关于linux2.4.20抢占的问题。。。，谢谢各位帮个忙，

cyulii

有急用。。。
请问网上的内核2。4。20的抢占补丁，是直接修改源代码吗？请问网上有已经编译通过的抢占内核吗 ？
除了2。5的内核，
还有，请问有没有工具能测试该内核是否为抢占的，有在哪里可以得到，如果没有请问，我该怎样做才能知道该内核为抢占的，
小弟做毕业设计，急救。。。。。。。

Dragonfly

yes, these kinds of patches are always modify kernel source code directly
i do not if such kernel available,
2.5.x includes it.
check the benchmark on http://kpreempt.sourceforge.net/
i am not sure if such a program available. but i think it is not so difficult to write a program to test this.

base on its purpose
+CONFIG_PREEMPT
+  This option reduces the latency of the kernel when reacting to
+  real-time or interactive events by allowing a low priority process to
+  be preempted even if it is in kernel mode executing a system call.
+  This allows applications that need real-time response, such as audio
+  and other multimedia applications, to run more reliably even when the
+  system is under load due to other, lower priority, processes.
+
+  This option is currently experimental if used in conjuction with SMP
+  support.
+
+  Say Y here if you are building a kernel for a desktop system, embedded
+  system or real-time system.  Say N if you are building a kernel for a
+  system where throughput is more important than interactive response,
+  such as a server system.  Say N if you are unsure.
u can have two codes with different priorities. and see if one can get control from another one. design a scenario and implement it.

or if u are lazy to write, u can go its mailing list to answer if sb already wrote one.