NOTES revision 152865
1# 2# NOTES -- Lines that can be cut/pasted into kernel and hints configs. 3# 4# This file contains machine dependent kernel configuration notes. For 5# machine independent notes, look in /sys/conf/NOTES. 6# 7# $FreeBSD: head/sys/pc98/conf/NOTES 152865 2005-11-27 23:17:00Z ru $ 8# 9 10options PC98 11 12# 13# We want LINT to cover profiling as well. 14profile 2 15 16 17##################################################################### 18# SMP OPTIONS: 19# 20# The apic device enables the use of the I/O APIC for interrupt delivery. 21# The apic device can be used in both UP and SMP kernels, but is required 22# for SMP kernels. Thus, the apic device is not strictly an SMP option, 23# but it is a prerequisite for SMP. 24# 25 26# Mandatory: 27device apic # I/O apic 28 29# 30# Watchdog routines. 31# 32options MP_WATCHDOG 33 34# Debugging options. 35# 36options STOP_NMI # Stop CPUS using NMI instead of IPI 37 38 39 40##################################################################### 41# CPU OPTIONS 42 43# 44# You must specify at least one CPU (the one you intend to run on); 45# deleting the specification for CPUs you don't need to use may make 46# parts of the system run faster. 47# 48cpu I486_CPU 49cpu I586_CPU # aka Pentium(tm) 50cpu I686_CPU # aka Pentium Pro(tm) 51 52# 53# Options for CPU features. 54# 55# CPU_BLUELIGHTNING_3X enables triple-clock mode on IBM Blue Lightning 56# CPU if CPU supports it. The default is double-clock mode on 57# BlueLightning CPU box. 58# 59# CPU_BLUELIGHTNING_FPU_OP_CACHE enables FPU operand cache on IBM 60# BlueLightning CPU. It works only with Cyrix FPU, and this option 61# should not be used with Intel FPU. 62# 63# CPU_BTB_EN enables branch target buffer on Cyrix 5x86 (NOTE 1). 64# 65# CPU_CYRIX_NO_LOCK enables weak locking for the entire address space 66# of Cyrix 6x86 and 6x86MX CPUs by setting the NO_LOCK bit of CCR1. 67# Otherwise, the NO_LOCK bit of CCR1 is cleared. (NOTE 3) 68# 69# CPU_DIRECT_MAPPED_CACHE sets L1 cache of Cyrix 486DLC CPU in direct 70# mapped mode. Default is 2-way set associative mode. 71# 72# CPU_DISABLE_5X86_LSSER disables load store serialize (i.e., enables 73# reorder). This option should not be used if you use memory mapped 74# I/O device(s). 75# 76# CPU_DISABLE_CMPXCHG disables the CMPXCHG instruction on > i386 IA32 77# machines. VmWare 3.x seems to emulate this instruction poorly, causing 78# the guest OS to run very slowly. This problem appears to be fixed in 79# VmWare 4.x, at least in version 4.5.2, so that enabling this option with 80# VmWare 4.x will result in locking operations to be 20-30 times slower. 81# Enabling this with an SMP kernel will cause the kernel to be unusable. 82# 83# CPU_DISABLE_SSE explicitly prevents I686_CPU from turning on SSE. 84# 85# CPU_FASTER_5X86_FPU enables faster FPU exception handler. 86# 87# CPU_I486_ON_386 enables CPU cache on i486 based CPU upgrade products 88# for i386 machines. 89# 90# CPU_IORT defines I/O clock delay time (NOTE 1). Default values of 91# I/O clock delay time on Cyrix 5x86 and 6x86 are 0 and 7,respectively 92# (no clock delay). 93# 94# CPU_L2_LATENCY specifies the L2 cache latency value. This option is used 95# only when CPU_PPRO2CELERON is defined and Mendocino Celeron is detected. 96# The default value is 5. 97# 98# CPU_LOOP_EN prevents flushing the prefetch buffer if the destination 99# of a jump is already present in the prefetch buffer on Cyrix 5x86(NOTE 100# 1). 101# 102# CPU_PPRO2CELERON enables L2 cache of Mendocino Celeron CPUs. This option 103# is useful when you use Socket 8 to Socket 370 converter, because most Pentium 104# Pro BIOSs do not enable L2 cache of Mendocino Celeron CPUs. 105# 106# CPU_RSTK_EN enables return stack on Cyrix 5x86 (NOTE 1). 