1、ubuntu下面修改更新源 sudo gedit /etc/apt/sources.list
2、编译内核：
(1) cd 到/usr/src/下，解压下载的内核源代码包
(2) make mrproper 清理生成的文件(貌似对第一次编译内核没有必要)
(3) make menuconfig (如果不行，需要安装libncurses5-dev，使用命令 sudo apt-get install libncurses5-dev，搜索相关文件使用sudo apt-cache search 文件名)
我在安装时遇到问题：The following packages have unmet dependencies:
libncurses5-dev : Depends: libncurses5 (= 5.9-4) but 5.9-10ubuntu1 is to be installed
Depends: libtinfo-dev (= 5.9-4) but it is not going to be installed
Depends: ncurses-bin (= 5.9-4) but 5.9-10ubuntu1 is to be installed
解决是在http://packages.ubuntu.com/网站上直接下载了 libncurses5、libtinfo-dev和ncurses-bin的5.9.4版本，然后用dpkg命令进行了安装。
(4) make bzImage -jn (n为cpu个数)
(5) make modules
(6)make modules_install
(7)make install
制作启动盘# sudo mkinitramfs 3.19.3 -o /boot/initrd.img-3.19.3
更新grub2# sudo update-grub2
编译2.6.38内核错误
arch/x86/kernel/entry_32.S: Assembler messages:
arch/x86/kernel/entry_32.S:1422: Error: .size expression for apf_page_fault does not evaluate to a constant
make[2]: *** [arch/x86/kernel/entry_32.o] 错误 1
make[1]: *** [arch/x86/kernel] 错误 2
make: *** [arch/x86] 错误 2
解决：
- --- entry_32.S.original 2011-03-18 08:21:51.000000000 -0400
+++ entry_32.S 2011-03-20 10:37:00.000000000 -0400
@@ -343,7 +343,7 @@
# int/exception return?
jne work_pending
jmp restore_all
- -END(ret_from_exception)
+END(resume_userspace)
#ifdef CONFIG_PREEMPT
ENTRY(resume_kernel)
@@ -1413,7 +1413,7 @@
CFI_ADJUST_CFA_OFFSET 4
jmp error_code
CFI_ENDPROC
- -END(apf_page_fault)
+END(async_page_fault)
#endif
