NOTES revision 151634
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 151634 2005-10-24 21:04:19Z jhb $ 8# 9 10# 11# This directive is mandatory; it defines the architecture to be 12# configured for; in this case, the 386 family based PC-98 and 13# compatibles. 14# 15machine pc98 i386 16options PC98 17 18# 19# We want LINT to cover profiling as well. 20profile 2 21 22 23##################################################################### 24# SMP OPTIONS: 25# 26# The apic device enables the use of the I/O APIC for interrupt delivery. 27# The apic device can be used in both UP and SMP kernels, but is required 28# for SMP kernels. Thus, the apic device is not strictly an SMP option, 29# but it is a prerequisite for SMP. 30# 31 32# Mandatory: 33device apic # I/O apic 34 35# 36# Watchdog routines. 37# 38options MP_WATCHDOG 39 40# Debugging options. 41# 42options STOP_NMI # Stop CPUS using NMI instead of IPI 43 44 45 46##################################################################### 47# CPU OPTIONS 48 49# 50# You must specify at least one CPU (the one you intend to run on); 51# deleting the specification for CPUs you don't need to use may make 52# parts of the system run faster. 53# 54cpu I486_CPU 55cpu I586_CPU # aka Pentium(tm) 56cpu I686_CPU # aka Pentium Pro(tm) 57 58# 59# Options for CPU features. 60# 61# CPU_BLUELIGHTNING_3X enables triple-clock mode on IBM Blue Lightning 62# CPU if CPU supports it. The default is double-clock mode on 63# BlueLightning CPU box. 64# 65# CPU_BLUELIGHTNING_FPU_OP_CACHE enables FPU operand cache on IBM 66# BlueLightning CPU. It works only with Cyrix FPU, and this option 67# should not be used with Intel FPU. 68# 69# CPU_BTB_EN enables branch target buffer on Cyrix 5x86 (NOTE 1). 70# 71# CPU_CYRIX_NO_LOCK enables weak locking for the entire address space 72# of Cyrix 6x86 and 6x86MX CPUs by setting the NO_LOCK bit of CCR1. 73# Otherwise, the NO_LOCK bit of CCR1 is cleared. (NOTE 3) 74# 75# CPU_DIRECT_MAPPED_CACHE sets L1 cache of Cyrix 486DLC CPU in direct 76# mapped mode. Default is 2-way set associative mode. 77# 78# CPU_DISABLE_5X86_LSSER disables load store serialize (i.e., enables 79# reorder). This option should not be used if you use memory mapped 80# I/O device(s). 81# 82# CPU_DISABLE_CMPXCHG disables the CMPXCHG instruction on > i386 IA32 83# machines. VmWare 3.x seems to emulate this instruction poorly, causing 84# the guest OS to run very slowly. This problem appears to be fixed in 85# VmWare 4.x, at least in version 4.5.2, so that enabling this option with 86# VmWare 4.x will result in locking operations to be 20-30 times slower. 87# Enabling this with an SMP kernel will cause the kernel to be unusable. 88# 89# CPU_DISABLE_SSE explicitly prevents I686_CPU from turning on SSE. 90# 91# CPU_FASTER_5X86_FPU enables faster FPU exception handler. 92# 93# CPU_I486_ON_386 enables CPU cache on i486 based CPU upgrade products 94# for i386 machines. 95# 96# CPU_IORT defines I/O clock delay time (NOTE 1). Default values of 97# I/O clock delay time on Cyrix 5x86 and 6x86 are 0 and 7,respectively 98# (no clock delay). 99# 100# CPU_L2_LATENCY specifies the L2 cache latency value. This option is used 101# only when CPU_PPRO2CELERON is defined and Mendocino Celeron is detected. 102# The default value is 5. 103# 104# CPU_LOOP_EN prevents flushing the prefetch buffer if the destination 105# of a jump is already present in the prefetch buffer on Cyrix 5x86(NOTE 106# 1). 107# 108# CPU_PPRO2CELERON enables L2 cache of Mendocino Celeron CPUs. This option 109# is useful when you use Socket 8 to Socket 370 converter, because most Pentium 110# Pro BIOSs do not enable L2 cache of Mendocino Celeron CPUs. 111# 112# CPU_RSTK_EN enables return stack on Cyrix 5x86 (NOTE 1). 