除非你在很少的内存且不使用交换内存时，才不要选择这项
(0) Function alignment
(0) Label alignment
(0) Loop alignment
(0) Jump alignment
可加载模块：
Loadable module support --->
[*] Enable loadable module support
[*] Module unloading
不选这个功能，加载的模块就不能卸载
[ ] Forced module unloading
[ ] Module versioning support (EXPERIMENTAL)
[ ] Source checksum for all modules
[*] Automatic kernel module loading
处理器类型及特性：
Processor type and features --->
Subarchitecture Type (PC-compatible) --->
Processor family (Pentium-4/Celeron(P4-based)/Pentium-4 M/Xeon) --->
[ ] Generic x86 support
这一选项针对x86系列的CPU使用更多的常规优化。如果你在上面一项选的是i386、i586之类的才选这个
[*] HPET Timer Support
HPET是替代8254芯片的下一代时钟处理器。这里你可以安全的选上这一选项。如果硬件不支持的话，将仍使用8254时钟处理器
[*] Symmetric multi-processing support
对称多处理器支持，在单CPU的机器上，不选这个选项会更快一些。由于超线程技术，看起来是两颗CPU，因些要选上这个选项
(1) Maximum number of CPUs (2-255) 支持的最大CPU数
[ ] SMT (Hyperthreading) scheduler support
[*] Preemptible Kernel
这个选项能使应用程序即使内核在高负载时也很可靠，建议最好选上
[*] Machine Check Exception
这个选项能让CPU检测到系统故障时通知内核，一般我用组装的台式机会选这项。
< > Toshiba Laptop support
< > Dell laptop support
< > /dev/cpu/microcode - Intel IA32 CPU microcode support
< > /dev/cpu/*/msr - Model-specific register support
< > /dev/cpu/*/cpuid - CPU information support
Firmware Drivers --->
< > BIOS Enhanced Disk Drive calls determine boot disk (EXPERIMENTAL)
High Memory Support (4GB) --->
[ ] Allocate 3rd-level pagetables from highmem
[ ] Math emulation
[*] MTRR (Memory Type Range Register) support
[ ] Boot from EFI support (EXPERIMENTAL)
[*] Enable kernel irq balancing
[ ] Use register arguments (EXPERIMENTAL)
电源管理：
Power management options (ACPI, APM) --->
[*] Power Management support
[ ] Power Management Debug Support
[ ] Software Suspend (EXPERIMENTAL)
ACPI (Advanced Configuration and Power Interface) Support --->
APM (Advanced Power Management) BIOS Support --->
CPU Frequency scaling --->
ACPI (Advanced Configuration and Power Interface) Support --->
[*] ACPI Support
这是一种电源管理方式，你可以看看你的BIOS是否支持。如果支持的话建议你选上这项
[ ] Sleep States (EXPERIMENTAL)
< > AC Adapter
< > Battery
<*> Button 捕获Power、Sleep、Lid（我也不知道这是什么按钮）等按钮是否按下，并做相应的动作
<*> Video 集成在板上的显卡的ACPI支持，对有些板卡可能不起作用
< > Fan
<*> Processor
<*> Thermal Zone
< > ASUS/Medion Laptop Extras
< > IBM ThinkPad Laptop Extras
< > Toshiba Laptop Extras
(0) Disable ACPI for systems before Jan 1st this year
[ ] Debug Statements
[*] Power Management Timer Support
APM (Advanced Power Management) BIOS Support --->
< > APM (Advanced Power Management) BIOS support
高级电源管理的支持，一般来说笔记本应该选上，台式机可以不选。
[ ] Ignore USER SUSPEND
[*] Enable PM at boot time
[ ] Make CPU Idle calls when idle
[ ] Enable console blanking using APM
[ ] RTC stores time in GMT 按Unix的标准，硬件的时钟应该设为格林威治时间
[ ] Allow interrupts during APM BIOS calls
[*] Use real mode APM BIOS call to power off
[*] CPU Frequency scaling
这一选项允许改变CPU的主频，使CPU在低负荷或使用电池时降低主频，达到省电的目的。
[ ] Enable CPUfreq debugging
< > /proc/cpufreq interface (deprecated)
Default CPUFreq governor (performance) --->
--- 'performance' governor
<*> 'powersave' governor
<*> 'userspace' governor for userspace frequency scaling
[ ] /proc/sys/cpu/ interface (2.4. / OLD)
<*> 'ondemand' cpufreq policy governor自动调节主频
<*> CPU frequency table helpers 多数的CPU需要这一项来调节主频
<*> ACPI Processor P-States driver 报告处理器的状态
< > AMD Mobile K6-2/K6-3 PowerNow!
< > AMD Mobile Athlon/Duron PowerNow!
< > AMD Opteron/Athlon64 PowerNow!
< > Cyrix MediaGX/NatSemi Geode Suspend Modulation
<*> Intel Enhanced SpeedStep Intel的变频技术支持
[ ] Use ACPI tables to decode valid frequency/voltage pairs
--- Built-in tables for Banias CPUs
< > Intel Speedstep on ICH-M chipsets (ioport interface)
< > Intel SpeedStep on 440BX/ZX/MX chipsets (SMI interface)
< > Intel Pentium 4 clock modulation
< > nVidia nForce2 FSB changing
< > Transmeta LongRun
< > VIA Cyrix III Longhaul
--- shared options
[ ] /proc/acpi/processor/../performance interface (deprecated)
[ ] Relaxed speedstep capability checks
总线类型：
[*] PCI support
PCI access mode (Any) --->强列建议选Any，系统将优先使用MMConfig，然后使用BIOS，最后使用Direct检测PCI设备。
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