ubuntu自己编译内核很大

dajun

ubuntu704 amd64

cd linux
cp /boot/config-2.6.20-16-generic .config
make menuconfig
这里还去掉了很多模块
fakeroot make-kpkg --initrd  kernel_image

结果出来的deb最小的一次也100M左右，vmlinuz 1.6M,initrd有20M！！！ :comp

:mad:

莫非 /boot/config-2.6.20-16-generic 和默认内核编译是的menuconfig没有关系？

以前我也在debian（ia32)上build过内核，但是 没注意到这样的问题。。。

关键问题是我旧的内核和新内核都不支持dma
旧内核还有很多没用的模块

还有就是config的时候选模块很头大，有没有权威点的文档？网上的中文文档都很旧，大多说的不清楚。

dajun

1. # lspci
   
2. 00:00.0 RAM memory: nVidia Corporation C51 Host Bridge (rev a2)
   
3. 00:00.1 RAM memory: nVidia Corporation C51 Memory Controller 0 (rev a2)
   
4. 00:00.2 RAM memory: nVidia Corporation C51 Memory Controller 1 (rev a2)
   
5. 00:00.3 RAM memory: nVidia Corporation C51 Memory Controller 5 (rev a2)
   
6. 00:00.4 RAM memory: nVidia Corporation C51 Memory Controller 4 (rev a2)
   
7. 00:00.5 RAM memory: nVidia Corporation C51 Host Bridge (rev a2)
   
8. 00:00.6 RAM memory: nVidia Corporation C51 Memory Controller 3 (rev a2)
   
9. 00:00.7 RAM memory: nVidia Corporation C51 Memory Controller 2 (rev a2)
   
10. 00:02.0 PCI bridge: nVidia Corporation C51 PCI Express Bridge (rev a1)
    
11. 00:03.0 PCI bridge: nVidia Corporation C51 PCI Express Bridge (rev a1)
    
12. 00:04.0 PCI bridge: nVidia Corporation C51 PCI Express Bridge (rev a1)
    
13. 00:09.0 RAM memory: nVidia Corporation MCP51 Host Bridge (rev a2)
    
14. 00:0a.0 ISA bridge: nVidia Corporation MCP51 LPC Bridge (rev a3)
    
15. 00:0a.1 SMBus: nVidia Corporation MCP51 SMBus (rev a3)
    
16. 00:0b.0 USB Controller: nVidia Corporation MCP51 USB Controller (rev a3)
    
17. 00:0b.1 USB Controller: nVidia Corporation MCP51 USB Controller (rev a3)
    
18. 00:0d.0 IDE interface: nVidia Corporation MCP51 IDE (rev a1)
    
19. 00:0e.0 IDE interface: nVidia Corporation MCP51 Serial ATA Controller (rev a1)
    
20. 00:10.0 PCI bridge: nVidia Corporation MCP51 PCI Bridge (rev a2)
    
21. 00:10.1 Audio device: nVidia Corporation MCP51 High Definition Audio (rev a2)
    
22. 00:14.0 Bridge: nVidia Corporation MCP51 Ethernet Controller (rev a3)
    
23. 00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration
    
24. 00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map
    
25. 00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller
    
26. 00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control
    
27. 04:00.0 VGA compatible controller: nVidia Corporation Quadro NVS 110M / GeForce Go 7300 (rev a1)
    
28. 05:01.0 FireWire (IEEE 1394): Ricoh Co Ltd Unknown device 0832
    
29. 05:01.1 Generic system peripheral [0805]: Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter (rev 19)
    
30. 05:01.2 System peripheral: Ricoh Co Ltd Unknown device 0843 (rev 01)
    
31. 05:01.3 System peripheral: Ricoh Co Ltd R5C592 Memory Stick Bus Host Adapter (rev 0a)
    

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fuch

vmlinuz 1.6M不算大
偶还是觉得你编译的模块有点多……

高热

我自己编译内核一个模块也不要，只把自己需要的驱动全部编入内核，这样下来，一共才1.4M，连initrd也不需要了，哈哈。
建议按这里配置内核：
http://lamp.linux.gov.cn/Linux/kernel_options.html

dajun

我以前也看了这个文章,写的也不是很透彻,许多东西只是说这是啥啥啥,就不说该怎么作,

dajun

刚才又在公司的机器(奔4,fc6)上编译最新的2.6.22内核,
结果vmlinuz initrd都和系统默认的差不多大

不知道ubuntu的怎么回事^


那个optimize for size作用用多大?

dajun

嗷嗷,又来一次,对比一下我的安装后/lib/modules/2.6.22下还是好几百M

#du -h 2.6.22/kernel/drivers/video/aty/*
180K    2.6.22/kernel/drivers/video/aty/aty128fb.ko
568K    2.6.22/kernel/drivers/video/aty/atyfb.ko
1.1M    2.6.22/kernel/drivers/video/aty/radeonfb.ko

#du -h 2.6.18-1.2798.fc6/kernel/drivers/video/aty/*
36K     2.6.18-1.2798.fc6/kernel/drivers/video/aty/aty128fb.ko
64K     2.6.18-1.2798.fc6/kernel/drivers/video/aty/atyfb.ko
196K    2.6.18-1.2798.fc6/kernel/drivers/video/aty/radeonfb.ko


拿这3个模块来说吧,我在menuconfig的时候根本没配置显卡什么的,怎么同样的3个ko都比人家的大呢?

高热

我一般是先make defconfig
然后再make menuconfig选择合适的驱动

d00m3d

不同版本的 gcc 对体积也有关系，并非单纯内核模块的选项