On Wed, 2006-05-17 at 17:44 -0400, Xin Zhao wrote: > Thank you for your care. What I am trying to do is to rewrite NFS in > the virtual machine environment so that network communication can be > replaced with inter-VM communication. > > But after I remove the original rpc stuff, I ran into some strange > problem, including this one. Interesting thing is that I noticed that > even with standard NFS implementation, it is still possible that > nfsd_read() return resp->count to be 0. At this time, eof is also > equal to 1. This seems to be right since NFSD already reach the end of > the file. But question is since 0 byte is read this time, NFS should > detect EOF in previous read. Why need one more read? > > Xin How are you reading the file? Some programs (I believe 'cat' is one of them) will read a file until 0 is returned. Try writing a small C program to read a file until EOF and see if the behavior changes. Avishay Traeger http://www.fsl.cs.sunysb.edu/~avishay/ - To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