107# 108# CPU_SUSP_HLT enables suspend on HALT. If this option is set, CPU 109# enters suspend mode following execution of HALT instruction. 110# 111# CPU_UPGRADE_HW_CACHE eliminates unneeded cache flush instruction(s). 112# 113# CPU_WT_ALLOC enables write allocation on Cyrix 6x86/6x86MX and AMD 114# K5/K6/K6-2 CPUs. 115# 116# CYRIX_CACHE_WORKS enables CPU cache on Cyrix 486 CPUs with cache 117# flush at hold state. 118# 119# CYRIX_CACHE_REALLY_WORKS enables (1) CPU cache on Cyrix 486 CPUs 120# without cache flush at hold state, and (2) write-back CPU cache on 121# Cyrix 6x86 whose revision < 2.7 (NOTE 2). 122# 123# NO_F00F_HACK disables the hack that prevents Pentiums (and ONLY 124# Pentiums) from locking up when a LOCK CMPXCHG8B instruction is 125# executed. This option is only needed if I586_CPU is also defined, 126# and should be included for any non-Pentium CPU that defines it. 127# 128# NO_MEMORY_HOLE is an optimisation for systems with AMD K6 processors 129# which indicates that the 15-16MB range is *definitely* not being 130# occupied by an ISA memory hole. 131# 132# NOTE 1: The options, CPU_BTB_EN, CPU_LOOP_EN, CPU_IORT, 133# CPU_LOOP_EN and CPU_RSTK_EN should not be used because of CPU bugs. 134# These options may crash your system. 135# 136# NOTE 2: If CYRIX_CACHE_REALLY_WORKS is not set, CPU cache is enabled 137# in write-through mode when revision < 2.7. If revision of Cyrix 138# 6x86 >= 2.7, CPU cache is always enabled in write-back mode. 139# 140# NOTE 3: This option may cause failures for software that requires 141# locked cycles in order to operate correctly. 142# 143options CPU_BLUELIGHTNING_3X 144options CPU_BLUELIGHTNING_FPU_OP_CACHE 145options CPU_BTB_EN 146options CPU_DIRECT_MAPPED_CACHE 147options CPU_DISABLE_5X86_LSSER 148options CPU_DISABLE_CMPXCHG 149#options CPU_DISABLE_SSE 150options CPU_FASTER_5X86_FPU 151options CPU_I486_ON_386 152options CPU_IORT 153options CPU_L2_LATENCY=5 154options CPU_LOOP_EN 155options CPU_PPRO2CELERON 156options CPU_RSTK_EN 157options CPU_SUSP_HLT 158options CPU_UPGRADE_HW_CACHE 159options CPU_WT_ALLOC 160options CYRIX_CACHE_WORKS 161options CYRIX_CACHE_REALLY_WORKS 162#options NO_F00F_HACK 163 164# Debug options 165options NPX_DEBUG # enable npx debugging 166 167# 168# PERFMON causes the driver for Pentium/Pentium Pro performance counters 169# to be compiled. See perfmon(4) for more information. 170# 171options PERFMON 172 173 174##################################################################### 175# NETWORKING OPTIONS 176 177# 178# DEVICE_POLLING adds support for mixed interrupt-polling handling 179# of network device drivers, which has significant benefits in terms 180# of robustness to overloads and responsivity, as well as permitting 181# accurate scheduling of the CPU time between kernel network processing 182# and other activities. The drawback is a moderate (up to 1/HZ seconds) 183# potential increase in response times. 184# It is strongly recommended to use HZ=1000 or 2000 with DEVICE_POLLING 185# to achieve smoother behaviour. 186# Additionally, you can enable/disable polling at runtime with help of 187# the ifconfig(8) utility, and select the CPU fraction reserved to 188# userland with the sysctl variable kern.polling.user_frac 189# (default 50, range 0..100). 190# 191# Not all device drivers support this mode of operation at the time of 192# this writing. See polling(4) for more details. 193 194options DEVICE_POLLING 195 196 197##################################################################### 198# CLOCK OPTIONS 199 200# The following options are used for debugging clock behavior only, and 201# should not be used for production systems. 