113# 114# CPU_SUSP_HLT enables suspend on HALT. If this option is set, CPU 115# enters suspend mode following execution of HALT instruction. 116# 117# CPU_UPGRADE_HW_CACHE eliminates unneeded cache flush instruction(s). 118# 119# CPU_WT_ALLOC enables write allocation on Cyrix 6x86/6x86MX and AMD 120# K5/K6/K6-2 CPUs. 121# 122# CYRIX_CACHE_WORKS enables CPU cache on Cyrix 486 CPUs with cache 123# flush at hold state. 124# 125# CYRIX_CACHE_REALLY_WORKS enables (1) CPU cache on Cyrix 486 CPUs 126# without cache flush at hold state, and (2) write-back CPU cache on 127# Cyrix 6x86 whose revision < 2.7 (NOTE 2). 128# 129# NO_F00F_HACK disables the hack that prevents Pentiums (and ONLY 130# Pentiums) from locking up when a LOCK CMPXCHG8B instruction is 131# executed. This option is only needed if I586_CPU is also defined, 132# and should be included for any non-Pentium CPU that defines it. 133# 134# NO_MEMORY_HOLE is an optimisation for systems with AMD K6 processors 135# which indicates that the 15-16MB range is *definitely* not being 136# occupied by an ISA memory hole. 137# 138# NOTE 1: The options, CPU_BTB_EN, CPU_LOOP_EN, CPU_IORT, 139# CPU_LOOP_EN and CPU_RSTK_EN should not be used because of CPU bugs. 140# These options may crash your system. 141# 142# NOTE 2: If CYRIX_CACHE_REALLY_WORKS is not set, CPU cache is enabled 143# in write-through mode when revision < 2.7. If revision of Cyrix 144# 6x86 >= 2.7, CPU cache is always enabled in write-back mode. 145# 146# NOTE 3: This option may cause failures for software that requires 147# locked cycles in order to operate correctly. 148# 149options CPU_BLUELIGHTNING_3X 150options CPU_BLUELIGHTNING_FPU_OP_CACHE 151options CPU_BTB_EN 152options CPU_DIRECT_MAPPED_CACHE 153options CPU_DISABLE_5X86_LSSER 154options CPU_DISABLE_CMPXCHG 155#options CPU_DISABLE_SSE 156options CPU_FASTER_5X86_FPU 157options CPU_I486_ON_386 158options CPU_IORT 159options CPU_L2_LATENCY=5 160options CPU_LOOP_EN 161options CPU_PPRO2CELERON 162options CPU_RSTK_EN 163options CPU_SUSP_HLT 164options CPU_UPGRADE_HW_CACHE 165options CPU_WT_ALLOC 166options CYRIX_CACHE_WORKS 167options CYRIX_CACHE_REALLY_WORKS 168#options NO_F00F_HACK 169 170# Debug options 171options NPX_DEBUG # enable npx debugging 172 173# 174# PERFMON causes the driver for Pentium/Pentium Pro performance counters 175# to be compiled. See perfmon(4) for more information. 176# 177options PERFMON 178 179 180##################################################################### 181# NETWORKING OPTIONS 182 183# 184# DEVICE_POLLING adds support for mixed interrupt-polling handling 185# of network device drivers, which has significant benefits in terms 186# of robustness to overloads and responsivity, as well as permitting 187# accurate scheduling of the CPU time between kernel network processing 188# and other activities. The drawback is a moderate (up to 1/HZ seconds) 189# potential increase in response times. 190# It is strongly recommended to use HZ=1000 or 2000 with DEVICE_POLLING 191# to achieve smoother behaviour. 192# Additionally, you can enable/disable polling at runtime with help of 193# the ifconfig(8) utility, and select the CPU fraction reserved to 194# userland with the sysctl variable kern.polling.user_frac 195# (default 50, range 0..100). 196# 197# Not all device drivers support this mode of operation at the time of 198# this writing. See polling(4) for more details. 199 200options DEVICE_POLLING 201 202 203##################################################################### 204# CLOCK OPTIONS 205 206# The following options are used for debugging clock behavior only, and 207# should not be used for production systems. 