nfs:server is not responding,still trying 原因与解决方案
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我想测试一下刚刚移植完的Linux内核,编写了一个简单的HelloWorld程序。但是在下载到arm2410s开发板时,冒出了nfs:server is not responding,still trying
一开始我以为是nfs出了问题,在nfs faq找到:
kernel: nfs: server server.domain.name not responding, still trying
kernel: nfs: task 10754 can't get a request slot
kernel: nfs: server server.domain.name OK
A. The "can't get a request slot" message means that the client-side RPC code has detected a lot of timeouts (perhaps due to network congestion, perhaps due to an overloaded server), and is throttling back the number of concurrent outstanding requests in an attempt to lighten the load. Some possible causes:
* Network congestion
* Overloaded server
* Packets (input or output) dropped by a bad NIC or driver....
根据上述观点,造成NFS没有回应的原因有3个,分别为网络拥塞、服务器过载和网卡丢包。
在我们的实验系统中,嵌入式系统和宿主机是直连的,而且服务器的基本处于空载的情形,所以不应该是前面两种情况,所以很可能是嵌入式系统网卡丢包严重引起的(可以在目标机器中,用ifconfig看了一下)。
NFS 的默认传输协议是UDP,而PC机与嵌入式系统通过UPD交互时就会出现严重的网卡丢包现象。可用的解决方案是:在客户端改用TCP协议,使用下面的命令, mount -t nfs -o intr,nolock,rsize=1024,wsize=1024 192.168.0.121:/主机nfs目录 /挂载路径
- nfs:server is not responding,still trying 原因与解决方案
- nfs:server is not responding,still trying 原因与解决方案
- nfs:server is not responding,still trying 原因与解决方案
- nfs:server is not responding,still trying 原因与解决方案
- nfs:server is not responding,still trying 原因与解决方案
- nfs:server is not responding,still trying 原因与解决方案
- nfs:server is not responding,still trying 原因与解决方案
- nfs:server is not responding,still trying 原因与解决方案
- nfs:server is not responding,still trying 原因与解决方案
- nfs:server is not responding,still trying原因与解决方案
- nfs:server is not responding,still trying 原因与解决方案
- nfs:server is not responding,still trying 原因与解决方案
- nfs:server is not responding,still trying 原因与解决方案
- nfs:server is not responding,still trying 原因与解决方案
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