202 203# CLK_CALIBRATION_LOOP causes clock calibration to be run in a loop at 204# startup until the user presses a key. (The i8254 clock is always 205# calibrated relative to the RTC (mc146818a) and this option causes the 206# calibration to be repeated.) 207options CLK_CALIBRATION_LOOP 208 209# CLK_USE_I8254_CALIBRATION causes the calibrated frequency of the i8254 210# clock to actually be used. 211options CLK_USE_I8254_CALIBRATION 212 213 214##################################################################### 215# MISCELLANEOUS DEVICES AND OPTIONS 216 217device speaker #Play IBM BASIC-style noises out your speaker 218hint.speaker.0.at="isa" 219hint.speaker.0.port="0x35" 220device gzip #Exec gzipped a.out's. REQUIRES COMPAT_AOUT! 221device apm_saver # Requires APM 222 223 224##################################################################### 225# HARDWARE BUS CONFIGURATION 226 227# 228# ISA bus 229# 230device isa 231 232# 233# Options for `isa': 234# 235# AUTO_EOI_1 enables the `automatic EOI' feature for the master 8259A 236# interrupt controller. This saves about 0.7-1.25 usec for each interrupt. 237# This option breaks suspend/resume on some portables. 238# 239# MAXMEM specifies the amount of RAM on the machine; if this is not 240# specified, FreeBSD will first read the amount of memory from the CMOS 241# RAM, so the amount of memory will initially be limited to 64MB or 16MB 242# depending on the BIOS. If the BIOS reports 64MB, a memory probe will 243# then attempt to detect the installed amount of RAM. If this probe 244# fails to detect >64MB RAM you will have to use the MAXMEM option. 245# The amount is in kilobytes, so for a machine with 128MB of RAM, it would 246# be 131072 (128 * 1024). 247# 248# BROKEN_KEYBOARD_RESET disables the use of the keyboard controller to 249# reset the CPU for reboot. This is needed on some systems with broken 250# keyboard controllers. 251 252options AUTO_EOI_1 253 254options MAXMEM=(128*1024) 255#options BROKEN_KEYBOARD_RESET 256options EPSON_BOUNCEDMA 257options EPSON_MEMWIN 258 259# 260# PCI bus & PCI options: 261# 262device pci 263 264# 265# AGP GART support 266device agp 267 268 269##################################################################### 270# HARDWARE DEVICE CONFIGURATION 271 272# PC98 keyboard 273device pckbd 274hint.pckbd.0.at="isa" 275hint.pckbd.0.port="0x041" 276hint.pckbd.0.irq="1" 277 278# These options are valid for other keyboard drivers as well. 279options KBD_DISABLE_KEYMAP_LOAD # refuse to load a keymap 280options KBD_INSTALL_CDEV # install a CDEV entry in /dev 281 282# GDC screen 283device gdc 284hint.gdc.0.at="isa" 285options LINE30 286 287# 288# The Numeric Processing eXtension driver. This is non-optional. 289device npx 290 291# 292# `flags' for npx0: 293# 0x01 don't use the npx registers to optimize bcopy. 294# 0x02 don't use the npx registers to optimize bzero. 295# 0x04 don't use the npx registers to optimize copyin or copyout. 296# The npx registers are normally used to optimize copying and zeroing when 297# all of the following conditions are satisfied: 298# I586_CPU is an option 299# the cpu is an i586 (perhaps not a Pentium) 300# the probe for npx0 succeeds 301# INT 16 exception handling works. 302# Then copying and zeroing using the npx registers is normally 30-100% faster. 303# The flags can be used to control cases where it doesn't work or is slower. 304# Setting them at boot time using hints works right (the optimizations 305# are not used until later in the bootstrap when npx0 is attached). 306# Flag 0x08 automatically disables the i586 optimized routines. 