Multi-threading Kernel 多线程内核
A lot of work in improving threading performance has gone into the 2.5 kernel.
在2.5内核中已经做了很多的改进线程性能的工作。
Threading operations will enjoy an increase in speed; the 2.6 kernel can now handle an arbitrary number of threads and up to 2 billion PIDs (on IA32).
线程操作可以提高速度；2.6内核现在可以处理任意数目的线程，PID最大可以到20亿(IA32上)。
For example the Linux Kernel introduced a new threading library in 2.6. This was the Native POSIX Linux thread library (NPTL).
举个例子吧，Linux Kernel 2.6引入了一个新的线程库，也就是本地的POSIX Linux线程库(NPTL)。
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