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Linux kernel 2.6.20.3 编译成功！

几经波折，终于把Linux内核搞定了。

起因是原先ubuntu带的内核版本较低， 决定升级，可是发现安装后modules 有59M。 启动后lsmod
再一看，俺的神呀， 刷刷地， 竟然有两屏。 另外新内核把我的ide硬盘人成了sda， grub里还要改革选项（一开始不知道，怎么也不能启动）， 于是决定自己编译一下。

不过过程并不顺利， 一个是我机器的配置， 是近10年前的笔记本， 编译一次内核要将近两个小时。 另外就是我没经验。

现在想想，可能一共得编译了十几次。 中间闹了很多笑话。比如一开始删的模块比较少， 编译完能启动， 但是modules仍有29M， 硬盘还是sda， 后来有狠心删了一次， 这回好了， modules小多了，硬盘也变回hda了， 可是initramfs mount根时说'no such device' ， 有时则是 kernel panic。 我在这个问题上就折腾了好久。还有一次是配置文件搞错了，一下编译了很多模块， 中间吃掉硬盘1G多， 告诉我‘no space left’。。。

中间配置了好几次， 一般都是把ubuntu默认的config拷过来并在此基础上修改。 今天终于成功了， 最后kernel是2M左右， modules一共5M多。 感觉上还能删一些， 不过不用了。

经过几次配置，我对kernel倒是有了进一步了解， 至少对其大概架构有了个印象。若不是我机器如此之慢， 编译过程应该也是很有趣的。现在残留的问题是有关声卡的，应该很容易解决。不过到现在我仍不清楚为什么一开始新内核会认成sda， 也听说一些同学有类似情况。

另外，在编译过程中参考了http://lamp.linux.gov.cn/Linux/kernel_options.html，很有帮助， 对作者表示感谢！
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