307# 308 309# 310# Optional devices: 311# 312 313# 3Dfx Voodoo Graphics, Voodoo II /dev/3dfx CDEV support. This will create 314# the /dev/3dfx0 device to work with glide implementations. This should get 315# linked to /dev/3dfx and /dev/voodoo. Note that this is not the same as 316# the tdfx DRI module from XFree86 and is completely unrelated. 317# 318# To enable Linuxulator support, one must also include COMPAT_LINUX in the 319# config as well, or you will not have the dependencies. The other option 320# is to load both as modules. 321 322device tdfx # Enable 3Dfx Voodoo support 323options TDFX_LINUX # Enable Linuxulator support 324 325# Direct Rendering modules for 3D acceleration. 326device drm # DRM core module required by DRM drivers 327device mach64drm # ATI Rage Pro, Rage Mobility P/M, Rage XL 328device mgadrm # AGP Matrox G200, G400, G450, G550 329device r128drm # ATI Rage 128 330device radeondrm # ATI Radeon 331device sisdrm # SiS 300/305, 540, 630 332device tdfxdrm # 3dfx Voodoo 3/4/5 and Banshee 333options DRM_DEBUG # Include debug printfs (slow) 334 335# 336# Bus mouse 337# 338device mse 339hint.mse.0.at="isa" 340hint.mse.0.port="0x7fd9" 341hint.mse.0.irq="13" 342 343# 344# Network interfaces: 345# 346 347# ar: Arnet SYNC/570i hdlc sync 2/4 port V.35/X.21 serial driver 348# (requires sppp) 349# cp: Cronyx Tau-PCI sync single/dual/four port 350# V.35/RS-232/RS-530/RS-449/X.21/G.703/E1/E3/T3/STS-1 351# serial adaptor (requires sppp (default), or NETGRAPH if 352# NETGRAPH_CRONYX is configured) 353# ed: Western Digital and SMC 80xx; Novell NE1000 and NE2000; 3Com 3C503 354# HP PC Lan+, various PC Card devices 355# (requires miibus) 356# ie: AT&T StarLAN 10 and EN100; 3Com 3C507; unknown NI5210; 357# Intel EtherExpress 358# lnc: Lance/PCnet cards (Isolan, Novell NE2100, NE32-VL, AMD Am7990 and 359# Am79C960) 360# oltr: Olicom ISA token-ring adapters OC-3115, OC-3117, OC-3118 and OC-3133. 361# Olicom PCI token-ring adapters OC-3136, OC-3137, OC-3139, OC-3140, 362# OC-3141, OC-3540 and OC-3250. 363# sbni: Granch SBNI12-xx ISA and PCI adapters 364# sr: RISCom/N2 hdlc sync 1/2 port V.35/X.21 serial driver (requires sppp) 365 366# Order for ISA/EISA devices is important here 367 368device ar 369device cp 370device ed 371hint.ed.0.at="isa" 372hint.ed.0.port="0x280" 373hint.ed.0.irq="5" 374hint.ed.0.maddr="0xd8000" 375device ie # Hints only required for Starlan 376hint.ie.2.at="isa" 377hint.ie.2.port="0x300" 378hint.ie.2.irq="5" 379hint.ie.2.maddr="0xd0000" 380device lnc 381hint.lnc.0.at="isa" 382hint.lnc.0.port="0x280" 383hint.lnc.0.irq="10" 384hint.lnc.0.drq="0" 385device sbni 386hint.sbni.0.at="isa" 387hint.sbni.0.port="0x210" 388hint.sbni.0.irq="0xefdead" 389hint.sbni.0.flags="0" 390device snc 391hint.snc.0.at="isa" 392hint.snc.0.port="0x888" 393hint.snc.0.irq="6" 394hint.snc.0.maddr="0xc0000" 395device sr 396device oltr 397 398# 399# SCSI host adapters: 400# 401# ct: WD33C93[ABC] based SCSI host adapters. 402# ncv: NCR 53C500 based SCSI host adapters. 403# nsp: Workbit Ninja SCSI-3 based PC Card SCSI host adapters. 404# stg: TMC 18C30, 18C50 based SCSI host adapters. 405 406device ct 407hint.ct.0.at="isa" 408device ncv 409device nsp 410device stg 411 412# 413# SafeNet crypto driver: can be moved to the MI NOTES as soon as 414# it's tested on a big-endian machine 415# 416device safe # SafeNet 1141 417options SAFE_DEBUG # enable debugging support: hw.safe.debug 418options SAFE_RNDTEST # enable rndtest support 419 420##################################################################### 421 422# 423# Miscellaneous hardware: 424# 425# apm: Laptop Advanced Power Management (experimental) 426# pmtimer: Timer device driver for power management events (APM or ACPI) 427# cy: Cyclades serial driver 428# digi: Digiboard driver 429 430# Notes on APM 431# The flags takes the following meaning for apm0: 432# 0x0020 Statclock is broken. 