为了提供最佳的技术和稳定配合,红帽子公司在创造红帽子企业Linux 3时利用了核心混合的方式:把对商业/企业用户及ISVs有价值的Linux核心版本 2.6特性加入最新及稳定的Linux核心版本2.4内; 这方法让红帽子企业Linux产品拥有最新核心版本2.6的特点，同时也有卓越的稳定性。
以下图表列出了包括在Linux 2.6及红帽子企业Linux 3产品家族内最重要的新核心特点和笔记。新4GB-4GB memory split 特点，已在红帽子企业Linux 3的x86系统上供应,是一顶还未被Linux核心 版本2.6合并在内的。因此,红帽子企业Linux 3比Linux 2.6还支持更大的记忆及更大的应用( 这个特点正是被考虑在未来合并在Linux核心内)。
有少数特点，由对商业环境不够成熟，或顾客和ISV伙伴不需要的，都未被加入在内。红帽子企业Linux 3提供最佳的技术组合-最先进之特点加稳定及成熟性。
|
特 点 |
在Linux 2.6核心内 |
在红帽企业Linux 3内 |
提 供 |
|
Native Posix Thread Library (NPTL) |
是 |
是 |
High performance POSIX compliant multi-threading |
|
Kernel IPSec |
是 |
是 |
IPSec layer available for use by kernel modules |
|
Asynchro不us I/O (AIO) |
是 |
是 |
Improved application performance |
|
O(1) Scheduler |
是 |
是 |
Highly scalable SMP scheduler |
|
OProfile |
是 |
是 |
CPU-hardware-based performance monitoring |
|
kksymoops |
是 |
是 |
Improved kernel bug reporting |
|
Reverse Map Virtual Memory (rmap VM) |
是 |
是 |
Performance improvement in memory constrained systems |
|
HugeTLBFS |
是 |
是 |
Performance improvement for large virtual memory applications (e.g. Databases) |
|
Remap_file_pages |
是 |
是 |
Kernel memory optimization for shared memory applications |
|
2.6 Network stack features (IGMPv3, Ipv6, etc.) |
是 |
是 |
Improved network performance & messaging |
|
IPvs |
是 |
是 |
Network load balancing |
|
Access Control Lists (ACLs) |
是 |
是 |
Improved file system security management |
|
4GB-4GB memory split |
不 |
是 |
Greatly increased x86 physical memory support and larger application address space |
|
Scheduler support for hyperthreaded CPUs |
不 |
是 |
Improved hyperthreaded CPU performance. (2.6 implementation not yet comparable) |
|
Block I/O (BIO) block layer |
是 |
不 |
Major rewrite of the I/O subsystem (stabilization and driver support in progress) |
|
Support for > 2TB file system |
是 |
不 |
Support for very large volumes. Red Hat Enterprise Linux 3 supports up to 1 TB. |
|
New I/O elevators |
是 |
不 |
Fine tuning for I/O subsystem performance (stabilization in progress) |
|
Interactive scheduler response tuning |
是 |
不 |
Scheduler improvements for interactive tasks (stabilization in progress) |
