读书笔记系列第一篇 -- Linux Kernel 版本号解析

Linux Kernle Version 总是一长串，各位数字具体的含义是什么，

根据MOS 文档 对Linux Kernel 的描述，整理了Linux Kernel 版本号的解释

MOS 文档 

Linux Kernel Version Nomenclature [ID 311504.1] 

Linux Kernel Version Numbering Explained [ID 308732.1]

如果一个Kernel Version 描述如下：

2.4.21-27.0.4.EL

^ ^ ^

| | |

| | The third number is the patch level version.

| |  

| The second number is the minor revision number. 

|

The first number is the major version number. 

第二位为偶数(even number)，表示这个版本是stable release, 第二位是奇数(odd number)，表示这个版本是development release

2.4.21-27.0.4.EL

    ^  ^^^

    |   |

    |   Security Errata 

   |

   Errata Kernel version

kernel patch and security patch 由后面的trail number 表示

常见Linux 版本及内核如下:

Red Hat Enterprise Linux (RHEL) 3

    ::= 2.4.21-EL

    ::= .|{}

    ::= {smp|hugemem}

Types:

none: Uniprocessor

smp: SMP up to 16GB

hugemem: SMP up to 64GB

Examples:

2.4.21-27.EL *

2.4.21-15.EL

2.4.21-27.ELhugemem

2.4.21-27.ELsmp

2.4.21-27.0.2.1.7.ELsmp

* On different hardware platforms, if there is no type, the kernel might be SMP already. See Note 362748.1

Red Hat Enterprise Linux 4

    ::= 2.6.9-.EL

    ::= .{.}

    ::= {smp|hugemem|largesmp|xenU}

Types:

none: Uniprocessor *

smp: SMP up to 16GB

hugemem: SMP up to 64GB

largesmp: x86_64 SMP for more than 4 CPUs

xenU: Kernel that can be run as a paravirtualized guest for Xen

* On different hardware platforms, if there is no type, the kernel might be  SMP already. See Note 362748.1

Examples:

2.6.9-5.EL

2.6.9-5.0.5.ELsmp

2.6.9-5.ELhugemem

2.6.9-67.ELxenU

Oracle Enterprise Linux 4

    ::= 2.6.9-.EL

    ::= ....

    ::= {smp|hugemem|largesmp|xenU}

Types:

none: Uniprocessor *

smp: SMP up to 16GB

hugemem: SMP up to 64GB

largesmp: x86_64 SMP for more than 4 CPUs

xenU: Kernel that can be run as a paravirtualized guest for Xen

* On different hardware platforms, if there is no type, the kernel might be  SMP already. See Note 362748.1

Examples:

2.6.9-42.0.0.0.1.EL

2.6.9-55.0.2.6.2.ELsmp

2.6.9-42.0.3.9.1.ELhugemem

2.6.9-67.0.0.0.1.ELxenU

Red Hat Enterprise Linux 5

    ::= 2.6.18-.el5

    ::= .{.}

    ::= {PAE|xen}

Types:

none: SMP kernel

PAE: Over 4GB of RAM (up to 64GB for the x86) - Physical Address Extension or 3-level paging on x86 processors that support PAE 

xen: Kernel that can run virtualized guests

Oracle Enterprise Linux 5

    ::= 2.6.18-.el5

    ::= ....

    ::= {PAE|xen}

Types:

none: SMP kernel

PAE: Over 4GB of RAM (up to 64GB for the x86) - Physical Address Extension or 3-level paging on x86 processors that support PAE 

xen: Kernel that can run virtualized guests

来自 “ ITPUB博客 ” ，链接：http://blog.itpub.net/158700/viewspace-757872/，如需转载，请注明出处，否则将追究法律责任。

转载于:http://blog.itpub.net/158700/viewspace-757872/