208 209# CLK_CALIBRATION_LOOP causes clock calibration to be run in a loop at 210# startup until the user presses a key. (The i8254 clock is always 211# calibrated relative to the RTC (mc146818a) and this option causes the 212# calibration to be repeated.) 213options CLK_CALIBRATION_LOOP 214 215# CLK_USE_I8254_CALIBRATION causes the calibrated frequency of the i8254 216# clock to actually be used. 217options CLK_USE_I8254_CALIBRATION 218 219 220##################################################################### 221# MISCELLANEOUS DEVICES AND OPTIONS 222 223device speaker #Play IBM BASIC-style noises out your speaker 224hint.speaker.0.at="isa" 225hint.speaker.0.port="0x35" 226device gzip #Exec gzipped a.out's. REQUIRES COMPAT_AOUT! 227device apm_saver # Requires APM 228 229 230##################################################################### 231# HARDWARE BUS CONFIGURATION 232 233# 234# ISA bus 235# 236device isa 237 238# 239# Options for `isa': 240# 241# AUTO_EOI_1 enables the `automatic EOI' feature for the master 8259A 242# interrupt controller. This saves about 0.7-1.25 usec for each interrupt. 243# This option breaks suspend/resume on some portables. 244# 245# MAXMEM specifies the amount of RAM on the machine; if this is not 246# specified, FreeBSD will first read the amount of memory from the CMOS 247# RAM, so the amount of memory will initially be limited to 64MB or 16MB 248# depending on the BIOS. If the BIOS reports 64MB, a memory probe will 249# then attempt to detect the installed amount of RAM. If this probe 250# fails to detect >64MB RAM you will have to use the MAXMEM option. 251# The amount is in kilobytes, so for a machine with 128MB of RAM, it would 252# be 131072 (128 * 1024). 253# 254# BROKEN_KEYBOARD_RESET disables the use of the keyboard controller to 255# reset the CPU for reboot. This is needed on some systems with broken 256# keyboard controllers. 257 258options AUTO_EOI_1 259 260options MAXMEM=(128*1024) 261#options BROKEN_KEYBOARD_RESET 262options EPSON_BOUNCEDMA 263options EPSON_MEMWIN 264 265# 266# PCI bus & PCI options: 267# 268device pci 269 270# 271# AGP GART support 272device agp 273 274 275##################################################################### 276# HARDWARE DEVICE CONFIGURATION 277 278# PC98 keyboard 279device pckbd 280hint.pckbd.0.at="isa" 281hint.pckbd.0.port="0x041" 282hint.pckbd.0.irq="1" 283 284# These options are valid for other keyboard drivers as well. 285options KBD_DISABLE_KEYMAP_LOAD # refuse to load a keymap 286options KBD_INSTALL_CDEV # install a CDEV entry in /dev 287 288# GDC screen 289device gdc 290hint.gdc.0.at="isa" 291options LINE30 292 293# 294# The Numeric Processing eXtension driver. This is non-optional. 295device npx 296 297# 298# `flags' for npx0: 299# 0x01 don't use the npx registers to optimize bcopy. 300# 0x02 don't use the npx registers to optimize bzero. 301# 0x04 don't use the npx registers to optimize copyin or copyout. 302# The npx registers are normally used to optimize copying and zeroing when 303# all of the following conditions are satisfied: 304# I586_CPU is an option 305# the cpu is an i586 (perhaps not a Pentium) 306# the probe for npx0 succeeds 307# INT 16 exception handling works. 308# Then copying and zeroing using the npx registers is normally 30-100% faster. 309# The flags can be used to control cases where it doesn't work or is slower. 310# Setting them at boot time using hints works right (the optimizations 311# are not used until later in the bootstrap when npx0 is attached). 312# Flag 0x08 automatically disables the i586 optimized routines. 