程序总算可以使用4G的内存了，不用重新build内核就可以搞定。
1、查看当前系统版本
执行uname -a
Linux ff 2.6.18-6-686 #1 SMP Sun Feb 10 22:11:31 UTC 2008 i686 GNU/Linux
其中2.6.18-6-686为内核版本号
2、搜索可安装的版本
执行apt-cache search linux bigmem
linux-headers-2.6.18-5-686-bigmem - Header files for Linux 2.6.18 on PPro/Celeron/PII/PIII/P4
linux-image-2.6.18-5-686-bigmem - Linux 2.6.18 image on PPro/Celeron/PII/PIII/P4
linux-headers-2.6-686-bigmem - Header files for Linux 2.6 on PPro/Celeron/PII/PIII/P4
linux-headers-2.6.18-4-686-bigmem - Header files for Linux 2.6.18 on PPro/Celeron/PII/PIII/P4
linux-headers-2.6.18-6-686-bigmem - Header files for Linux 2.6.18 on PPro/Celeron/PII/PIII/P4
linux-image-2.6-686-bigmem - Linux kernel 2.6 image on PPro/Celeron/PII/PIII/P4
linux-image-2.6.18-4-686-bigmem - Linux 2.6.18 image on PPro/Celeron/PII/PIII/P4
linux-image-2.6.18-6-686-bigmem - Linux 2.6.18 image on PPro/Celeron/PII/PIII/P4
linux-image-686-bigmem - Linux kernel image on PPro/Celeron/PII/PIII/P4
3、切换为root权限安装
找到对应版本的安装包
执行aptitude install linux-image-2.6.18-6-686-bigmem
4、新内核加到开机启动菜单
执行update-grub
Searching for GRUB installation directory ... found: /boot/grub
Searching for default file ... found: /boot/grub/default
Testing for an existing GRUB menu.lst file ... found: /boot/grub/menu.lst
Searching for splash image ... none found, skipping ...
Found kernel: /boot/vmlinuz-2.6.18-6-686-bigmem
Found kernel: /boot/vmlinuz-2.6.18-6-686
Found kernel: /boot/vmlinuz-2.6.18-4-686
Updating /boot/grub/menu.lst ... done
5、重启系统
执行reboot
6、再次检查一下系统版本
执行uname -a
Linux ff 2.6.18-6-686-bigmem #1 SMP Sun Feb 10 22:21:07 UTC 2008 i686 GNU/Linux
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