Debian系統更新內核支持bigmem版本解決認不到4G內存

最近安裝了Debian 6.0.1a i3卻發現內核沒有自動加載上PAE 以下命令得知系統裝了兩條2G的內存條,硬件最大支持64G內存 dmidecode -t memory # dmidecode 2.9 SMBIOS 2.5 present. Handle 0x1000, DMI type 16, 15 bytes Physical Memory Array Location: System Board Or Motherboard Use: System Memory Error Correction Type: Multi-bit ECC Maximum Capacity: 65280 MB Error Information Handle: Not Provided Number Of Devices: 8 Handle 0x1100, DMI type 17, 28 bytes Memory Device Array Handle: 0x1000 Error Information Handle: Not Provided Total Width: 72 bits Data Width: 64 bits Size: 2048 MB Form Factor: FB-DIMM Set: 1 Locator: DIMM1 Bank Locator: Not Specified Type: DDR2 FB-DIMM Type Detail: Synchronous Speed: 667 MHz (1.5 ns) Manufacturer: 80CE808980CE Serial Number: 501A024B Asset Tag: 010908 Part Number: M395T5663QZ4-CE65 Handle 0x1101, DMI type 17, 28 bytes Memory Device Array Handle: 0x1000 Error Information Handle: Not Provided Total Width: 72 bits Data Width: 64 bits Size: 2048 MB Form Factor: FB-DIMM Set: 1 Locator: DIMM2 Bank Locator: Not Specified Type: DDR2 FB-DIMM Type Detail: Synchronous Speed: 667 MHz (1.5 ns) Manufacturer: 80CE808980CE Serial Number: 501A01C2 Asset Tag: 010908 Part Number: M395T5663QZ4-CE65 但是通過free命令得到只有3.3G

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再去之前幾台裝了Debian 5.0.4 upd 查看free命令得到只有3G

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對應的內核不一樣，得到內存總數也不一樣，針對這個問題只能安裝個支持4G(bigmem)對應內核版本

由於要安裝對應內核版本，所以先查看內核版本 root@debian:~/soft# uname -a Linux debian 2.6.32-5-686 #1 SMP Tue Mar 8 21:36:00 UTC 2011 i686 GNU/Linux
2.6.32-5-686這個有32-31與32-35 請注意 為了能搜索更多安裝包，先更新一下更新debian源 #Vi /etc/apt/sources.list deb http://mirrors.163.com/debian lenny main non-free contrib deb http://mirrors.163.com/debian lenny-proposed-updates main contrib non-free deb http://mirrors.163.com/debian-security lenny/updates main contrib non-free deb-src http://mirrors.163.com/debian lenny main non-free contrib deb-src http://mirrors.163.com/debian lenny-proposed-updates main contrib non-free deb-src http://mirrors.163.com/debian-security lenny/updates main contrib non-free 再執行以下幾個命令 #apt-get update #apt-get upgrade #apt-get dist-upgrade apt-cache search -t squeeze-backports linux-image

linux-headers-2.6.26-1-openvz-686 - Header files for Linux 2.6.26-1-openvz-686 linux-headers-2.6.26-1-vserver-686-bigmem - Header files for Linux 2.6.26-1-vserver-686-bigmem linux-headers-2.6.26-1-vserver-686 - Header files for Linux 2.6.26-1-vserver-686 linux-headers-2.6.26-1-xen-686 - Header files for Linux 2.6.26-1-xen-686 linux-image-2.6.26-1-486 - Linux 2.6.26 image on x86 linux-image-2.6.26-1-686-bigmem - Linux 2.6.26 image on PPro/Celeron/PII/PIII/P4 linux-image-2.6.26-1-686 - Linux 2.6.26 image on PPro/Celeron/PII/PIII/P4 linux-image-2.6.26-1-amd64 - Linux 2.6.26 image on AMD64 linux-image-2.6.26-1-openvz-686 - Linux 2.6.26 image on PPro/Celeron/PII/PIII/P4, OpenVZ support linux-image-2.6.26-1-vserver-686-bigmem - Linux 2.6.26 image on PPro/Celeron/PII/PIII/P4, Linux-VServer support linux-image-2.6.26-1-vserver-686 - Linux 2.6.26 image on PPro/Celeron/PII/PIII/P4, Linux-VServer support linux-image-2.6.26-1-xen-686 - Linux 2.6.26 image on i686, oldstyle Xen support linux-image-2.6.32-5-686 - Linux 2.6.32 for modern PCs linux-image-2.6.32-5-686-bigmem - Linux 2.6.32 for PCs with 4GB+ RAM linux-image-2.6-686 - Linux 2.6 for modern PCs (meta-package)
一直搜索不到以下版本，挺蛋疼的 linux-image-2.6.32-5-686-bigmem_2.6.32-31_i386.deb 只找到這個版本 linux-image-2.6.32-5-686-bigmem_2.6.32-35_i386.deb 而這個版本，系統本身的linux-base (>= 2.6.32-35)，所以無奈之下升級到linux-base_2.6.32-35，再安裝linux-image-2.6.32-5-686-bigmem_2.6.32-35_i386.deb，之前為什麼沒想直接升級linux-base，因為升級這個會可能導致一些設備驅動無法兼容導致沒加載成功 用root用戶安裝 wget http://ftp.cn.debian.org/debian/pool/main/l/linux-2.6/linux-base_2.6.32-35_all.deb dpkg -i linux-base_2.6.32-35_all.deb wget http://ftp.cn.debian.org/debian/pool/main/l/linux-2.6/linux-image-2.6.32-5-686-bigmem_2.6.32-35_i386.deb dpkg -i linux-image-2.6.32-5-686-bigmem_2.6.32-35_i386.deb 或者aptitude install linux-image-2.6.32-5-686-bigmem

新內核加到開機啟動菜單
root@debian:/etc# update-grub Generating grub.cfg ... Found linux image: /boot/vmlinuz-2.6.32-5-686-bigmem Found initrd image: /boot/initrd.img-2.6.32-5-686-bigmem Found linux image: /boot/vmlinuz-2.6.32-5-686 Found initrd image: /boot/initrd.img-2.6.32-5-686 done


最後重新啟動系統
再次檢查一下系統版本
root@debian:/etc# uname -a Linux debian 2.6.32-5-686-bigmem #1 SMP Mon Jun 13 05:03:09 UTC 2011 i686 GNU/Linux 再查看 root@debian:/etc# free total used free shared buffers cached Mem: 4144028 132564 4011464 0 3696 81800 -/+ buffers/cache: 47068 4096960 Swap: 5840888 0 5840888

說明成功了