Linux Kernel 2.6.25 new release adds many new features

After more than two months of continuous improvement, the latest Linux kernel 2.6.25 has just been officially released. The new version of kernel has added many important new features, including:

The process group memory Resource Controller is based on the "Control Groups" added in 2.6.24. It separates the memory behavior of a group of tasks from other parts of the system and can be used:

· Isolate one or more programs. Memory Hunger programs can be restricted to a smaller space.

· Using a limited memory space to create a cgroup can replace the mem = XXXX option at startup.

· Better control of virtualization software.

· The CD/DVD recorder can control the remaining memory of the system to prevent failure of burning due to insufficient memory.

Real-time Group Scheduling is based on the Group Scheduling introduced in 2.6.24. It can give the process a Scheduling priority different from the nice level. In enterprise-level hardware systems, real-time task scheduling can be further optimized.

RCU (Read-copy-update) preemption supports the traditional RCU is a powerful mechanism on multiple CPU Systems, but it is not suitable for applications with low latent or high real-time requirements, because it will lead to high latent time, the new RCU preemption support makes multi-CPU Linux systems more real-time.

Other important features include: more accurate detection of memory usage of processes, detection of system transmission latency tools Latencytop, ACPI thermal adjustment, timerfd () system Call, EXT4 file system update, x86_64 EFI support, new Controller area network Protocol, new MN10300/AM33 architecture, x86 FIFO spinlocks support, etc. In addition, a large number of hardware device drivers are also updated.