                   POSIX variant of message queues is a part of IPC. In POSIX message
 633                   queues every message has a priority which decides about succession
 634                   of receiving it by a process. If you want to compile and run
 635                   programs written e.g. for Solaris with use of its POSIX message
 636                   queues (functions mq_*) say Y here.
 637
 638                   POSIX message queues are visible as a filesystem called 'mqueue'
 639                   and can be mounted somewhere if you want to do filesystem
 640                   operations on message queues.
 641
 642 endif
 643
 644 config KERNEL_SECCOMP_FILTER
 645         bool
 646         default n
 647
 648 config KERNEL_SECCOMP
 649         bool "Enable seccomp support"
 650                 depends on !(TARGET_uml)
 651                 select KERNEL_SECCOMP_FILTER
 652                 default n
 653                 help
 654                   Build kernel with support for seccomp.
 655
 656 #
 657 # IPv4 configuration
 658 #
 659
 660 config KERNEL_IP_MROUTE
 661         bool "Enable IPv4 multicast routing"
 662         default y
 663         help
 664           Multicast routing requires a multicast routing daemon in
 665           addition to kernel support.
 666
 667 #
 668 # IPv6 configuration
 669 #
 670
 671 config KERNEL_IPV6
 672         def_bool IPV6
 673
 674 if KERNEL_IPV6
 675
 676         config KERNEL_IPV6_MULTIPLE_TABLES
 677                 def_bool y
 678
 679         config KERNEL_IPV6_SUBTREES
 680                 def_bool y
 681
 682         config KERNEL_IPV6_MROUTE
 683                 bool "Enable IPv6 multicast routing"
 684                 default y
 685                 help
 686                   Multicast routing requires a multicast routing daemon in
 687                   addition to kernel support.
 688
 689         config KERNEL_IPV6_PIMSM_V2
 690                 def_bool n
 691
 692 endif
 693
 694 #
 695 # NFS related symbols
 696 #
 697 config KERNEL_IP_PNP
 698         bool "Compile the kernel with rootfs on NFS"
 699         help
 700            If you want to make your kernel boot off a NFS server as root
 701            filesystem, select Y here.
 702
 703 if KERNEL_IP_PNP
 704
 705         config KERNEL_IP_PNP_DHCP
 706                 def_bool y
 707
 708         config KERNEL_IP_PNP_BOOTP
 709                 def_bool n
 710
 711         config KERNEL_IP_PNP_RARP
 712                 def_bool n
 713
 714         config KERNEL_NFS_FS
 715                 def_bool y
 716
 717         config KERNEL_NFS_V2
 718                 def_bool y
 719
 720         config KERNEL_NFS_V3
 721                 def_bool y
 722
 723         config KERNEL_ROOT_NFS
 724                 def_bool y
 725
 726 endif
 727
 728 menu "Filesystem ACL and attr support options"
 729         config USE_FS_ACL_ATTR
 730                 bool "Use filesystem ACL and attr support by default"
 731                 default n
 732                 help
 733                   Make using ACLs (e.g. POSIX ACL, NFSv4 ACL) the default
 734                   for kernel and packages, except tmpfs, flash filesystems,
 735                   and old NFS.  Also enable userspace extended attribute support
 736                   by default.  (OpenWrt already has an expection it will be
 737                   present in the kernel).