433 434device apm 435hint.apm.0.flags="0x20" 436device canbus 437device canbepm 438device cy 439options CY_PCI_FASTINTR # Use with cy_pci unless irq is shared 440device digi 441# BIOS & FEP/OS components of device digi. 442device digi_CX 443device digi_CX_PCI 444device digi_EPCX 445device digi_EPCX_PCI 446device digi_Xe 447device digi_Xem 448device digi_Xr 449device olpt 450hint.olpt.0.at="isa" 451hint.olpt.0.port="0x040" 452device pmc 453hint.pmc.0.at="isa" 454hint.pmc.0.port="0x8f0" 455device pmtimer # Adjust system timer at wakeup time 456 457# 458# Laptop/Notebook options: 459# 460# See also: 461# apm under `Miscellaneous hardware' 462# above. 463 464# For older notebooks that signal a powerfail condition (external 465# power supply dropped, or battery state low) by issuing an NMI: 466 467options POWERFAIL_NMI # make it beep instead of panicing 468 469#--------------------------------------------------------------------------- 470# ISDN4BSD 471# 472# See /usr/share/examples/isdn/ROADMAP for an introduction to isdn4bsd. 473# 474# i4b passive ISDN cards support contains the following hardware drivers: 475# 476# isic - Siemens/Infineon ISDN ISAC/HSCX/IPAC chipset driver 477# iwic - Winbond W6692 PCI bus ISDN S/T interface controller 478# ifpi - AVM Fritz!Card PCI driver 479# ifpi2 - AVM Fritz!Card PCI version 2 driver 480# ihfc - Cologne Chip HFC ISA/ISA-PnP chipset driver 481# ifpnp - AVM Fritz!Card PnP driver 482# itjc - Siemens ISAC / TJNet Tiger300/320 chipset 483# 484# i4b active ISDN cards support contains the following hardware drivers: 485# 486# iavc - AVM B1 PCI, AVM B1 ISA, AVM T1 487# 488# Note that the ``options'' (if given) and ``device'' lines must BOTH 489# be uncommented to enable support for a given card ! 490# 491# In addition to a hardware driver (and probably an option) the mandatory 492# ISDN protocol stack devices and the mandatory support device must be 493# enabled as well as one or more devices from the optional devices section. 494# 495#--------------------------------------------------------------------------- 496# isic driver (Siemens/Infineon chipsets) 497# 498device isic 499# 500# PCI bus Cards: 501# -------------- 502# 503# ELSA MicroLink ISDN/PCI (same as ELSA QuickStep 1000pro PCI) 504options ELSA_QS1PCI 505# 506#--------------------------------------------------------------------------- 507# ifpnp driver for AVM Fritz!Card PnP 508# 509# AVM Fritz!Card PnP 510device ifpnp 511# 512#--------------------------------------------------------------------------- 513# ihfc driver for Cologne Chip ISA chipsets (experimental!) 514# 515# Teles 16.3c ISA PnP 516# AcerISDN P10 ISA PnP 517# TELEINT ISDN SPEED No.1 518device ihfc 519# 520#--------------------------------------------------------------------------- 521# ifpi driver for AVM Fritz!Card PCI 522# 523# AVM Fritz!Card PCI 524device ifpi 525# 526#--------------------------------------------------------------------------- 527# ifpi2 driver for AVM Fritz!Card PCI version 2 528# 529# AVM Fritz!Card PCI version 2 530device ifpi2 531# 532#--------------------------------------------------------------------------- 533# iwic driver for Winbond W6692 chipset 534# 535# ASUSCOM P-IN100-ST-D (and other Winbond W6692 based cards) 536device iwic 537# 538#--------------------------------------------------------------------------- 539# itjc driver for Siemens ISAC / TJNet Tiger300/320 chipset 540# 541# Traverse Technologies NETjet-S 542# Teles PCI-TJ 543device itjc 544# 545#--------------------------------------------------------------------------- 546# iavc driver (AVM active cards, needs i4bcapi driver!) 