313# 314 315# 316# Optional devices: 317# 318 319# 3Dfx Voodoo Graphics, Voodoo II /dev/3dfx CDEV support. This will create 320# the /dev/3dfx0 device to work with glide implementations. This should get 321# linked to /dev/3dfx and /dev/voodoo. Note that this is not the same as 322# the tdfx DRI module from XFree86 and is completely unrelated. 323# 324# To enable Linuxulator support, one must also include COMPAT_LINUX in the 325# config as well, or you will not have the dependencies. The other option 326# is to load both as modules. 327 328device tdfx # Enable 3Dfx Voodoo support 329options TDFX_LINUX # Enable Linuxulator support 330 331# Direct Rendering modules for 3D acceleration. 332device drm # DRM core module required by DRM drivers 333device mach64drm # ATI Rage Pro, Rage Mobility P/M, Rage XL 334device mgadrm # AGP Matrox G200, G400, G450, G550 335device r128drm # ATI Rage 128 336device radeondrm # ATI Radeon 337device sisdrm # SiS 300/305, 540, 630 338device tdfxdrm # 3dfx Voodoo 3/4/5 and Banshee 339options DRM_DEBUG # Include debug printfs (slow) 340 341# 342# Bus mouse 343# 344device mse 345hint.mse.0.at="isa" 346hint.mse.0.port="0x7fd9" 347hint.mse.0.irq="13" 348 349# 350# Network interfaces: 351# 352 353# ar: Arnet SYNC/570i hdlc sync 2/4 port V.35/X.21 serial driver 354# (requires sppp) 355# cp: Cronyx Tau-PCI sync single/dual/four port 356# V.35/RS-232/RS-530/RS-449/X.21/G.703/E1/E3/T3/STS-1 357# serial adaptor (requires sppp (default), or NETGRAPH if 358# NETGRAPH_CRONYX is configured) 359# ed: Western Digital and SMC 80xx; Novell NE1000 and NE2000; 3Com 3C503 360# HP PC Lan+, various PC Card devices 361# (requires miibus) 362# ie: AT&T StarLAN 10 and EN100; 3Com 3C507; unknown NI5210; 363# Intel EtherExpress 364# lnc: Lance/PCnet cards (Isolan, Novell NE2100, NE32-VL, AMD Am7990 and 365# Am79C960) 366# oltr: Olicom ISA token-ring adapters OC-3115, OC-3117, OC-3118 and OC-3133. 367# Olicom PCI token-ring adapters OC-3136, OC-3137, OC-3139, OC-3140, 368# OC-3141, OC-3540 and OC-3250. 369# sbni: Granch SBNI12-xx ISA and PCI adapters 370# sr: RISCom/N2 hdlc sync 1/2 port V.35/X.21 serial driver (requires sppp) 371 372# Order for ISA/EISA devices is important here 373 374device ar 375device cp 376device ed 377#options ED_NO_MIIBUS # Disable ed miibus support 378hint.ed.0.at="isa" 379hint.ed.0.port="0x280" 380hint.ed.0.irq="5" 381hint.ed.0.maddr="0xd8000" 382device ie # Hints only required for Starlan 383hint.ie.2.at="isa" 384hint.ie.2.port="0x300" 385hint.ie.2.irq="5" 386hint.ie.2.maddr="0xd0000" 387device lnc 388hint.lnc.0.at="isa" 389hint.lnc.0.port="0x280" 390hint.lnc.0.irq="10" 391hint.lnc.0.drq="0" 392device sbni 393hint.sbni.0.at="isa" 394hint.sbni.0.port="0x210" 395hint.sbni.0.irq="0xefdead" 396hint.sbni.0.flags="0" 397device snc 398hint.snc.0.at="isa" 399hint.snc.0.port="0x888" 400hint.snc.0.irq="6" 401hint.snc.0.maddr="0xc0000" 402device sr 403device oltr 404 405# 406# SCSI host adapters: 407# 408# ct: WD33C93[ABC] based SCSI host adapters. 409# ncv: NCR 53C500 based SCSI host adapters. 410# nsp: Workbit Ninja SCSI-3 based PC Card SCSI host adapters. 411# stg: TMC 18C30, 18C50 based SCSI host adapters. 412 413device ct 414hint.ct.0.at="isa" 415device ncv 416device nsp 417device stg 418 419# 420# SafeNet crypto driver: can be moved to the MI NOTES as soon as 421# it's tested on a big-endian machine 422# 423device safe # SafeNet 1141 424options SAFE_DEBUG # enable debugging support: hw.safe.debug 425options SAFE_RNDTEST # enable rndtest support 426 427##################################################################### 428 429# 430# Miscellaneous hardware: 431# 432# apm: Laptop Advanced Power Management (experimental) 433# pmtimer: Timer device driver for power management events (APM or ACPI) 434# cy: Cyclades serial driver 435# digi: Digiboard driver 436 437# Notes on APM 438# The flags takes the following meaning for apm0: 439# 0x0020 Statclock is broken. 