FreeBSD 5-CURRENT 的内核配置与优化(2)

# current分支调试[我不打算翻译了，如果你到了能调试内核
# 的层次，应该能看懂]
options DDB #Enable the kernel debugger
options INVARIANTS #Enable calls of extra sanity checking
options INVARIANT_SUPPORT #Extra sanity checks of internal structures, required by INVARIANTS
options WITNESS #Enable checks to detect deadlocks and cycles
options WITNESS_SKIPSPIN #Don't run witness on spinlocks for speed

# SMP支持
options SMP # Symmetric MultiProcessor Kernel
options APIC_IO # Symmetric (APIC) I/O

device isa
device eisa
device pci

# 软驱支持
device fdc

# DEVICE_POLLING可以让dc, fxp和sis设备更平稳地运行，不幸
# 的是它不能和SMP连用。
options DEVICE_POLLING

options AUTO_EOI_1 # 8259A自动中断结束控制方式。
# 可以提高系统性能
options AUTO_EOI_2 # 没证明过这东西能用，我的机器崩了

# 将这个文件保存到内核，这样将来可以用
# strings -n 3 /boot/kernel/kernel | sed -n 's/^___//p'
# 找回
options INCLUDE_CONFIG_FILE

options IPSEC #IPSec内核级支持，与IPSec互斥

options FAST_IPSEC # 快速IPSEC实现(需要相关硬件)

options IPFILTER # ipfilter支持。

options RANDOM_IP_ID # 此选项有效阻止远程探测TCP报文生成

options TCP_DROP_SYNFIN #丢弃SYN FIN的TCP包

options ZERO_COPY_SOCKETS # 这是对4.4BSD设计缺陷的重大改进
# 可以极大地提高网络性能

device crypto # 核心crypto(加密)支持
device cryptodev # /dev/crypto硬件访问支持

device hifn # Hifn 7951, 7781, etc.

options PANIC_REBOOT_WAIT_TIME=0 # panic时重启等待时间

# 请参考tuning(7)
options NMBCLUSTERS=4096 # 对于我的服务器合适的NMBCLUSTER

makeoptions CONF_CFLAGS=-fno-builtin #不允许使用 memcmp等

# 应用程序最大、堆栈、默认内存大小。内存2GB
options MAXDSIZ=(2047UL*1024*1024)
options MAXSSIZ=(128UL*1024*1024)
options DFLDSIZ=(2047UL*1024*1024)

# ufs1 扩展属性支持。Ufs2不需要
options UFS_EXTATTR
options UFS_EXTATTR_AUTOSTART

# GEOM支持
options GEOM_AES
options GEOM_APPLE
options GEOM_BDE
options GEOM_BSD
options GEOM_GPT
options GEOM_MBR
options GEOM_PC98
options GEOM_SUNLABEL

options QUOTA # 磁盘配额支持

# 优化SMP性能，把mutex(互斥体)变为自旋锁。我不敢用……
options ADAPTIVE_MUTEXES

# ATA 和 ATAPI 设备
device ata
device atadisk # ATA 磁盘驱动器
device atapicd # ATAPI光驱
device atapifd # ATAPI软驱
device atapist # ATAPI磁带机(财主的玩意
options ATA_STATIC_ID #静态设备标号

# SCSI 控制器
device ahb # EISA AHA1742 family
device ahc # AHA2940 and onboard AIC7xxx devices
device ahd # AHA39320/29320 and onboard AIC79xx devices
device amd # AMD 53C974 (Tekram DC-390(T))
device isp # Qlogic family
device mpt # LSI-Logic MPT-Fusion
#device ncr # NCR/Symbios Logic
device sym # NCR/Symbios Logic (newer chipsets those of `ncr')
device trm # Tekram DC395U/UW/F DC315U adapters

device adv # Advansys SCSI adapters
device adw # Advansys wide SCSI adapters
device aha # Adaptec 154x SCSI adapters
device aic # Adaptec 15[012]x SCSI adapters, AIC-6[23]60.
device bt # Buslogic/Mylex MultiMaster SCSI adapters

device ncv # NCR 53C500
device nsp # Workbit Ninja SCSI-3
device stg # TMC 18C30/18C50

# 通过SCSI接口的RAID控制器
device asr # DPT SmartRAID V, VI and Adaptec SCSI RAID
device ciss # Compaq Smart RAID 5*
device dpt # DPT Smartcache III, IV - See NOTES for options!
device iir # Intel Integrated RAID
device mly # Mylex AcceleRAID/eXtremeRAID

# SCSI设备
device scbus # SCSI bus (required)
device ch # SCSI media changers
device da # Direct Access (disks)
device sa # Sequential Access (tape etc)
device cd # CD
device pass # Passthrough device (direct SCSI access)
device ses # SCSI Environmental Services (and SAF-TE)

# RAID控制器
device aac # Adaptec FSA RAID
device aacp # SCSI passthrough for aac (requires CAM)
device amr # AMI MegaRAID
device ida # Compaq Smart RAID
device mlx # Mylex DAC960 family
device pst # Promise Supertrak SX6000
device twe # 3ware ATA RAID

# atkbdc0同时用于控制键盘和PS/2鼠标器
device atkbdc # AT键盘控制器
device atkbd # AT键盘
device psm # PS/2 mouse

device vga # VGA显示卡

# 启动画面和屏幕保护程序[我的服务器平时不接显示器]
device splash

# syscons是默认的控制台驱动
device sc

# 启用VT220兼容的控制台驱动pcvt
#device vt
#options XSERVER # support for X server on a vt console
#options FAT_CURSOR # start with block cursor

device agp # AGP支持

# 浮点运算支持-必须保留
device npx

# 电源管理
#device apm
# i8254挂起及恢复支持
device pmtimer

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