怎样编译内核去掉 initrd？

[AutoXBC]

这两天在练习编译内核，已经把模块数从 2298 裁减到了 1694，看到有的帖子提到可以把磁盘和文件系统驱动编到内核里去掉 initrd 提升启动时间，搜索了一下没有具体的例子。哪位实践过指点一下具体是哪几个选项，还有 grub 引导时有没有什么要注意的，谢谢。

[HuntXu]

1694...
去掉initrd在general setup里的，自己仔细看看吧...

代码： 全选

[hunt@bubble ~]$ O_< modprobe -l|wc -l
16
[hunt@bubble ~]$ O_< uname -r
2.6.28.7-hunt

[AutoXBC]

多谢指教，已经成功去掉 initrd 了，开机时间缩短 20%，慢慢优化，不急。

上面怎么会只有 16 个模块？我开机 lsmod 也有 100 多个的，太恐怖了。

[HuntXu]

多谢指教，已经成功去掉 initrd 了，开机时间缩短 20%，慢慢优化，不急。

上面怎么会只有 16 个模块？我开机 lsmod 也有 100 多个的，太恐怖了。

其他的都在内核里了...1.5M带了ext4...

[AutoXBC]

很强，能否把 config 帖上来，学习一下。

[HuntXu]

config不定适合每个人的，针对自己机器而已...

[AutoXBC]

哦，自己搞也好，更有乐趣。

[ctybeyond]

AutoXBC,
我也在make menuconfig去掉initrd支持了，还需要哪些配置才能使编译出来的内核镜像不需要initrd就能启动啊，能否说得详细点？

[AutoXBC]

需要把硬盘控制器的驱动和根分区文件系统模块编译入内核。

可以把 lspci -v 的输出贴上来看看。

[ctybeyond]

根分区文件系统是ext3，ext2和ext3都已经编进内核了，lspci -v 输出很多，如下：
root@AMTT:~# lspci -v
00:00.0 Host bridge: Intel Corporation 440BX/ZX/DX - 82443BX/ZX/DX Host bridge (rev 01)
Subsystem: VMware Inc Device 1976
Flags: bus master, medium devsel, latency 0
Kernel driver in use: agpgart-intel
Kernel modules: intel-agp

00:01.0 PCI bridge: Intel Corporation 440BX/ZX/DX - 82443BX/ZX/DX AGP bridge (rev 01)
Flags: bus master, 66MHz, medium devsel, latency 0
Bus: primary=00, secondary=01, subordinate=01, sec-latency=64
Kernel modules: shpchp

00:07.0 ISA bridge: Intel Corporation 82371AB/EB/MB PIIX4 ISA (rev 08)
Subsystem: VMware Inc Device 1976
Flags: bus master, medium devsel, latency 0

00:07.1 IDE interface: Intel Corporation 82371AB/EB/MB PIIX4 IDE (rev 01) (prog-if 8a [Master SecP PriP])
Subsystem: VMware Inc Device 1976
Flags: bus master, medium devsel, latency 64
[virtual] Memory at 000001f0 (32-bit, non-prefetchable) [disabled]
[virtual] Memory at 000003f0 (type 3, non-prefetchable) [disabled]
[virtual] Memory at 00000170 (32-bit, non-prefetchable) [disabled]
[virtual] Memory at 00000370 (type 3, non-prefetchable) [disabled]
I/O ports at 1050
Kernel driver in use: ata_piix
Kernel modules: ata_piix

00:07.2 USB Controller: Intel Corporation 82371AB/EB/MB PIIX4 USB
Subsystem: VMware Inc Device 1976
Flags: bus master, medium devsel, latency 64, IRQ 19
I/O ports at 1060
Kernel driver in use: uhci_hcd
Kernel modules: uhci-hcd

00:07.3 Bridge: Intel Corporation 82371AB/EB/MB PIIX4 ACPI (rev 08)
Subsystem: VMware Inc Device 1976
Flags: medium devsel, IRQ 9
Kernel modules: i2c-piix4