440 441device apm 442hint.apm.0.flags="0x20" 443device canbus 444device canbepm 445device cy 446options CY_PCI_FASTINTR # Use with cy_pci unless irq is shared 447device digi 448# BIOS & FEP/OS components of device digi. 449device digi_CX 450device digi_CX_PCI 451device digi_EPCX 452device digi_EPCX_PCI 453device digi_Xe 454device digi_Xem 455device digi_Xr 456device olpt 457hint.olpt.0.at="isa" 458hint.olpt.0.port="0x040" 459device pmc 460hint.pmc.0.at="isa" 461hint.pmc.0.port="0x8f0" 462device pmtimer # Adjust system timer at wakeup time 463 464# 465# Laptop/Notebook options: 466# 467# See also: 468# apm under `Miscellaneous hardware' 469# above. 470 471# For older notebooks that signal a powerfail condition (external 472# power supply dropped, or battery state low) by issuing an NMI: 473 474options POWERFAIL_NMI # make it beep instead of panicing 475 476#--------------------------------------------------------------------------- 477# ISDN4BSD 478# 479# See /usr/share/examples/isdn/ROADMAP for an introduction to isdn4bsd. 480# 481# i4b passive ISDN cards support contains the following hardware drivers: 482# 483# isic - Siemens/Infineon ISDN ISAC/HSCX/IPAC chipset driver 484# iwic - Winbond W6692 PCI bus ISDN S/T interface controller 485# ifpi - AVM Fritz!Card PCI driver 486# ifpi2 - AVM Fritz!Card PCI version 2 driver 487# ihfc - Cologne Chip HFC ISA/ISA-PnP chipset driver 488# ifpnp - AVM Fritz!Card PnP driver 489# itjc - Siemens ISAC / TJNet Tiger300/320 chipset 490# 491# i4b active ISDN cards support contains the following hardware drivers: 492# 493# iavc - AVM B1 PCI, AVM B1 ISA, AVM T1 494# 495# Note that the ``options'' (if given) and ``device'' lines must BOTH 496# be uncommented to enable support for a given card ! 497# 498# In addition to a hardware driver (and probably an option) the mandatory 499# ISDN protocol stack devices and the mandatory support device must be 500# enabled as well as one or more devices from the optional devices section. 501# 502#--------------------------------------------------------------------------- 503# isic driver (Siemens/Infineon chipsets) 504# 505device isic 506# 507# PCI bus Cards: 508# -------------- 509# 510# ELSA MicroLink ISDN/PCI (same as ELSA QuickStep 1000pro PCI) 511options ELSA_QS1PCI 512# 513#--------------------------------------------------------------------------- 514# ifpnp driver for AVM Fritz!Card PnP 515# 516# AVM Fritz!Card PnP 517device ifpnp 518# 519#--------------------------------------------------------------------------- 520# ihfc driver for Cologne Chip ISA chipsets (experimental!) 521# 522# Teles 16.3c ISA PnP 523# AcerISDN P10 ISA PnP 524# TELEINT ISDN SPEED No.1 525device ihfc 526# 527#--------------------------------------------------------------------------- 528# ifpi driver for AVM Fritz!Card PCI 529# 530# AVM Fritz!Card PCI 531device ifpi 532# 533#--------------------------------------------------------------------------- 534# ifpi2 driver for AVM Fritz!Card PCI version 2 535# 536# AVM Fritz!Card PCI version 2 537device ifpi2 538# 539#--------------------------------------------------------------------------- 540# iwic driver for Winbond W6692 chipset 541# 542# ASUSCOM P-IN100-ST-D (and other Winbond W6692 based cards) 543device iwic 544# 545#--------------------------------------------------------------------------- 546# itjc driver for Siemens ISAC / TJNet Tiger300/320 chipset 547# 548# Traverse Technologies NETjet-S 549# Teles PCI-TJ 550device itjc 551# 552#--------------------------------------------------------------------------- 553# iavc driver (AVM active cards, needs i4bcapi driver!) 