 738
 739         config KERNEL_FS_POSIX_ACL
 740                 bool "Enable POSIX ACL support"
 741                 default y if USE_FS_ACL_ATTR
 742
 743         config KERNEL_BTRFS_FS_POSIX_ACL
 744                 bool "Enable POSIX ACL for BtrFS Filesystems"
 745                 select KERNEL_FS_POSIX_ACL
 746                 default y if USE_FS_ACL_ATTR
 747
 748         config KERNEL_EXT4_FS_POSIX_ACL
 749                 bool "Enable POSIX ACL for Ext4 Filesystems"
 750                 select KERNEL_FS_POSIX_ACL
 751                 default y if USE_FS_ACL_ATTR
 752
 753         config KERNEL_F2FS_FS_POSIX_ACL
 754                 bool "Enable POSIX ACL for F2FS Filesystems"
 755                 select KERNEL_FS_POSIX_ACL
 756                 default n
 757
 758         config KERNEL_JFFS2_FS_POSIX_ACL
 759                 bool "Enable POSIX ACL for JFFS2 Filesystems"
 760                 select KERNEL_FS_POSIX_ACL
 761                 default n
 762
 763         config KERNEL_TMPFS_POSIX_ACL
 764                 bool "Enable POSIX ACL for TMPFS Filesystems"
 765                 select KERNEL_FS_POSIX_ACL
 766                 default n
 767
 768         config KERNEL_CIFS_ACL
 769                 bool "Enable CIFS ACLs"
 770                 select KERNEL_FS_POSIX_ACL
 771                 default y if USE_FS_ACL_ATTR
 772
 773         config KERNEL_HFS_FS_POSIX_ACL
 774                 bool "Enable POSIX ACL for HFS Filesystems"
 775                 select KERNEL_FS_POSIX_ACL
 776                 default y if USE_FS_ACL_ATTR
 777
 778         config KERNEL_HFSPLUG_FS_POSIX_ACL
 779                 bool "Enable POSIX ACL for HFS+ Filesystems"
 780                 select KERNEL_FS_POSIX_ACL
 781                 default y if USE_FS_ACL_ATTR
 782
 783         config KERNEL_NFS_ACL_SUPPORT
 784                 bool "Enable ACLs for NFS"
 785                 default y if USE_FS_ACL_ATTR
 786
 787         config KERNEL_NFS_V3_ACL_SUPPORT
 788                 bool "Enable ACLs for NFSv3"
 789                 default n
 790
 791         config KERNEL_NFSD_V2_ACL_SUPPORT
 792                 bool "Enable ACLs for NFSDv2"
 793                 default n
 794
 795         config KERNEL_NFSD_V3_ACL_SUPPORT
 796                 bool "Enable ACLs for NFSDv3"
 797                 default n
 798
 799         config KERNEL_REISER_FS_POSIX_ACL
 800                 bool "Enable POSIX ACLs for ReiserFS"
 801                 select KERNEL_FS_POSIX_ACL
 802                 default y if USE_FS_ACL_ATTR
 803
 804         config KERNEL_XFS_POSIX_ACL
 805                 bool "Enable POSIX ACLs for XFS"
 806                 select KERNEL_FS_POSIX_ACL
 807                 default y if USE_FS_ACL_ATTR
 808
 809         config KERNEL_JFS_POSIX_ACL
 810                 bool "Enable POSIX ACLs for JFS"
 811                 select KERNEL_FS_POSIX_ACL
 812                 default y if USE_FS_ACL_ATTR
 813
 814 endmenu
 815
 816 config KERNEL_DEVMEM
 817         bool "/dev/mem virtual device support"
 818         help
 819           Say Y here if you want to support the /dev/mem device.
 820           The /dev/mem device is used to access areas of physical
 821           memory.
 822
 823 config KERNEL_DEVKMEM
 824         bool "/dev/kmem virtual device support"
 825         help
 826           Say Y here if you want to support the /dev/kmem device. The
 827           /dev/kmem device is rarely used, but can be used for certain
 828           kind of kernel debugging operations.
 829
 830 config KERNEL_SQUASHFS_FRAGMENT_CACHE_SIZE
 831         int "Number of squashfs fragments cached"
 832         default 2 if (SMALL_FLASH && !LOW_MEMORY_FOOTPRINT)
 833         default 3
 834
 835 #
 836 # compile optimiziation setting
 837 #
 838 choice
 839         prompt "Compiler optimization level"
 840         default KERNEL_CC_OPTIMIZE_FOR_SIZE if SMALL_FLASH
 841
 842 config KERNEL_CC_OPTIMIZE_FOR_PERFORMANCE
 843         bool "Optimize for performance"
 844         help
 845           This is the default optimization level for the kernel, building
 846           with the "-O2" compiler flag for best performance and most
 847           helpful compile-time warnings.
 848
 849 config KERNEL_CC_OPTIMIZE_FOR_SIZE
 850         bool "Optimize for size"
 851         help
 852           Enabling this option will pass "-Os" instead of "-O2" to
 853           your compiler resulting in a smaller kernel.
 854
 855 endchoice