547# 548device iavc 549# 550#--------------------------------------------------------------------------- 551# ISDN Protocol Stack - mandatory for all hardware drivers 552# 553# Q.921 / layer 2 - i4b passive cards D channel handling 554device i4bq921 555# 556# Q.931 / layer 3 - i4b passive cards D channel handling 557device i4bq931 558# 559# layer 4 - i4b common passive and active card handling 560device i4b 561# 562#--------------------------------------------------------------------------- 563# ISDN devices - mandatory for all hardware drivers 564# 565# userland driver to do ISDN tracing (for passive cards only) 566device i4btrc 567options NI4BTRC=4 568# 569# userland driver to control the whole thing 570device i4bctl 571# 572#--------------------------------------------------------------------------- 573# ISDN devices - optional 574# 575# userland driver for access to raw B channel 576device i4brbch 577options NI4BRBCH=4 578# 579# userland driver for telephony 580device i4btel 581options NI4BTEL=2 582# 583# network driver for IP over raw HDLC ISDN 584device i4bipr 585options NI4BIPR=4 586# enable VJ header compression detection for ipr i/f 587options IPR_VJ 588# enable logging of the first n IP packets to isdnd (n=32 here) 589options IPR_LOG=32 590# 591# network driver for sync PPP over ISDN; requires an equivalent 592# number of sppp device to be configured 593device i4bisppp 594options NI4BISPPP=4 595# 596# B-channel interface to the netgraph subsystem 597device i4bing 598options NI4BING=2 599# 600# CAPI driver needed for active ISDN cards (see iavc driver above) 601device i4bcapi 602# 603#--------------------------------------------------------------------------- 604 605# 606# Set the number of PV entries per process. Increasing this can 607# stop panics related to heavy use of shared memory. However, that can 608# (combined with large amounts of physical memory) cause panics at 609# boot time due the kernel running out of VM space. 610# 611# If you're tweaking this, you might also want to increase the sysctls 612# "vm.v_free_min", "vm.v_free_reserved", and "vm.v_free_target". 613# 614# The value below is the one more than the default. 615# 616options PMAP_SHPGPERPROC=201 617 618# 619# Change the size of the kernel virtual address space. Due to 620# constraints in loader(8) on i386, this must be a multiple of 4. 621# 256 = 1 GB of kernel address space. Increasing this also causes 622# a reduction of the address space in user processes. 512 splits 623# the 4GB cpu address space in half (2GB user, 2GB kernel). 624# 625options KVA_PAGES=260 626 627 628##################################################################### 629# ABI Emulation 630 631# Enable iBCS2 runtime support for SCO and ISC binaries 632options IBCS2 633 634# Emulate spx device for client side of SVR3 local X interface 635options SPX_HACK 636 637# Enable Linux ABI emulation 638options COMPAT_LINUX 639 640# Enable i386 a.out binary support 641options COMPAT_AOUT 642 643# Enable the linux-like proc filesystem support (requires COMPAT_LINUX 644# and PSEUDOFS) 645options LINPROCFS 646 647# 648# SysVR4 ABI emulation 649# 650# The svr4 ABI emulator can be statically compiled into the kernel or loaded as 651# a KLD module. 652# The STREAMS network emulation code can also be compiled statically or as a 653# module. If loaded as a module, it must be loaded before the svr4 module 654# (the /usr/sbin/svr4 script does this for you). If compiling statically, 655# the `streams' device must be configured into any kernel which also 656# specifies COMPAT_SVR4. It is possible to have a statically-configured 657# STREAMS device and a dynamically loadable svr4 emulator; the /usr/sbin/svr4 658# script understands that it doesn't need to load the `streams' module under 659# those circumstances. 