554# 555device iavc 556# 557#--------------------------------------------------------------------------- 558# ISDN Protocol Stack - mandatory for all hardware drivers 559# 560# Q.921 / layer 2 - i4b passive cards D channel handling 561device i4bq921 562# 563# Q.931 / layer 3 - i4b passive cards D channel handling 564device i4bq931 565# 566# layer 4 - i4b common passive and active card handling 567device i4b 568# 569#--------------------------------------------------------------------------- 570# ISDN devices - mandatory for all hardware drivers 571# 572# userland driver to do ISDN tracing (for passive cards only) 573device i4btrc 574options NI4BTRC=4 575# 576# userland driver to control the whole thing 577device i4bctl 578# 579#--------------------------------------------------------------------------- 580# ISDN devices - optional 581# 582# userland driver for access to raw B channel 583device i4brbch 584options NI4BRBCH=4 585# 586# userland driver for telephony 587device i4btel 588options NI4BTEL=2 589# 590# network driver for IP over raw HDLC ISDN 591device i4bipr 592options NI4BIPR=4 593# enable VJ header compression detection for ipr i/f 594options IPR_VJ 595# enable logging of the first n IP packets to isdnd (n=32 here) 596options IPR_LOG=32 597# 598# network driver for sync PPP over ISDN; requires an equivalent 599# number of sppp device to be configured 600device i4bisppp 601options NI4BISPPP=4 602# 603# B-channel interface to the netgraph subsystem 604device i4bing 605options NI4BING=2 606# 607# CAPI driver needed for active ISDN cards (see iavc driver above) 608device i4bcapi 609# 610#--------------------------------------------------------------------------- 611 612# 613# Set the number of PV entries per process. Increasing this can 614# stop panics related to heavy use of shared memory. However, that can 615# (combined with large amounts of physical memory) cause panics at 616# boot time due the kernel running out of VM space. 617# 618# If you're tweaking this, you might also want to increase the sysctls 619# "vm.v_free_min", "vm.v_free_reserved", and "vm.v_free_target". 620# 621# The value below is the one more than the default. 622# 623options PMAP_SHPGPERPROC=201 624 625# 626# Change the size of the kernel virtual address space. Due to 627# constraints in loader(8) on i386, this must be a multiple of 4. 628# 256 = 1 GB of kernel address space. Increasing this also causes 629# a reduction of the address space in user processes. 512 splits 630# the 4GB cpu address space in half (2GB user, 2GB kernel). 631# 632options KVA_PAGES=260 633 634 635##################################################################### 636# ABI Emulation 637 638# Enable iBCS2 runtime support for SCO and ISC binaries 639options IBCS2 640 641# Emulate spx device for client side of SVR3 local X interface 642options SPX_HACK 643 644# Enable Linux ABI emulation 645options COMPAT_LINUX 646 647# Enable i386 a.out binary support 648options COMPAT_AOUT 649 650# Enable the linux-like proc filesystem support (requires COMPAT_LINUX 651# and PSEUDOFS) 652options LINPROCFS 653 654# 655# SysVR4 ABI emulation 656# 657# The svr4 ABI emulator can be statically compiled into the kernel or loaded as 658# a KLD module. 659# The STREAMS network emulation code can also be compiled statically or as a 660# module. If loaded as a module, it must be loaded before the svr4 module 661# (the /usr/sbin/svr4 script does this for you). If compiling statically, 662# the `streams' device must be configured into any kernel which also 663# specifies COMPAT_SVR4. It is possible to have a statically-configured 664# STREAMS device and a dynamically loadable svr4 emulator; the /usr/sbin/svr4 665# script understands that it doesn't need to load the `streams' module under 666# those circumstances. 