00:0f.0 VGA compatible controller: VMware Inc Abstract SVGA II Adapter
Subsystem: VMware Inc Abstract SVGA II Adapter
Flags: medium devsel
I/O ports at 1400
Memory at f0000000 (32-bit, non-prefetchable)
Memory at e8000000 (32-bit, non-prefetchable)
[virtual] Expansion ROM at 40100000 [disabled]

00:10.0 SCSI storage controller: LSI Logic / Symbios Logic 53c1030 PCI-X Fusion-MPT Dual Ultra320 SCSI (rev 01)
Flags: bus master, medium devsel, latency 64, IRQ 17
I/O ports at 1080 [size=128]
Memory at e8800000 (32-bit, non-prefetchable) [size=4K]
[virtual] Expansion ROM at 40108000 [disabled] [size=16K]
Kernel driver in use: mptspi
Kernel modules: mptspi

00:11.0 PCI bridge: VMware Inc PCI bridge (rev 01)
Flags: bus master, medium devsel, latency 64
Memory at e8801000 (64-bit, non-prefetchable) [size=4K]
Bus: primary=00, secondary=02, subordinate=02, sec-latency=68
I/O behind bridge: 00002000-00002fff
Memory behind bridge: e8900000-e89fffff
Prefetchable memory behind bridge: 0000000040000000-00000000400fffff
Capabilities: [40] Subsystem: VMware Inc PCI bridge
Kernel modules: shpchp

02:00.0 Ethernet controller: Advanced Micro Devices [AMD] 79c970 [PCnet32 LANCE] (rev 10)
Subsystem: Advanced Micro Devices [AMD] 79c970 [PCnet32 LANCE]
Flags: bus master, medium devsel, latency 64, IRQ 18
I/O ports at 2000 [size=128]
[virtual] Expansion ROM at 40000000 [disabled] [size=64K]
Kernel driver in use: pcnet32
Kernel modules: pcnet32

02:01.0 Multimedia audio controller: Ensoniq ES1371 [AudioPCI-97] (rev 02)
Subsystem: Ensoniq ES1371 [AudioPCI-97]
Flags: bus master, ?? devsel, latency 64, IRQ 19
I/O ports at 2080 [size=64]
Kernel driver in use: ENS1371
Kernel modules: snd-ens1371

02:02.0 USB Controller: VMware Inc Abstract USB2 EHCI Controller (prog-if 20)
Subsystem: VMware Inc Abstract USB2 EHCI Controller
Flags: bus master, fast devsel, latency 64, IRQ 16
Memory at e8900000 (32-bit, non-prefetchable) [size=4K]
Kernel driver in use: ehci_hcd
Kernel modules: ehci-hcd

[AutoXBC]

00:07.1 IDE interface: Intel Corporation 82371AB/EB/MB PIIX4 IDE (rev 01) (prog-if 8a [Master SecP PriP])
Subsystem: VMware Inc Device 1976
Flags: bus master, medium devsel, latency 64
[virtual] Memory at 000001f0 (32-bit, non-prefetchable) [disabled]
[virtual] Memory at 000003f0 (type 3, non-prefetchable) [disabled]
[virtual] Memory at 00000170 (32-bit, non-prefetchable) [disabled]
[virtual] Memory at 00000370 (type 3, non-prefetchable) [disabled]
I/O ports at 1050
Kernel driver in use: ata_piix
Kernel modules: ata_piix

这个模块编到内核里，scsi 条目中的一些模块也编进去，具体哪些忘记了，我已经不玩编译了。

[ctybeyond]

谢谢楼上的，这个选了，仍启不来，键盘后面两个灯一直在闪；不知道是不是udev的缘故，貌似ubuntu的udev是在initrd里实现的；有知道的DX指点一二啊。。。

[lonelycorn]

想当年我也为了把内核减小几KB而奋斗在一堆看不懂的选项和google上。现在我懒了，想开了，就用人家编译好的，多省心！