660# Caveat: At this time, `options KTRACE' is required for the svr4 emulator 661# (whether static or dynamic). 662# 663options COMPAT_SVR4 # build emulator statically 664options DEBUG_SVR4 # enable verbose debugging 665device streams # STREAMS network driver (required for svr4). 666 667 668##################################################################### 669# VM OPTIONS 670 671# Disable the 4 MByte page PSE CPU feature. The PSE feature allows the 672# kernel to use 4 MByte pages to map the kernel instead of 4k pages. 673# This saves on the amount of memory needed for page tables needed to 674# map the kernel. You should only disable this feature as a temporary 675# workaround if you are having problems with it enabled. 676# 677#options DISABLE_PSE 678 679# Disable the global pages PGE CPU feature. The PGE feature allows pages 680# to be marked with the PG_G bit. TLB entries for these pages are not 681# flushed from the cache when %cr3 is reloaded. This can make context 682# switches less expensive. You should only disable this feature as a 683# temporary workaround if you are having problems with it enabled. 684# 685#options DISABLE_PG_G 686 687# KSTACK_PAGES is the number of memory pages to assign to the kernel 688# stack of each thread. 689 690options KSTACK_PAGES=3 691 692##################################################################### 693 694# More undocumented options for linting. 695# Note that documenting these are not considered an affront. 696 697options FB_INSTALL_CDEV # install a CDEV entry in /dev 698 699# PECOFF module (Win32 Execution Format) 700options PECOFF_SUPPORT 701options PECOFF_DEBUG 702 703options I4B_SMP_WORKAROUND 704options I586_PMC_GUPROF=0x70000 705options KBDIO_DEBUG=2 706options KBD_MAXRETRY=4 707options KBD_MAXWAIT=6 708options KBD_RESETDELAY=201 709 710options TIMER_FREQ=((14318182+6)/12) 711 712options VM_KMEM_SIZE 713options VM_KMEM_SIZE_MAX 714options VM_KMEM_SIZE_SCALE 715 716 717# The I/O device 718device io 719 720 721##################################################################### 722# Devices we don't want to deal with 723 724nodevice atkbdc 725nodevice atkbd 726nodevice psm 727nodevice vga 728nodevice bt 729nodevice adw 730nodevice aha 731nodevice ahb 732nodevice ahd 733nodevice mpt 734nodevice trm 735nodevice wds 736nodevice asr 737nodevice dpt 738nodevice ciss 739nodevice iir 740nodevice mly 741nodevice ida # Compaq Smart RAID 742nodevice mlx # Mylex DAC960 743nodevice amr # AMI MegaRAID 744nodevice twe # 3ware ATA RAID 745nodevice ataraid 746nodevice cm 747nodevice cs 748nodevice ex 749nodevice fea 750nodevice intpm 751nodevice alpm 752nodevice ichsmb 753nodevice viapm 754nodevice amdpm 755nodevice nfpm 756 757 758##################################################################### 759# Options we don't want to deal with 760 761nooption VGA_DEBUG 762nooption VGA_WIDTH90 763nooption VGA_SLOW_IOACCESS 764nooption VGA_ALT_SEQACCESS 765nooption PSM_RESETAFTERSUSPEND 766nooption PSM_HOOKRESUME 767nooption ATKBD_DFLT_KEYMAP 768nooption AHD_DEBUG 769nooption AHD_DEBUG_OPTS 770nooption AHD_REG_PRETTY_PRINT 771nooption ADW_ALLOW_MEMIO 772nooption DPT_LOST_IRQ 773nooption DPT_RESET_HBA 774nooption DPT_TIMEOUT_FACTOR 775nooption AAC_DEBUG 776nooption ACPI_MAX_THREADS 777 778 779##################################################################### 780# Make options we don't want to deal with 781 782nomakeoption ATKBD_DFLT_KEYMAP 783