667# Caveat: At this time, `options KTRACE' is required for the svr4 emulator 668# (whether static or dynamic). 669# 670options COMPAT_SVR4 # build emulator statically 671options DEBUG_SVR4 # enable verbose debugging 672device streams # STREAMS network driver (required for svr4). 673 674 675##################################################################### 676# VM OPTIONS 677 678# Disable the 4 MByte page PSE CPU feature. The PSE feature allows the 679# kernel to use 4 MByte pages to map the kernel instead of 4k pages. 680# This saves on the amount of memory needed for page tables needed to 681# map the kernel. You should only disable this feature as a temporary 682# workaround if you are having problems with it enabled. 683# 684#options DISABLE_PSE 685 686# Disable the global pages PGE CPU feature. The PGE feature allows pages 687# to be marked with the PG_G bit. TLB entries for these pages are not 688# flushed from the cache when %cr3 is reloaded. This can make context 689# switches less expensive. You should only disable this feature as a 690# temporary workaround if you are having problems with it enabled. 691# 692#options DISABLE_PG_G 693 694# KSTACK_PAGES is the number of memory pages to assign to the kernel 695# stack of each thread. 696 697options KSTACK_PAGES=3 698 699##################################################################### 700 701# More undocumented options for linting. 702# Note that documenting these are not considered an affront. 703 704options FB_INSTALL_CDEV # install a CDEV entry in /dev 705 706# PECOFF module (Win32 Execution Format) 707options PECOFF_SUPPORT 708options PECOFF_DEBUG 709 710options I4B_SMP_WORKAROUND 711options I586_PMC_GUPROF=0x70000 712options KBDIO_DEBUG=2 713options KBD_MAXRETRY=4 714options KBD_MAXWAIT=6 715options KBD_RESETDELAY=201 716 717options TIMER_FREQ=((14318182+6)/12) 718 719options VM_KMEM_SIZE 720options VM_KMEM_SIZE_MAX 721options VM_KMEM_SIZE_SCALE 722 723 724# The I/O device 725device io 726 727 728##################################################################### 729# Devices we don't want to deal with 730 731nodevice atkbdc 732nodevice atkbd 733nodevice psm 734nodevice vga 735nodevice bt 736nodevice adw 737nodevice aha 738nodevice ahb 739nodevice ahd 740nodevice mpt 741nodevice trm 742nodevice wds 743nodevice asr 744nodevice dpt 745nodevice ciss 746nodevice iir 747nodevice mly 748nodevice ida # Compaq Smart RAID 749nodevice mlx # Mylex DAC960 750nodevice amr # AMI MegaRAID 751nodevice twe # 3ware ATA RAID 752nodevice ataraid 753nodevice cm 754nodevice cs 755nodevice ex 756nodevice fea 757nodevice intpm 758nodevice alpm 759nodevice ichsmb 760nodevice viapm 761nodevice amdpm 762nodevice nfpm 763 764 765##################################################################### 766# Options we don't want to deal with 767 768nooption VGA_DEBUG 769nooption VGA_WIDTH90 770nooption VGA_SLOW_IOACCESS 771nooption VGA_ALT_SEQACCESS 772nooption PSM_RESETAFTERSUSPEND 773nooption PSM_HOOKRESUME 774nooption ATKBD_DFLT_KEYMAP 775nooption AHD_DEBUG 776nooption AHD_DEBUG_OPTS 777nooption AHD_REG_PRETTY_PRINT 778nooption ADW_ALLOW_MEMIO 779nooption DPT_LOST_IRQ 780nooption DPT_RESET_HBA 781nooption DPT_TIMEOUT_FACTOR 782nooption AAC_DEBUG 783nooption ACPI_MAX_THREADS 784 785 786##################################################################### 787# Make options we don't want to deal with 788 789nomakeoption ATKBD_DFLT_KEYMAP 790